The pattern of any process, or the interrelationship of phenomena, which affects growth or change within a population.
Number of individuals in a population relative to space.
A functional system which includes the organisms of a natural community together with their environment. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Increase, over a specific period of time, in the number of individuals living in a country or region.
The longterm manifestations of WEATHER. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
A computer simulation developed to study the motion of molecules over a period of time.
Computer-based representation of physical systems and phenomena such as chemical processes.
The branch of science concerned with the interrelationship of organisms and their ENVIRONMENT, especially as manifested by natural cycles and rhythms, community development and structure, interactions between different kinds of organisms, geographic distributions, and population alterations. (Webster's, 3d ed)
Theoretical representations that simulate the behavior or activity of systems, processes, or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.
The total process by which organisms produce offspring. (Stedman, 25th ed)
The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics.
Processes that incorporate some element of randomness, used particularly to refer to a time series of random variables.
The external elements and conditions which surround, influence, and affect the life and development of an organism or population.
The study of systems which respond disproportionately (nonlinearly) to initial conditions or perturbing stimuli. Nonlinear systems may exhibit "chaos" which is classically characterized as sensitive dependence on initial conditions. Chaotic systems, while distinguished from more ordered periodic systems, are not random. When their behavior over time is appropriately displayed (in "phase space"), constraints are evident which are described by "strange attractors". Phase space representations of chaotic systems, or strange attractors, usually reveal fractal (FRACTALS) self-similarity across time scales. Natural, including biological, systems often display nonlinear dynamics and chaos.
The science dealing with the earth and its life, especially the description of land, sea, and air and the distribution of plant and animal life, including humanity and human industries with reference to the mutual relations of these elements. (From Webster, 3d ed)
Invertebrates or non-human vertebrates which transmit infective organisms from one host to another.
Periodic movements of animals in response to seasonal changes or reproductive instinct. Hormonal changes are the trigger in at least some animals. Most migrations are made for reasons of climatic change, feeding, or breeding.
The relationship between an invertebrate and another organism (the host), one of which lives at the expense of the other. Traditionally excluded from definition of parasites are pathogenic BACTERIA; FUNGI; VIRUSES; and PLANTS; though they may live parasitically.
Instinctual behavior pattern in which food is obtained by killing and consuming other species.
The continuous sequence of changes undergone by living organisms during the post-embryonic developmental process, such as metamorphosis in insects and amphibians. This includes the developmental stages of apicomplexans such as the malarial parasite, PLASMODIUM FALCIPARUM.
A large, subclass of arachnids comprising the MITES and TICKS, including parasites of plants, animals, and humans, as well as several important disease vectors.
A subfamily of MURIDAE found nearly world-wide and consisting of about 20 genera. Voles, lemmings, and muskrats are members.
The relationships of groups of organisms as reflected by their genetic makeup.
Genotypic differences observed among individuals in a population.
Water particles that fall from the ATMOSPHERE.
Places for cultivation and harvesting of fish, particularly in sea waters. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The discipline studying genetic composition of populations and effects of factors such as GENETIC SELECTION, population size, MUTATION, migration, and GENETIC DRIFT on the frequencies of various GENOTYPES and PHENOTYPES using a variety of GENETIC TECHNIQUES.
The protection, preservation, restoration, and rational use of all resources in the total environment.
The sequence of transfers of matter and energy from organism to organism in the form of FOOD. Food chains intertwine locally into a food web because most organisms consume more than one type of animal or plant. PLANTS, which convert SOLAR ENERGY to food by PHOTOSYNTHESIS, are the primary food source. In a predator chain, a plant-eating animal is eaten by a larger animal. In a parasite chain, a smaller organism consumes part of a larger host and may itself be parasitized by smaller organisms. In a saprophytic chain, microorganisms live on dead organic matter.
A plant genus of the family Plantaginaceae. Members contain bis-sesquiterpene and iridoid glucosides.
Elements of limited time intervals, contributing to particular results or situations.
The reduction or regulation of the population of noxious, destructive, or dangerous plants, insects, or other animals. This includes control of plants that serve as habitats or food sources for animal pests.
The science that deals with the ocean and its phenomena. (Webster, 3d ed)
Minute free-floating animal organisms which live in practically all natural waters.
A monocot family within the order Liliales. This family is divided by some botanists into other families such as Convallariaceae, Hyacinthaceae and Amaryllidaceae. Amaryllidaceae, which have inferior ovaries, includes CRINUM; GALANTHUS; LYCORIS; and NARCISSUS and are known for AMARYLLIDACEAE ALKALOIDS.
The state of the ATMOSPHERE over minutes to months.
The ceasing of existence of a species or taxonomic groups of organisms.
Any of several large carnivorous mammals of the family CANIDAE that usually hunt in packs.
Free-floating minute organisms that are photosynthetic. The term is non-taxonomic and refers to a lifestyle (energy utilization and motility), rather than a particular type of organism. Most, but not all, are unicellular algae. Important groups include DIATOMS; DINOFLAGELLATES; CYANOBACTERIA; CHLOROPHYTA; HAPTOPHYTA; CRYPTOMONADS; and silicoflagellates.
The capacity to conceive or to induce conception. It may refer to either the male or female.
The process of cumulative change at the level of DNA; RNA; and PROTEINS, over successive generations.
The inter- and intra-relationships between various microorganisms. This can include both positive (like SYMBIOSIS) and negative (like ANTIBIOSIS) interactions. Examples include virus - bacteria and bacteria - bacteria.
Statistical formulations or analyses which, when applied to data and found to fit the data, are then used to verify the assumptions and parameters used in the analysis. Examples of statistical models are the linear model, binomial model, polynomial model, two-parameter model, etc.
Any of several carnivores in the family CANIDAE, that possess erect ears and long bushy tails and are smaller than WOLVES. They are classified in several genera and found on all continents except Antarctica.
The process of laying or shedding fully developed eggs (OVA) from the female body. The term is usually used for certain INSECTS or FISHES with an organ called ovipositor where eggs are stored or deposited before expulsion from the body.
Any significant change in measures of climate (such as temperature, precipitation, or wind) lasting for an extended period (decades or longer). It may result from natural factors such as changes in the sun's intensity, natural processes within the climate system such as changes in ocean circulation, or human activities.
Infections or infestations with parasitic organisms. The infestation may be experimental or veterinary.
Frozen water crystals that fall from the ATMOSPHERE.
Insects that transmit infective organisms from one host to another or from an inanimate reservoir to an animate host.
The variety of all native living organisms and their various forms and interrelationships.
The spectrum of different living organisms inhabiting a particular region, habitat, or biotope.
Warm-blooded VERTEBRATES possessing FEATHERS and belonging to the class Aves.
A family of the order DIPTERA that comprises the mosquitoes. The larval stages are aquatic, and the adults can be recognized by the characteristic WINGS, ANIMAL venation, the scales along the wing veins, and the long proboscis. Many species are of particular medical importance.
The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.
The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.
Differential and non-random reproduction of different genotypes, operating to alter the gene frequencies within a population.
One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive.
Water containing no significant amounts of salts, such as water from RIVERS and LAKES.
Wormlike or grublike stage, following the egg in the life cycle of insects, worms, and other metamorphosing animals.
Behavioral responses or sequences associated with eating including modes of feeding, rhythmic patterns of eating, and time intervals.
Statistical interpretation and description of a population with reference to distribution, composition, or structure.
The relationship between two different species of organisms that are interdependent; each gains benefits from the other or a relationship between different species where both of the organisms in question benefit from the presence of the other.
Theoretical representations that simulate the behavior or activity of genetic processes or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.
Any of various ruminant mammals of the order Bovidae. They include numerous species in Africa and the American pronghorn.
The functions, behavior, and activities of bacteria.
The number of males per 100 females.
A huge subclass of mostly marine CRUSTACEA, containing over 14,000 species. The 10 orders comprise both planktonic and benthic organisms, and include both free-living and parasitic forms. Planktonic copepods form the principle link between PHYTOPLANKTON and the higher trophic levels of the marine food chains.
Marine, freshwater, or terrestrial mollusks of the class Gastropoda. Most have an enclosing spiral shell, and several genera harbor parasites pathogenic to man.
A theorem in probability theory named for Thomas Bayes (1702-1761). In epidemiology, it is used to obtain the probability of disease in a group of people with some characteristic on the basis of the overall rate of that disease and of the likelihood of that characteristic in healthy and diseased individuals. The most familiar application is in clinical decision analysis where it is used for estimating the probability of a particular diagnosis given the appearance of some symptoms or test result.
A suborder of the order ARTIODACTYLA whose members have the distinguishing feature of a four-chambered stomach, including the capacious RUMEN. Horns or antlers are usually present, at least in males.
Slender-bodies diurnal insects having large, broad wings often strikingly colored and patterned.
A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis.
A family of the order DIPTERA with over 700 species. Important species that may be mechanical vectors of disease include Musca domesticus (HOUSEFLIES), Musca autumnalis (face fly), Stomoxys calcitrans (stable fly), Haematobia irritans (horn fly) and Fannia spp.
A family (Aphididae) of small insects, in the suborder Sternorrhyncha, that suck the juices of plants. Important genera include Schizaphis and Myzus. The latter is known to carry more than 100 virus diseases between plants.
The physical measurements of a body.
BEETLES in the family Curculionidae and the largest family in the order COLEOPTERA. They have a markedly convex shape and many are considered pests.
An order of the class Insecta. Wings, when present, number two and distinguish Diptera from other so-called flies, while the halteres, or reduced hindwings, separate Diptera from other insects with one pair of wings. The order includes the families Calliphoridae, Oestridae, Phoridae, SARCOPHAGIDAE, Scatophagidae, Sciaridae, SIMULIIDAE, Tabanidae, Therevidae, Trypetidae, CERATOPOGONIDAE; CHIRONOMIDAE; CULICIDAE; DROSOPHILIDAE; GLOSSINIDAE; MUSCIDAE; TEPHRITIDAE; and PSYCHODIDAE. The larval form of Diptera species are called maggots (see LARVA).
The direct struggle between individuals for environmental necessities or for a common goal.
Unstable isotopes of lead that decay or disintegrate emitting radiation. Pb atoms with atomic weights 194-203, 205, and 209-214 are radioactive lead isotopes.
Total mass of all the organisms of a given type and/or in a given area. (From Concise Dictionary of Biology, 1990) It includes the yield of vegetative mass produced from any given crop.
Fish of the genera ONCORHYNCHUS and Salmo in the family SALMONIDAE. They are anadromous game fish, frequenting the coastal waters of both the North Atlantic and Pacific. They are known for their gameness as a sport fish and for the quality of their flesh as a table fish. (Webster, 3d ed).
An order of BIRDS including over 300 species that primarily inhabit coastal waters, beaches, and marshes. They are comprised of shorebirds, gulls, and terns.
Woody, usually tall, perennial higher plants (Angiosperms, Gymnosperms, and some Pterophyta) having usually a main stem and numerous branches.
A phylum of bacteria comprised of three classes: Bacteroides, Flavobacteria, and Sphingobacteria.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
A process by which animals in various forms and stages of development are physically distributed through time and space.
Ecosystem and environmental activities, functions, or events.
An animal or plant species in danger of extinction. Causes can include human activity, changing climate, or change in predator/prey ratios.
A genus of mosquitoes (CULICIDAE) frequently found in tropical and subtropical regions. YELLOW FEVER and DENGUE are two of the diseases that can be transmitted by species of this genus.
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
INSECTS of the order Coleoptera, containing over 350,000 species in 150 families. They possess hard bodies and their mouthparts are adapted for chewing.
The reduction or regulation of the population of noxious, destructive, or dangerous insects through chemical, biological, or other means.
The prevention of growth and or spread of unwanted plants.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
The capability of an organism to survive and reproduce. The phenotypic expression of the genotype in a particular environment determines how genetically fit an organism will be.
Systems that provide for the maintenance of life in an isolated living chamber through reutilization of the material available, in particular, by means of a cycle wherein exhaled carbon dioxide, urine, and other waste matter are converted chemically or by photosynthesis into oxygen, water, and food. (NASA Thesaurus, 1988)
The simplest saturated hydrocarbon. It is a colorless, flammable gas, slightly soluble in water. It is one of the chief constituents of natural gas and is formed in the decomposition of organic matter. (Grant & Hackh's Chemical Dictionary, 5th ed)
The various physical methods which include wind, insects, animals, tension, and water, by which a plant scatters its seeds away from the parent plant.
A type of climate characterized by insufficient moisture to support appreciable plant life. It is a climate of extreme aridity, usually of extreme heat, and of negligible rainfall. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Enumeration by direct count of viable, isolated bacterial, archaeal, or fungal CELLS or SPORES capable of growth on solid CULTURE MEDIA. The method is used routinely by environmental microbiologists for quantifying organisms in AIR; FOOD; and WATER; by clinicians for measuring patients' microbial load; and in antimicrobial drug testing.
A variety of simple repeat sequences that are distributed throughout the GENOME. They are characterized by a short repeat unit of 2-8 basepairs that is repeated up to 100 times. They are also known as short tandem repeats (STRs).
Tools or devices for generating products using the synthetic or chemical conversion capacity of a biological system. They can be classical fermentors, cell culture perfusion systems, or enzyme bioreactors. For production of proteins or enzymes, recombinant microorganisms such as bacteria, mammalian cells, or insect or plant cells are usually chosen.
A great expanse of continuous bodies of salt water which together cover more than 70 percent of the earth's surface. Seas may be partially or entirely enclosed by land, and are smaller than the five oceans (Atlantic, Pacific, Indian, Arctic, and Antarctic).
Any arthropod of the subclass ACARI except the TICKS. They are minute animals related to the spiders, usually having transparent or semitransparent bodies. They may be parasitic on humans and domestic animals, producing various irritations of the skin (MITE INFESTATIONS). Many mite species are important to human and veterinary medicine as both parasite and vector. Mites also infest plants.
Activities performed by humans.
The family Cervidae of 17 genera and 45 species occurring nearly throughout North America, South America, and Eurasia, on most associated continental islands, and in northern Africa. Wild populations of deer have been established through introduction by people in Cuba, New Guinea, Australia, New Zealand, and other places where the family does not naturally occur. They are slim, long-legged and best characterized by the presence of antlers. Their habitat is forests, swamps, brush country, deserts, and arctic tundra. They are usually good swimmers; some migrate seasonally. (Walker's Mammals of the World, 5th ed, p1362)
A genus of the family BACULOVIRIDAE, subfamily Eubaculovirinae, characterized by ovicylindrical occlusion bodies. The type species is Cydia pomonella granulovirus.
A genus of mosquitoes (CULICIDAE) that are known vectors of MALARIA.
Fish-eating carnivores of the family MUSTELIDAE, found on both hemispheres.
A genus of marine mussels in the family MYTILIDAE, class BIVALVIA. The species MYTILUS EDULIS is the highly edible common mussel.
Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis.
A body of water covering approximately one-fifth of the total ocean area of the earth, extending amidst Africa in the west, Australia in the east, Asia in the north, and Antarctica in the south. Including the Red Sea and the Persian Gulf, it constitutes the third largest ocean after the ATLANTIC OCEAN and the PACIFIC OCEAN. (New Encyclopaedia Britannica Micropaedia, 15th ed, 1990, p289)
A field of study concerned with the principles and processes governing the geographic distributions of genealogical lineages, especially those within and among closely related species. (Avise, J.C., Phylogeography: The History and Formation of Species. Harvard University Press, 2000)
The presence of bacteria, viruses, and fungi in water. This term is not restricted to pathogenic organisms.
Ecological and environmental entities, characteristics, properties, relationships and processes.
BIRDS that hunt and kill other animals, especially higher vertebrates, for food. They include the FALCONIFORMES order, or diurnal birds of prey, comprised of EAGLES, falcons, HAWKS, and others, as well as the STRIGIFORMES order, or nocturnal birds of prey, which includes OWLS.
Reproduction without fusion of two types of cells, mostly found in ALGAE; FUNGI; and PLANTS. Asexual reproduction occurs in several ways, such as budding, fission, or splitting from "parent" cells. Only few groups of ANIMALS reproduce asexually or unisexually (PARTHENOGENESIS).
The act of feeding on plants by animals.
The most diversified of all fish orders and the largest vertebrate order. It includes many of the commonly known fish such as porgies, croakers, sunfishes, dolphin fish, mackerels, TUNA, etc.
The family of true toads belonging to the order Anura. The genera include Bufo, Ansonia, Nectophrynoides, and Atelopus.
The effect of GLOBAL WARMING and the resulting increase in world temperatures. The predicted health effects of such long-term climatic change include increased incidence of respiratory, water-borne, and vector-borne diseases.
A family of winged insects of the suborder HETEROPTERA, called assassin bugs, because most prey on other insects. However one subfamily, TRIATOMINAE, attacks humans and other vertebrates and transmits Chagas disease.
An order of heavy-bodied, largely terrestrial BIRDS including pheasants, TURKEYS, grouse, QUAIL, and CHICKENS.
A large order of insects characterized by having the mouth parts adapted to piercing or sucking. It is comprised of four suborders: HETEROPTERA, Auchenorrhyncha, Sternorrhyncha, and Coleorrhyncha.
The non-genetic biological changes of an organism in response to challenges in its ENVIRONMENT.
Theoretical construct used in applied mathematics to analyze certain situations in which there is an interplay between parties that may have similar, opposed, or mixed interests. In a typical game, decision-making "players," who each have their own goals, try to gain advantage over the other parties by anticipating each other's decisions; the game is finally resolved as a consequence of the players' decisions.
Any of numerous winged hymenopterous insects of social as well as solitary habits and having formidable stings.
A phylum of EUKARYOTES characterized by the presence of cilia at some time during the life cycle. It comprises three classes: KINETOFRAGMINOPHOREA; OLIGOHYMENOPHOREA; and POLYMENOPHOREA.
An inactive stage between the larval and adult stages in the life cycle of insects.
A set of statistical methods used to group variables or observations into strongly inter-related subgroups. In epidemiology, it may be used to analyze a closely grouped series of events or cases of disease or other health-related phenomenon with well-defined distribution patterns in relation to time or place or both.
The discarding or destroying of liquid waste products or their transformation into something useful or innocuous.
An order of MAMMALS, usually flesh eaters with appropriate dentition. Suborders include the terrestrial carnivores Fissipedia, and the aquatic carnivores PINNIPEDIA.
Non-native organisms brought into a region, habitat, or ECOSYSTEM by human activity.
A family of small, gram-negative organisms, often parasitic in humans and other animals, causing diseases that may be transmitted by invertebrate vectors.
The presence of bacteria, viruses, and fungi in the soil. This term is not restricted to pathogenic organisms.
In statistics, a technique for numerically approximating the solution of a mathematical problem by studying the distribution of some random variable, often generated by a computer. The name alludes to the randomness characteristic of the games of chance played at the gambling casinos in Monte Carlo. (From Random House Unabridged Dictionary, 2d ed, 1993)
The genetic constitution of the individual, comprising the ALLELES present at each GENETIC LOCUS.
Changes in biological features that help an organism cope with its ENVIRONMENT. These changes include physiological (ADAPTATION, PHYSIOLOGICAL), phenotypic and genetic changes.
The change in gene frequency in a population due to migration of gametes or individuals (ANIMAL MIGRATION) across population barriers. In contrast, in GENETIC DRIFT the cause of gene frequency changes are not a result of population or gamete movement.
A species of mosquito in the genus Anopheles and the principle vector of MALARIA in Africa.
Animals considered to be wild or feral or not adapted for domestic use. It does not include wild animals in zoos for which ANIMALS, ZOO is available.
The visually perceived property of objects created by absorption or reflection of specific wavelengths of light.
A genus of bacteria comprised of a heterogenous group of gram-negative small rods and coccoid forms associated with arthropods. (From Bergey's Manual of Systematic Bacteriology, vol 1, 1984)
In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships.
A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.
Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.
A climate which is typical of equatorial and tropical regions, i.e., one with continually high temperatures with considerable precipitation, at least during part of the year. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A mammalian order which consists of 29 families and many genera.
The properties of a pathogen that makes it capable of infecting one or more specific hosts. The pathogen can include PARASITES as well as VIRUSES; BACTERIA; FUNGI; or PLANTS.
A large plant family of the order Asterales, subclass Asteridae, class Magnoliopsida. The family is also known as Compositae. Flower petals are joined near the base and stamens alternate with the corolla lobes. The common name of "daisy" refers to several genera of this family including Aster; CHRYSANTHEMUM; RUDBECKIA; TANACETUM.
Use of naturally-occuring or genetically-engineered organisms to reduce or eliminate populations of pests.
A thick mass of ICE formed over large regions of land; RIVERS; LAKES; ponds; or SEAWATER.
DNA sequences encoding RIBOSOMAL RNA and the segments of DNA separating the individual ribosomal RNA genes, referred to as RIBOSOMAL SPACER DNA.
Behavior in defense of an area against another individual or individuals primarily of the same species.
The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).
The encapsulated embryos of flowering plants. They are used as is or for animal feed because of the high content of concentrated nutrients like starches, proteins, and fats. Rapeseed, cottonseed, and sunflower seed are also produced for the oils (fats) they yield.
A class of minute animals of the phylum Aschelminthes.
Marine ridges composed of living CORALS, coral skeletons, calcareous algae, and other organisms, mixed with minerals and organic matter. They are found most commonly in tropical waters and support other animal and plant life.
Functions constructed from a statistical model and a set of observed data which give the probability of that data for various values of the unknown model parameters. Those parameter values that maximize the probability are the maximum likelihood estimates of the parameters.
A diverse genus of minute freshwater CRUSTACEA, of the suborder CLADOCERA. They are a major food source for both young and adult freshwater fish.
A genus of planorbid freshwater snails, species of which are intermediate hosts of Schistosoma mansoni.
The unconsolidated mineral or organic matter on the surface of the earth that serves as a natural medium for the growth of land plants.
The rate dynamics in chemical or physical systems.
A widely distributed order of perching BIRDS, including more than half of all bird species.
A rigorously mathematical analysis of energy relationships (heat, work, temperature, and equilibrium). It describes systems whose states are determined by thermal parameters, such as temperature, in addition to mechanical and electromagnetic parameters. (From Hawley's Condensed Chemical Dictionary, 12th ed)
Physiological processes and properties of BACTERIA.
Deoxyribonucleic acid that makes up the genetic material of bacteria.
Insects of the suborder Heterocera of the order LEPIDOPTERA.
Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers.
PASSERIFORMES of the suborder, Oscines, in which the flexor tendons of the toes are separate, and the lower syrinx has 4 to 9 pairs of tensor muscles inserted at both ends of the tracheal half rings. They include many commonly recognized birds such as CROWS; FINCHES; robins; SPARROWS; and SWALLOWS.
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A technique for identifying individuals of a species that is based on the uniqueness of their DNA sequence. Uniqueness is determined by identifying which combination of allelic variations occur in the individual at a statistically relevant number of different loci. In forensic studies, RESTRICTION FRAGMENT LENGTH POLYMORPHISM of multiple, highly polymorphic VNTR LOCI or MICROSATELLITE REPEAT loci are analyzed. The number of loci used for the profile depends on the ALLELE FREQUENCY in the population.
Animate or inanimate sources which normally harbor disease-causing organisms and thus serve as potential sources of disease outbreaks. Reservoirs are distinguished from vectors (DISEASE VECTORS) and carriers, which are agents of disease transmission rather than continuing sources of potential disease outbreaks.
The continuous remodeling of MITOCHONDRIA shape by fission and fusion in response to physiological conditions.
One of the three domains of life (the others being BACTERIA and ARCHAEA), also called Eukarya. These are organisms whose cells are enclosed in membranes and possess a nucleus. They comprise almost all multicellular and many unicellular organisms, and are traditionally divided into groups (sometimes called kingdoms) including ANIMALS; PLANTS; FUNGI; and various algae and other taxa that were previously part of the old kingdom Protista.
A plant species of the family BRASSICACEAE best known for the edible roots.
Multicellular, eukaryotic life forms of kingdom Plantae (sensu lato), comprising the VIRIDIPLANTAE; RHODOPHYTA; and GLAUCOPHYTA; all of which acquired chloroplasts by direct endosymbiosis of CYANOBACTERIA. They are characterized by a mainly photosynthetic mode of nutrition; essentially unlimited growth at localized regions of cell divisions (MERISTEMS); cellulose within cells providing rigidity; the absence of organs of locomotion; absence of nervous and sensory systems; and an alternation of haploid and diploid generations.
The reduction or regulation of the population of mosquitoes through chemical, biological, or other means.
An acute febrile disease transmitted by the bite of AEDES mosquitoes infected with DENGUE VIRUS. It is self-limiting and characterized by fever, myalgia, headache, and rash. SEVERE DENGUE is a more virulent form of dengue.
Large natural streams of FRESH WATER formed by converging tributaries and which empty into a body of water (lake or ocean).
Double-stranded DNA of MITOCHONDRIA. In eukaryotes, the mitochondrial GENOME is circular and codes for ribosomal RNAs, transfer RNAs, and about 10 proteins.
The salinated water of OCEANS AND SEAS that provides habitat for marine organisms.
Diseases of plants.
A natural association between organisms that is detrimental to at least one of them. This often refers to the production of chemicals by one microorganism that is harmful to another.
Theoretical representations that simulate the behavior or activity of chemical processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.
A large family of narrow-leaved herbaceous grasses of the order Cyperales, subclass Commelinidae, class Liliopsida (monocotyledons). Food grains (EDIBLE GRAIN) come from members of this family. RHINITIS, ALLERGIC, SEASONAL can be induced by POLLEN of many of the grasses.
Measurements of the height, weight, length, area, etc., of the human and animal body or its parts.
The class Insecta, in the phylum ARTHROPODA, whose members are characterized by division into three parts: head, thorax, and abdomen. They are the dominant group of animals on earth; several hundred thousand different kinds having been described. Three orders, HEMIPTERA; DIPTERA; and SIPHONAPTERA; are of medical interest in that they cause disease in humans and animals. (From Borror et al., An Introduction to the Study of Insects, 4th ed, p1)
The interactions between a host and a pathogen, usually resulting in disease.
Theoretical representations that simulate the behavior or activity of the neurological system, processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.
The monitoring of the level of toxins, chemical pollutants, microbial contaminants, or other harmful substances in the environment (soil, air, and water), workplace, or in the bodies of people and animals present in that environment.
The chromosomal constitution of a cell containing multiples of the normal number of CHROMOSOMES; includes triploidy (symbol: 3N), tetraploidy (symbol: 4N), etc.
The science, art or practice of cultivating soil, producing crops, and raising livestock.

Prediction of genetic contributions and generation intervals in populations with overlapping generations under selection. (1/4953)

A method to predict long-term genetic contributions of ancestors to future generations is studied in detail for a population with overlapping generations under mass or sib index selection. An existing method provides insight into the mechanisms determining the flow of genes through selected populations, and takes account of selection by modeling the long-term genetic contribution as a linear regression on breeding value. Total genetic contributions of age classes are modeled using a modified gene flow approach and long-term predictions are obtained assuming equilibrium genetic parameters. Generation interval was defined as the time in which genetic contributions sum to unity, which is equal to the turnover time of genes. Accurate predictions of long-term genetic contributions of individual animals, as well as total contributions of age classes were obtained. Due to selection, offspring of young parents had an above-average breeding value. Long-term genetic contributions of youngest age classes were therefore higher than expected from the age class distribution of parents, and generation interval was shorter than the average age of parents at birth of their offspring. Due to an increased selective advantage of offspring of young parents, generation interval decreased with increasing heritability and selection intensity. The method was compared to conventional gene flow and showed more accurate predictions of long-term genetic contributions.  (+info)

Ancestral Asian source(s) of new world Y-chromosome founder haplotypes. (2/4953)

Haplotypes constructed from Y-chromosome markers were used to trace the origins of Native Americans. Our sample consisted of 2,198 males from 60 global populations, including 19 Native American and 15 indigenous North Asian groups. A set of 12 biallelic polymorphisms gave rise to 14 unique Y-chromosome haplotypes that were unevenly distributed among the populations. Combining multiallelic variation at two Y-linked microsatellites (DYS19 and DXYS156Y) with the unique haplotypes results in a total of 95 combination haplotypes. Contra previous findings based on Y- chromosome data, our new results suggest the possibility of more than one Native American paternal founder haplotype. We postulate that, of the nine unique haplotypes found in Native Americans, haplotypes 1C and 1F are the best candidates for major New World founder haplotypes, whereas haplotypes 1B, 1I, and 1U may either be founder haplotypes and/or have arrived in the New World via recent admixture. Two of the other four haplotypes (YAP+ haplotypes 4 and 5) are probably present because of post-Columbian admixture, whereas haplotype 1G may have originated in the New World, and the Old World source of the final New World haplotype (1D) remains unresolved. The contrasting distribution patterns of the two major candidate founder haplotypes in Asia and the New World, as well as the results of a nested cladistic analysis, suggest the possibility of more than one paternal migration from the general region of Lake Baikal to the Americas.  (+info)

Long-term studies of hantavirus reservoir populations in the southwestern United States: rationale, potential, and methods. (3/4953)

Hantaviruses are rodent-borne zoonotic agents that cause hemorrhagic fever with renal syndrome in Asia and Europe and hantavirus pulmonary syndrome (HPS) in North and South America. The epidemiology of human diseases caused by these viruses is tied to the ecology of the rodent hosts, and effective control and prevention relies on a through understanding of host ecology. After the 1993 HPS outbreak in the southwestern United States, the Centers for Disease Control and Prevention initiated long-term studies of the temporal dynamics of hantavirus infection in host populations. These studies, which used mark-recapture techniques on 24 trapping webs at nine sites in the southwestern United States, were designed to monitor changes in reservoir population densities and in the prevalence and incidence of infection; quantify environmental factors associated with these changes; and when linked to surveillance databases for HPS, lead to predictive models of human risk to be used in the design and implementation of control and prevention measures for human hantavirus disease.  (+info)

Long-term hantavirus persistence in rodent populations in central Arizona. (4/4953)

For 35 months, we monitored hantavirus activity in rodent populations in central Arizona. The most frequently captured hantavirus antibody-positive rodents were Peromyscus boylii and P. truei. Antibody-positive P. boylii were more frequently male (84%), older, and heavier, and they survived longer on trapping web sites than antibody-negative mice. The number of antibody-positive P. boylii was greater during high population densities than during low densities, while antibody prevalence was greater during low population densities. Virus transmission and incidence rates, also related to population densities, varied by trapping site. The spatial distribution of antibody-positive P. boylii varied by population density and reflected the species preference for dense chaparral habitats. The focal ranges of antibody-positive P. boylii also demonstrated a patchy distribution of hantavirus.  (+info)

A longitudinal study of Sin Nombre virus prevalence in rodents, southeastern Arizona. (5/4953)

We determined the prevalence of Sin Nombre virus antibodies in small mammals in southeastern Arizona. Of 1,234 rodents (from 13 species) captured each month from May through December 1995, only mice in the genus Peromyscus were seropositive. Antibody prevalence was 14.3% in 21 white-footed mice (P. leucopus), 13.3% in 98 brush mice (P. boylii), 0.8% in 118 cactus mice (P. eremicus), and 0% in 2 deer mice (P. maniculatus). Most antibody-positive mice were adult male Peromyscus captured close to one another early in the study. Population dynamics of brush mice suggest a correlation between population size and hantavirus-antibody prevalence.  (+info)

The changing elderly population and future health care needs. (6/4953)

The impending growth of the elderly population requires both fiscal and substantive changes in Medicare and Medicaid that are responsive to cost issues and to changing patterns of need. More emphasis is required on chronic disease management, on meaningful integration between acute and long-term care services, and on improved coordination between Medicare and Medicaid initiatives. This paper reviews various trends, including the growth in managed-care approaches, experience with social health maintenance organizations and Program of All-Inclusive Care for the Elderly demonstrations, and the need for a coherent long-term care policy. Such policies, however, transcend health care and require a broad range of community initiatives.  (+info)

Sex-biased dispersal in sperm whales: contrasting mitochondrial and nuclear genetic structure of global populations. (7/4953)

The social organization of most mammals is characterized by female philopatry and male dispersal. Such sex-biased dispersal can cause the genetic structure of populations to differ between the maternally inherited mitochondrial DNA (mtDNA) and the bi-parental nuclear genome. Here we report on the global genetic structure of oceanic populations of the sperm whale, one of the most widely distributed mammalian species. Groups of females and juveniles are mainly found at low latitudes, while males reach polar waters, returning to tropical and subtropical waters to breed. In comparisons between oceans, we did not find significant heterogeneity in allele frequencies of microsatellite loci (exact test; p = 0.23). Estimates of GST = 0.001 and RST = 0.005 also indicated negligible if any nuclear DNA differentiation. We have previously reported significant differentiation between oceans in mtDNA sequences. These contrasting patterns suggest that interoceanic movements have been more prevalent among males than among females, consistent with observations of females being the philopatric sex and having a more limited latitudinal distribution than males. Consequently, the typical mammalian dispersal pattern may have operated on a global scale in sperm whales.  (+info)

Patient health management: a promising paradigm in Canadian healthcare. (8/4953)

Disease management, or the focused application of resources to achieve desired health outcomes, began in Canada in 1971 with the introduction of a universal healthcare program and a single government payor. Although relatively unfocused and nonrestrictive by contemporary standards, this program was successful in terms of outcomes. However, it is expensive, and Canada's rapidly aging population is fueling a growing demand for more efficacious medical therapies. As a result, isolated services are being restricted in an effort to reduce costs. As a result of these changes and low prescription and patient compliance rates for efficacious therapies, total system costs have risen, there is a growing concern about deterioration of health outcomes, and stakeholders are dissatisfied. To optimize healthcare outcomes and reduce costs, a new paradigm--patient health management (PHM)--has emerged. With PHM, clinical and cost outcomes are continually measured and communicated to providers in an attempt to promote more efficacious care. PHM also seeks to avoid restrictive practices that are now associated with detrimental health outcomes and increased costs. PHM has proved successful when applied to acute and chronic cardiac disease treatment. It remains untested for most other diseases, but available data suggest that the comprehensive, evidence-based disease and systems management that characterizes PHM is likely to achieve the best health outcomes for the most people at the lowest possible costs.  (+info)

1. Heartworms: A parasite that infects the heart and lungs of dogs and cats, causing respiratory problems and potentially leading to heart failure.
2. Tapeworms: A type of parasite that can infect the digestive system of animals, causing weight loss, diarrhea, and other symptoms.
3. Mites: Small, eight-legged parasites that can cause skin irritation and allergic reactions in animals.
4. Lice: Small, wingless parasites that feed on the blood of animals, causing itching and scratching.
5. Hookworms: A type of parasite that can infect the digestive system of animals, causing weight loss, anemia, and other symptoms.
6. Roundworms: A common type of parasite that can infect animals, causing a range of symptoms including diarrhea, vomiting, and weight loss.
7. Ticks: Blood-sucking parasites that can transmit diseases to animals, such as Lyme disease and anaplasmosis.
8. Fleas: Small, wingless insects that feed on the blood of animals, causing itching and scratching.
9. Leishmaniasis: A parasitic disease caused by a protozoan parasite that can infect dogs and other animals, causing skin lesions and other symptoms.
10. Babesiosis: A parasitic disease caused by a protozoan parasite that can infect dogs and other animals, causing fever, anemia, and other symptoms.

Parasitic diseases in animals are often diagnosed through physical examination, laboratory tests, and imaging studies. Treatment options vary depending on the specific disease and the severity of the infection, but may include antiparasitic medications, antibiotics, and supportive care such as fluid therapy and nutritional support. Prevention is key in avoiding parasitic diseases in animals, and this can be achieved through regular deworming and vaccination programs, as well as taking measures to reduce exposure to parasites such as fleas and ticks.

Symptoms of dengue fever typically begin within 2-7 days after the bite of an infected mosquito and can include:

* High fever
* Severe headache
* Pain behind the eyes
* Severe joint and muscle pain
* Rash
* Fatigue
* Nausea
* Vomiting

In some cases, dengue fever can develop into a more severe form of the disease, known as dengue hemorrhagic fever (DHF), which can be life-threatening. Symptoms of DHF include:

* Severe abdominal pain
* Vomiting
* Diarrhea
* Bleeding from the nose, gums, or under the skin
* Easy bruising
* Petechiae (small red spots on the skin)
* Black stools
* Decreased urine output

Dengue fever is diagnosed based on a combination of symptoms, physical examination findings, and laboratory tests. Treatment for dengue fever is primarily focused on relieving symptoms and managing fluid and electrolyte imbalances. There is no specific treatment for the virus itself, but early detection and proper medical care can significantly lower the risk of complications and death.

Prevention of dengue fever relies on measures to prevent mosquito bites, such as using insect repellents, wearing protective clothing, and eliminating standing water around homes and communities to reduce the breeding of mosquitoes. Vaccines against dengue fever are also being developed, but none are currently available for widespread use.

In summary, dengue is a viral disease that is transmitted to humans through the bite of infected mosquitoes and can cause a range of symptoms from mild to severe. Early detection and proper medical care are essential to prevent complications and death from dengue fever. Prevention of dengue relies on measures to prevent mosquito bites and eliminating standing water around homes and communities.

References:

1. World Health Organization. (2020). Dengue and severe dengue. Retrieved from
2. Centers for Disease Control and Prevention. (2020). Dengue fever: Background. Retrieved from
3. Mayo Clinic. (2020). Dengue fever. Retrieved from
4. MedlinePlus. (2020). Dengue fever. Retrieved from

Polyploidy is a condition where an organism has more than two sets of chromosomes, which are the thread-like structures that carry genetic information. It can occur in both plants and animals, although it is relatively rare in most species. In humans, polyploidy is extremely rare and usually occurs as a result of errors during cell division or abnormal fertilization.

In medicine, polyploidy is often used to describe certain types of cancer, such as breast cancer or colon cancer, that have extra sets of chromosomes. This can lead to the development of more aggressive and difficult-to-treat tumors.

However, not all cases of polyploidy are cancerous. Some individuals with Down syndrome, for example, have an extra copy of chromosome 21, which is a non-cancerous form of polyploidy. Additionally, some people may be born with extra copies of certain genes or chromosomal regions due to errors during embryonic development, which can lead to various health problems but are not cancerous.

Overall, the term "polyploidy" in medicine is used to describe any condition where an organism has more than two sets of chromosomes, regardless of whether it is cancerous or non-cancerous.

There are several different types of malaria, including:

1. Plasmodium falciparum: This is the most severe form of malaria, and it can be fatal if left untreated. It is found in many parts of the world, including Africa, Asia, and Latin America.
2. Plasmodium vivax: This type of malaria is less severe than P. falciparum, but it can still cause serious complications if left untreated. It is found in many parts of the world, including Africa, Asia, and Latin America.
3. Plasmodium ovale: This type of malaria is similar to P. vivax, but it can cause more severe symptoms in some people. It is found primarily in West Africa.
4. Plasmodium malariae: This type of malaria is less common than the other three types, and it tends to cause milder symptoms. It is found primarily in parts of Africa and Asia.

The symptoms of malaria can vary depending on the type of parasite that is causing the infection, but they typically include:

1. Fever
2. Chills
3. Headache
4. Muscle and joint pain
5. Fatigue
6. Nausea and vomiting
7. Diarrhea
8. Anemia (low red blood cell count)

If malaria is not treated promptly, it can lead to more severe complications, such as:

1. Seizures
2. Coma
3. Respiratory failure
4. Kidney failure
5. Liver failure
6. Anemia (low red blood cell count)

Malaria is typically diagnosed through a combination of physical examination, medical history, and laboratory tests, such as blood smears or polymerase chain reaction (PCR) tests. Treatment for malaria typically involves the use of antimalarial drugs, such as chloroquine or artemisinin-based combination therapies. In severe cases, hospitalization may be necessary to manage complications and provide supportive care.

Prevention is an important aspect of managing malaria, and this can include:

1. Using insecticide-treated bed nets
2. Wearing protective clothing and applying insect repellent when outdoors
3. Eliminating standing water around homes and communities to reduce the number of mosquito breeding sites
4. Using indoor residual spraying (IRS) or insecticide-treated wall lining to kill mosquitoes
5. Implementing malaria control measures in areas where malaria is common, such as distribution of long-lasting insecticidal nets (LLINs) and indoor residual spraying (IRS)
6. Improving access to healthcare services, particularly in rural and remote areas
7. Providing education and awareness about malaria prevention and control
8. Encouraging the use of preventive medications, such as intermittent preventive treatment (IPT) for pregnant women and children under the age of five.

Early diagnosis and prompt treatment are critical in preventing the progression of malaria and reducing the risk of complications and death. In areas where malaria is common, it is essential to have access to reliable diagnostic tools and effective antimalarial drugs.

Some common types of fish diseases include:

1. Bacterial infections: These are caused by bacteria such as Aeromonas, Pseudomonas, and Mycobacterium. Symptoms can include fin and tail rot, body slime, and ulcers.
2. Viral infections: These are caused by viruses such as viral hemorrhagic septicemia (VHS) and infectious hematopoietic necrosis (IHN). Symptoms can include lethargy, loss of appetite, and rapid death.
3. Protozoan infections: These are caused by protozoa such as Cryptocaryon and Ichthyophonus. Symptoms can include flashing, rapid breathing, and white spots on the body.
4. Fungal infections: These are caused by fungi such as Saprolegnia and Achlya. Symptoms can include fuzzy growths on the body and fins, and sluggish behavior.
5. Parasitic infections: These are caused by parasites such as Ichthyophonus and Cryptocaryon. Symptoms can include flashing, rapid breathing, and white spots on the body.

Diagnosis of fish diseases is typically made through a combination of physical examination, laboratory tests, and observation of the fish's behavior and environment. Treatment options vary depending on the type of disease and the severity of symptoms, and can include antibiotics, antifungals, and medicated baths. Prevention is key in managing fish diseases, and this includes maintaining good water quality, providing a balanced diet, and keeping the fish in a healthy environment.

Note: The information provided is a general overview of common fish diseases and their symptoms, and should not be considered as professional medical advice. If you suspect your fish has a disease, it is recommended that you consult with a veterinarian or a qualified aquarium expert for proper diagnosis and treatment.

... insect population dynamics Population cycle Population dynamics of fisheries Population ecology Population genetics Population ... See also exponential population growth and logistic population growth. Population dynamics overlap with another active area of ... Population dynamics is the type of mathematics used to model and study the size and age composition of populations as dynamical ... The beginning of population dynamics is widely regarded as the work of Malthus, formulated as the Malthusian growth model. ...
Density-dependent: Affect a population more or less as the population is bigger. Examples: A bigger population may be more ... The population dynamics of pest insects is a subject of interest to farmers, agricultural economists, ecologists, and those ... A bigger population may have more intraspecific competition, while a smaller population may have more interspecific competition ... If it's greater than 1, the population is increasing. In a stable population the replacement rate should hover close to 1. We ...
... where populations are modelled and future population dynamics are projected. In population ecology and economics, the maximum ... Population dynamics describes the ways in which a given population grows and shrinks over time, as controlled by birth, death, ... The population size (usually denoted by N) is the number of individual organisms in a population. The effective population size ... Ne is usually less than N (the absolute population size). Small population size results in increased genetic drift. Population ...
Population dynamics; causes and consequences of world demographic change (1965) Sociological concepts and research; acquisition ... Thailand's population; facts, trends, problems, and policies (1971) "Ralph Thomlinson Obituary". Legacy.com. San Francisco ... analysis, and interpretation of social information (1965) Demographic problems; controversy over population control (1967) ...
"Population dynamics; birth, death and migration per region". Retrieved 8 September 2022. Helft Nederlanders is kerkelijk of ... As of 1 January 2020, Zeeland has a population of 383,519 and a population density of 215/km2 (560/sq mi). It is the least ... In some areas, the population can be two to four times higher during the high summer season. The coat of arms of Zeeland shows ... Its capital is Middelburg with a population of 48,544 as of November 2019, the largest municipality in Zeeland is Terneuzen ( ...
Population density Population distribution Population dynamics Population dynamics of fisheries Population genetics Population ... Population ecology is a sub-field of ecology that deals with the dynamics of species populations and how these populations ... The development of population ecology owes much to the mathematical models known as population dynamics, which were originally ... If plant populations change, then the population of all species would be impacted. For example, if plant populations decreased ...
ISBN 978-1-139-49425-0. "Population dynamics; birth, death and migration per region: Municipality 's-Gravenhage". StatLine. ... 2013 - Population: 505,856 municipality. 2014 March: International 2014 Nuclear Security Summit held in city. Population: ... Population: 463,826. 2004 - Police raid a safehouse of terrorist organization Hofstad Network. 2006 - The Hague Jazz fest ... 1919 - Population: 359,610. 1921 - Asta cinema opens. 1922 15 June: Museum Bredius founded. 22 July: International Permanent ...
"Population dynamics; birth, death and migration per region: Municipality Leiden". StatLine. Statistics Netherlands. 2014. ... Population: 56,044. 1919 - Population: 61,408. 1923 - Jan van Houtbrug [nl] (bridge) built. 1925 - St. Joseph, Leiden (Roman ... Population: 119,800 municipality. 2017 - Asian Library opened by Queen Máxima of the Netherlands. Leiden history History of ... 1640 - Population: 100,000. (estimate) 1641 - Laecken-Halle (cloth hall) built. 1648 - Leiden Guild of Saint Luke established. ...
"Population dynamics; month and year". Centraal Bureau voor de Statistiek. "Focus migration - country profile - Netherlands". ... "Population counter". Cbs.nl. Retrieved 5 October 2017. "Netherlands Population 2019", World Population Review Note: Crude ... As average population is an estimate of the population in the middle of the year and not end of the year. "Syria Population - ... As the Dutch population ages, the proportion of people of working age, as a percentage of the entire population, decreases. ...
"Population dynamics; birth, death and migration per region: Municipality Utrecht". StatLine. Statistics Netherlands. 2014. " ... 1950 - Population: 193,190. 1954 - Oudenrijn (section) and Zuilen become part of city.[citation needed] 1960 - Population: ... 1919 - Population: 138,334. 1921 - Centraal Museum established. 1924 - Rietveld Schröder House built in the De Stijl design ... 2000 - Population: 233,667. 2001 - Vleuten-De Meern becomes part of city.[citation needed] 2002 - Regio Randstad regional ...
ISBN 978-90-6450-347-4. "Population dynamics; birth, death and migration per region: Municipality 's-Hertogenbosch". StatLine. ... 2000 - Population: 129,034 municipality. 2005 - Brabants Historisch Informatie Centrum [nl] established. 2013 - Population: ... 1919 - Population: 38,067. 1925 - Centraal Noordbrabants Museum [nl] opens on Bethaniëstraat [nl]. 1926 - Sportpark De Hooge ... 1853 - Theatre built on the Papenhulst [nl]. 1866 - Population: 24,201. 1868 - 's-Hertogenbosch railway station opens. 1874 - ' ...
"Population dynamics; birth, death and migration per region". Retrieved 8 September 2022. (in Dutch) Bevolkingsontwikkeling; ... the province of Groningen had a population of 582,640 and a population density of 196.8/km2 (510/sq mi), which make it the 9th ... As of February 2020, Groningen had a population of 586,309 and a total area of 2,960 km2 (1,140 sq mi). Historically the area ... On 1 January 2013, 92.2% of the total provincial population was born in the Netherlands; and of the 7.8% that was born abroad, ...
"Population dynamics; month and year". opendata.cbs.nl. "Structure of the Population". www.ibz.rrn.fgov.be. "Estimated ... "Preliminary population statistics". www.stat.fi. "Population". ssb.no. "Stock of population in the SR on 31st December 2021". ... "World Population Prospects 2022". population.un.org. United Nations Department of Economic and Social Affairs, Population ... past and future population List of countries by population in 2000 List of countries by population in 2010 List of population ...
... specifically in referencing his theory of natural selection and population dynamics, which discusses how populations of a ... "Population Dynamics , e-cology". sites.nicholas.duke.edu. Retrieved 2017-12-08. Mayr, Ernst. "Darwin's Influence on Modern ... Law and Diekmann developed a framework called adaptive dynamics, which assumes that changes in plant or animal populations in ... and population interaction in this technical introduction to population ecology." He also had a vast interest in limnology, due ...
ISBN 978-90-6450-347-4. "Population dynamics; birth, death and migration per region: Municipality Haarlem". StatLine. ... Population: 158,291 municipality. 1995 - Jaap Pop becomes mayor. 2000 - Population: 148,484 municipality. 2003 - Toneelschuur ... 2013 - Population: 153,093 municipality. Haarlem history History of Haarlem [nl] List of mayors of Haarlem [nl] List of ... 1577 - Population: 18,000 (approximate). 1587 - Haarlem Academy of art established. 1592 - Lieven de Key appointed city ...
... and the evolutionary changes affect population dynamics. Eco-evolutionary dynamics are also evident at the community level. ... Population dynamics are also affected by the landscape of the environment a species lives in. The landscape can influence the ... When population dynamics are affected by the variation in heritable traits, within a few generations it can change the strength ... An example of eco-evolutionary dynamics in populations and communities is when two species interact. In a predator-prey system ...
"Maldives' Population Dynamics". Archived from the original on 14 January 2021. Retrieved 1 February 2019. "International Labour ... The population doubled by 1978, and the population growth rate peaked at 3.4% in 1985. At the 2006 census, the population had ... "Islands by Population Size and Percentage Share of Total Population". Maldives: Population and Housing Census 2006. Ministry of ... The population was projected to have reached 317,280 in 2010. The 2014 Population and Housing Census listed the total ...
Population dynamics; 6) Inequality & Group Disparities; 7) Methodology. Zajacova, Anna, and Sarah Burgard. 2013. "Healthier, ... The Michigan Population Studies Center is a demography center in the United States, with an extensive record in both domestic ... The PSC comprises independent population researchers who pursue their own agendas with the support of the PSC staff. A large ... The Population Studies Center provides apprenticeship training and fellowship support to graduate students in Sociology, ...
Population - See stock. Population dynamics - The study of fish populations and how fishing mortality, growth, recruitment, and ... See population dynamics. Socioeconomics - A word used to identify the importance of factors other than biology in fishery ... Virtual population analysis (VPA) - an analysis of fish population numbers that uses the number of fish caught at various ages ... Population model - a hypothesis of how a population functions. It often uses mathematical descriptions of growth, recruitment ...
... population dynamics. 1991-2020. Source: Statistics Greenland Wikimedia Commons has media related to ... Its population was 345 as of 2020 and has been described as one of the most remote settlements on earth. The former name ... Before that, the area itself had been home to a dense population of Inuit in the past, as testified by ruins and other ... The population of Ittoqqortoormiit has fluctuated over the past three decades, decreasing about 35% since 2006. ...
Ecological trap Perceptual trap Conservation biology Ecology Landscape ecology Metapopulation Population dynamics Population ... it is even possible that the majority of the population resides in the sink. The source-sink model of population dynamics has ... Source-sink dynamics has also been incorporated into studies of metapopulations, a group of populations residing in patches of ... Frouz J, Kindlmann P (2001). "The role of sink to source re-colonisation in the population dynamics of insects living in ...
Ranade, Prabha Shastri (1990). Population dynamics in India. page 35. ISBN 9788170243076. Retrieved 20 March 2013. Damayanti ...
Population Dynamics in India. South Asia Books, 1990, p. 37. [1] DistancesTo.com - Rajura] "Census of India 2001: Data from the ... Census of India 2001, Table - 3 : Population, population in the age group 0-6 and literates by sex - Cities/Towns (in ... The town has an average elevation of 189 metres (624 feet). According to the 2021 Indian census, Rajura had a population of ... Children under age six constitute about 15 percent of the population. Rajura's average literacy rate of 72 percent (77 percent ...
Dynamics of Population. Ed. P.J. Den Boer and G.R. Gradwell. Wageningen: Pudoc, 1970. Carson, Walter A. and Stefan A. Schnitzer ... Joseph Connell published his hypothesis in 1970 in Dynamics of Populations. Unlike Janzen, Connell proposed experiments that ... Clark, Deborah A.; Clark, David B. (1984). "Dynamics of a Tropical Rain Forest Tree: Evaluation of the Janzen-Connell Model". ... Plant pathogens follow infectious disease dynamics. The basic reproductive rate ( R 0 ) {\displaystyle (R_{0})} of a disease is ...
Newman, W.T.; Sagan, C. (1981). "Galactic civilizations: Population. dynamics and interstellar diffusion". Icarus. 46 (3): 293- ... A significant fraction of the population believes that at least some UFOs (Unidentified Flying Objects) are spacecraft piloted ... According to his model, possible outcomes of climate change include gradual population decline until an equilibrium is reached ... have suggested that population pressure is not . . . " Archived April 11, 2019, at the Wayback Machine. Wall, Mike (October 26 ...
Cousens, Roger; Mortimer, Martin (1995). Dynamics of Weed Populations. Cambridge: Cambridge University Press. ISBN 978-0-521- ... They interact with their neighbours at a variety of spatial scales in groups, populations and communities that collectively ... ISBN 978-0-7506-4636-9. Small, Michael (2012). Dynamics of Biological Systems. Boca Raton, FL: CRC Press. ISBN 978-1-4398-5336- ... Some otherwise sterile plant polyploids can still reproduce vegetatively or by seed apomixis, forming clonal populations of ...
... methodological development and contribution to study microbial and faunal populations; diversity and population dynamics; ... Soil biology involves work in the following areas: Modelling of biological processes and population dynamics Soil biology, ... occurrence of physicochemical parameters and surface properties on biological processes and population behavior Population ... However, we find that we don't understand critical aspects about how these populations function and interact. The discovery of ...
Population Dynamics Research Centers. December 2021. Retrieved 1 July 2022. Muglu, Javaid; Rather, Henna; Arroyo-Manzano, David ... In 2010, African Americans represented 4 percent of Washington State's population but 20 percent of the prison population. ... of the population. In Washington, D.C., black people make up 46% of the population but composed 72% of the people stopped even ... Also, when they were left alone on the farm they became targets of the men who contributed to the rise in the population of ...
Clark, John (1970-03-27). "Population dynamics of Leptomeryx". Fieldiana Geology. 16 (16): 411-451. Retrieved 2014-04-20. v t e ...
Ranade, Prabha Shastri (1990). Population dynamics in India. page 35. ISBN 9788170243076. Retrieved 20 March 2013. "IR History ...
Additionally, bacterial populations absorb nitrogen and phosphorus compounds as they pass by in the water stream and keep these ... "Beaver-mediated water table dynamics in a Rocky Mountain fen". Ecohydrology. 11 (2): e1923. doi:10.1002/eco.1923. ISSN 1936- ... Beaver dams have been shown to be beneficial to frog and toad populations, likely because they provide protected areas for ... By stimulating the growth of species of plants that are critical to populations of songbirds in decline, beaver dams help ...
The Assyrian population prior to the genocide amounted to about 500,000-600,000 people and the generally accepted estimate is ... Bedford, Peter R. (2009). "The Neo-Assyrian Empire". In Morris, Ian; Scheidel, Walter (eds.). The Dynamics of Ancient Empires: ... The surviving evidence suggests that the number of slaves in Assyria never reached a large share of the population. In the ... In the Old Assyrian period, a major portion of Assur's population was involved in the city's international trade. As can be ...
As well, the population in general seemed to have a favorable attitude towards reform, be it Protestant or Anabaptist. Jörg ... Karl Peter: The Dynamics of Hutterite Society: An Analytical Approach, Edmonton, Alberta, 1987. ISBN 9780888641083 Rod Janzen ... When the colony's population grows near the upper limit and its leadership determines that branching off is economically and ... The approximate U.S. population of Brethren was 11,000 in 2018. Hutterite colonies have existed in the rural farming areas of ...
The majority of the population belongs to one of many Holds, which are similar to principalities or duchies. Pern is at the ... The parallels between the gameplay dynamics of the two games are striking, but existing sources do not record whether or not ...
... stand dynamics, and a series of biophysical indicators of non-timber values. Projection of stand growth and ecosystem dynamics ... and population, community and ecosystem processes. However, the model can be simplified to any desired level of complexity that ... FORECAST is a management-oriented, stand-level, forest-growth and ecosystem-dynamics model. The model was designed to ... multi age cohort ecosystem-level application with population, community and ecosystem processes represented with light, ...
Moore, Christopher M.; Catella, Samantha A.; Abbott, Karen C. (2017-02-13). "Population dynamics of mutualism and intraspecific ... and populations tend to have cooperative or mutualistic behaviors. If populations have a competitive behaviour in hostile ... so competition is affordable for populations. Also competition could select populations to have R behaviour in a positive ... This abundance or excess of resources, causes animal populations to have R reproduction strategies (many offspring, short ...
The current population makes up 2.8% of the UK's population (67 million) and 27% of the island of Ireland's population (7.03 ... p. 43.; Ruane, Joseph (1996). The Dynamics of Conflict in Northern Ireland: Power, Conflict and Emancipation. Cambridge ... In 2021, its population was 1,903,100, making up about 27% of Ireland's population and about 3% of the UK's population. The ... The population of Northern Ireland has risen yearly since 1978. The population at the time of the 2021 census was 1.9 million, ...
Woehr, David J.; Arciniega, Luis M.; Lim, Doo H. (February 2007). "Examining Work Ethic Across Populations: A Comparison of the ... Tran, Timothy; Blackman, Melinda C. (April 2006). "The Dynamics and Validity of the Group Selection Interview". The Journal of ...
Researchers have also investigated attachment system dynamics as a predictor of the religious conversion experience throughout ... influencing the current forms of knowledge and worldviews that are operative in a population. This activity is the functioning ... are frequently found in the general population. This supports the idea that psychotic symptoms likely lie on a continuum." ... and is thought to reflect the role of group dynamics in religious identification. Many studies regarding religion and prejudice ...
The population estimate shown is automatically calculated daily at 00:00 UTC and is based on data obtained from the population ... Weshah Razzak (February 2014). "New Zealand Labour Market Dynamics: Pre- and Post-global Financial Crisis" (PDF). New Zealand ... "Population aging in New Zealand". Statistics New Zealand. "Brian Gaynor: NZ badly behind times with age pensions". The New ... The Government has two plans to bring Ultra-Fast Broadband to 97.8% of the population by 2019, and is spending NZ$1.35 billion ...
India, with its large population, reports the highest number of dowry related deaths in the world according to Indian National ... doi:10.1111/j.0022-2445.2004.00081.x. Krishnaswamy, Saroja (1995). "Dynamics of personal and social factors influencing the ... India grants its Muslim population the Sharia derived personal status laws). Despite the new inheritance law, dowry has ... Section 498A and the Dynamics of Acquittals". Economic & Political Weekly. 44 (52). Dhulia, Virag (6 July 2014). "Supreme Court ...
... special issue editor of European Journal of Population (Special Issue on Family Dynamics and Children's Life Chances with ... Population Studies 62(3):273-88. Härkönen, J., H. Kaymakcalan, P. Mäki & A. Taanila. 2012. Prenatal health, educational ... Some of his research interests include: Life course research Causes and consequences of family dynamics and structure Social ... and of Florence Population Studies (FloPS). Härkönen holds a PhD in political and social sciences (2007) and a Master of ...
It also led to a decrease in cost of transportation and an increase in population in the area; which is still increasing up to ... "Improved Access Roads Change Social and Business Dynamics in Nigeria's Kaduna State". World Bank. Retrieved 2018-12-10. " ...
"Dynamic energy budget representations of stoichiometric constraints on population dynamics" (PDF). Ecology. 85 (5): 1230-1243. ... The basis of trophic dynamics is the transfer of energy from one part of the ecosystem to another. The trophic dynamic concept ... Population structure, migration rates, and environmental refuge for prey are other possible causes for pyramids with biomass ... Monographs in Population Biology. Vol. 11. Princeton, NJ: Princeton University Press. pp. xv+1-190. ISBN 978-0-691-08202-8. ...
... and considerable reduction of effective population size in endosymbiotic populations, particularly in species that rely on ... Andersson, Jan O.; Andersson, Siv G. E. (2001-05-01). "Pseudogenes, Junk DNA, and the Dynamics of Rickettsia Genomes". ... This process seems to be dominated by genetic drift resulting from small population size, low recombination rates, and high ... Petrov, Dmitri A. (2002-06-01). "Mutational Equilibrium Model of Genome Size Evolution". Theoretical Population Biology. 61 (4 ...
According to census records of 2017, the total population of Sindh is 47.89 million. Around 15% of the Sindhis population has ... www.usip.org/sites/default/files/PW104-Conflict-Dynamics-in-Sindh-Final.pdf[bare URL PDF] Siddiqi, Farhan Hanif (2012). The ...
... elephant population sizes would change much more slowly to changes in resource density than would ant populations. k i − k ^ {\ ... Conversely, high order interactions in communities with many species can lead to complex dynamics following an initially ... As the population of one species declines, individuals of that species tend to compete predominantly with individuals of other ... It assumes that all members within a guild are inherently the same, and that changes in population density are a result of ...
"Population dynamics and culture studies of the edible red alga Callophyllis variegata (Kallymeniaceae)". Phycological Research ... "Population biology and chemical composition of the red alga Callophyllis variegata (Rhodophyta; Cryptonemiales) in southern ...
Under a fellowship from the National Science Foundation, Currey was studying the climate dynamics of the Little Ice Age using ... and in 1963 Currey became aware of a Great Basin Bristlecone Pine population in the Snake Range and on Wheeler Peak in eastern ...
While Christians account for 1% of the total population, Hyderabad is the seat of a diocese of the Church of Pakistan and has ... Hasan, Syed Shoaib; Yusuf, Huma (January 2015). "CONFLICT DYNAMICS IN SINDH" (PDF). Peaceworks. United States Institute of ... The Partition of India resulted in the large-scale exodus of much of the city's Hindu population, though like much of Sindh, ... The vacuum left by the departure of much of the city's Hindu population was quickly filled by the newly arrived Urdu speaking ...
Fazey, Cindy: The Mechanics and Dynamics of the UN System for International Drug Control, 14 March 2003. Fazey, Cindy: The UN ... because existing restrictions on production and export had directly affected large segments of their domestic population and ... Professor Cindy Fazey's The Mechanics and Dynamics of the UN System for International Drug Control explains, "concerted efforts ...
"China's Belt and Road Initiative and Intra-Regional Dynamics in Africa." African Studies Quarterly, vol. 19, no. 3-4, Oct. 2020 ... rising to levels that could threaten the local elephant population. The bulk of the large ivory shipments from Africa to Asia ... this further alienates workers from the local population. In 1972, the International Institute for Strategic Studies (IISS) ... link between Chinese demand and Tanzanian supply is the single most destructive influence on the African elephant population: ...
It is also an ethnic term for the native population who initiated the kingdom of Kush. The term is also displayed in the names ... Dynamics and Organisation of Textile Production in Past Societies in Europe and the Mediterranean. Vol. 31. pp. 81-92. ... found that they displayed traits similar to those of populations inhabiting the Nile, Horn of Africa, and Maghreb. Traits from ...
Hesp, Patrick (2002). "Foredunes and blowouts: initiation, geomorphology and dynamics" (PDF). Geomorphology. 48: 245-268. doi: ... land managers could sustain a healthy native vegetation population and thus transform the landscape back to its native habitat ...
They provided explicit solutions to a class of mean-field-type games with non-linear state dynamics and or non-quadratic cost ... To improve efficiency, he suggested private portion of the field to be shared depending on the needs of the local population. ... His conclusion was to base the entire project on a significant participation of the local population. The evidence from these ... His thesis was entitled 'Population Games with Networking Applications' and was supervised by Eitan Altman and Rachid El-Azouzi ...
... director of the Population Aging Research Center (1998-99), and director of the Population Studies Center (1998-2005), and ... in economics from the Massachusetts Institute of Technology in 1966 for a thesis on the dynamics of the supply of crops in ... Profile of Jere Behrman at the Population Studies Center. Retrieved February 23rd, 2018. Curriculum vitae of Jere Behrman from ... At the University of Pennsylvania, Behrman additionally serves as an associate director of the Population Aging Research Center ...
All that a monarchy requires to remain in power is, first, for the population to be afraid of the monarch; and second, that the ... "laws of social dynamics", which would describe how and when one form of power changes into another. (Russell 1938:4-6) As a ... Contra Hobbes, no monarchy can be said to arise from a social contract within the wide population. Moreover, if a monarchy is ... Rather, the police are regarded as instruments of a legitimate institution by some population, and the organisation depends ...
Duineveld, G.C.A.; Van Noort, G.J. (1986). "Observations on the population dynamics of Amphiura filiformis (ophiuroidea: ... it was considered that this did not have a significant effect on the population size. Amphiura filiformis has been used as a ...
Cities tended to draw more prostitutes due to the sheer size of the population and the institutionalization of prostitution in ... April 2004). "Transactional sex is the driving force in the dynamics of HIV in Accra, Ghana". AIDS. 18 (6): 917-25. doi:10.1097 ... During this period, prostitution was also very prominent in the Barbary Coast, San Francisco as the population was mainly men, ... "Changing Patterns of Intimacy among Young People in Africa." African Dynamics in a Multipolar World (2013): 29-47. " ...
... tracing techniques allow the detailed descriptions of neuronal projections from a single neuron or a defined population of ... accumulation in time-lapse images provides detailed information not only about neuronal circuitry but also about the dynamics ...
Here we show that inbreeding depression strongly influences the population dynamics of an endangered killer whale population, ... Genetic factors such as inbreeding depression can also affect population dynamics but these effects are rarely measured in the ... Our population models suggest that this inbreeding depression limits population growth and predict further decline if the ... The Southern Residents also had more inferred homozygous deleterious alleles than three other, growing, populations, further ...
1970)‎. Health aspects of population dynamics. WHO Regional Office for the Western Pacific. ... Health aspects of population dynamics. View/. Open. WPR_RC021_07_Population_Dynamics_1970_en.pdf (‎142.5Kb)‎ ...
R. S. Cantrell and C. Cosner, The effects of spatial heterogeneity in population dynamics, J. Math. Biol., 29 (1991), 315-338. ... Lyapunov type inequalities for Hammerstein integral equations and applications to population dynamics ... K. Q. Lan and W. Lin, Population models with quasi-constant-yield harvest rates, Math. Biosci. Eng., 14 (2017), 467-490. doi: ... W. Ding, H. Finotti, S. Lenhart, Y. Lou and Q. Ye, Optimal control of growth coefficient on a steady-state population model, ...
1969)‎. SEA/RC22/R7 - Health Aspects of Population Dynamics. WHO Regional Office for South-East Asia. https://extranet.who.int/ ...
CGD co-sponsored a Policy Roundtable on Economic Development and Population Dynamics. The roundtable brought together leading ... CGD co-sponsored a Policy Roundtable on Economic Development and Population Dynamics. The roundtable brought together leading ... Cynthia Lloyd, Population Council. Geeta Rao Gupta, International Center for Research on Women. Edward Addai, Ministry of ... Alex Ezeh, African Population and Health Research Center. Peter Heller, Financial Affiars Department, International Monetary ...
Rooted in detailed stellar population analysis, we are constantly exploring and developing new tools and ideas to understand ... Stellar population synthesis models *Development of new stellar population synthesis models. *Stellar population analysis tools ... The final product of galaxy evolution through cosmic time is the population of galaxies in the local universe. These galaxies ... Detection of young stellar populations in apparently quenched low-mass galaxies using red spectral line indices. de Lorenzo- ...
Dynamic Population. Vocabulary : Population : All the individuals of a species that live together in an area . Demography : The ... statiscal study of populations , make predictions about how a population will change . Slideshow 1891186 by winter ... Population Dynamics - . population dynamics outline. characteristics of a population population dynamics and carrying ... Population Dynamics - . population dynamics. review: what is a population?. group of organisms of the same species that ...
Population-Based Geospatial and Molecular Epidemiologic Study of Tuberculosis Transmission Dynamics, Botswana, 2012-2016 Nicola ... Population-Based Geospatial and Molecular Epidemiologic Study of Tuberculosis Transmission Dynamics, Botswana, 2012-2016. ... social gathering venues for population-based geospatial and molecular epidemiologic study of tuberculosis transmission dynamics ...
Populati-on†. Size, km2. Population density†. No. enrolled TB patients. No. who had TB (95% CI)‡. No. (%) enrolled HIV-positive ... Population-Based Geospatial and Molecular Epidemiologic Study of Tuberculosis Transmission Dynamics, Botswana, 2012-2016 Nicola ... Population-Based Geospatial and Molecular Epidemiologic Study of Tuberculosis Transmission Dynamics, Botswana, 2012-2016. ... Based 2011 Population and Housing Census. Statistics Botswana. ‡TB incidence/100,000 persons; 95% CIs assume a Poisson ...
Monitoring tree-level insect population dynamics with multi-scale and multi-source remote sensing. 2008. Wulder, M.A.; Ortlepp ... Long-term monitoring of the rate-of-change of mountain pine beetle (Dendroctonus ponderosae Hopkins) populations requires ...
... extrapolations of overall prevalence rates may correlate with that of the general population. ... ANC-based data might draw a rather distorted picture of current dynamics of the HIV epidemic. Even though representing an ... Studying dynamics of the HIV epidemic: population-based data compared with sentinel surveillance in Zambia AIDS. 1998 Jul 9;12( ... Objectives: To establish population-based HIV survey data in selected populations, and to assess the validity of extrapolation ...
Population dynamics of galeate acritarchs at the Cambrian-Ordovician transition in the Algerian Sahara. Palaeontology, 47, 2, ... Article: Population dynamics of galeate acritarchs at the Cambrian–Ordovician transition in the Algerian Sahara. ... The populations of galeate acritarchs from the Cambrian-Ordovician transition section in borehole Nl-2 of the Algerian Sahara ...
MIKROBIELLE INFEKTIONSKRANKHEITEN (MEDIZIN); ANTIBIOTIKA- UND BIOZIDRESISTENTE MIKROORGANISMEN (MIKROBIOLOGIE); KRANKENHYGIENE + KRANKENHAUSHYGIENE; ARZNEIMITTELRESISTENZ GEGEN MEHRERE ARZNEIMITTEL (PHARMAKOLOGIE); MICROBIAL INFECTIOUS DISEASES (MEDICINE); MICROORGANISMS RESISTANT TO ANTIBIOTICS AND BIOCIDES (MICROBIOLOGY); PATIENTS HYGIENE + HOSPITAL HYGIENE; MULTIDRUG RESISTANCE (PHARMACOLOGY ...
Only largemouth bass nine inches or longer were tagged so population estimates include only that portion of the population. In ... According to various measurements, 1958 began with a high predator population and a low forage population. Few schools of shad ... The average length of bass captured by electro-fishing increased each succeeding year, indicating a population of larger bass ... 1958, black bass numbers reached an all-time high, but late that year the population began a decline which continued throughout ...
Age determination is one of the most important objectives in the study of fish population dynamics, and from this information ... Also, the determination of age allows studying the growth or the biomass increase of the population and the study of mortality ... Manual of methods of fish population analysis. FAO Fish. Tech. Paper 40: 1 60. [ Links ]. ... Recruitment length is 16 cm, and the period with greater recruitment of adult population happens during April and August. ...
Here, we focus on the ubiquitous situation where the eco-evolutionary dynamics of fluctuating populations is shaped by the ... Population dynamics traditionally ignores fluctuations and considers static and homogeneous environments. However, fluctuations ... In particular, modelling population of varying size and composition subject to changing external factors is crucial to ... When antibiotics reduce a large population to a very small one but fail to eradicate it, surviving cells may replicate and ...
Past climate changes, population dynamics and the origin of Bison in Europe. During the last 50,000 years in Europe, Bison have ... Past climate changes, population dynamics and the origin of Bison in Europe. OPEN ACCESS ALTMETRIC ... In this podcast, Eva-Maria Geigl discusses her research on past climate changes, population dynamics and the origin of bison in ... DNA analysis has allowed Eva-Maria Geigl and her team to retrace the population dynamics that took place regarding migration ...
Corn earworm population dynamics. Posted on 12-September, 2022. by greenje , Leave a reply ... H. zea population dynamics are hierarchically structured with continental-level effects that are partitioned into three ... 2022). "Pest population dynamics are related to a continental overwintering gradient." Proceedings of the National Academy of ... predicting when populations accumulate in one region can inform synchronous or lagged population development in other regions. ...
Population dynamics of agouti and albino meadow voles in high-quality, grassland habitats. / Peles, J. D.; Lucas, M. F.; ... Population dynamics of agouti and albino meadow voles in high-quality, grassland habitats. Journal of Mammalogy. 1995 Jan 1;76( ... Peles, J. D. ; Lucas, M. F. ; Barrett, G. W. / Population dynamics of agouti and albino meadow voles in high-quality, grassland ... Peles, J. D., Lucas, M. F., & Barrett, G. W. (1995). Population dynamics of agouti and albino meadow voles in high-quality, ...
The limit model consists of an ordinary-differential equation ruling the dynamics of the first (slow) compartment, coupled with ... population affects the rates of individual birth, migration and death events. Using the slow-fast property of the model, we ... migration and death stochastic process modeling the dynamics of a finite population, in which individuals transit ... Averaging of a stochastic slow-fast model for population dynamics: application to the development of ovarian follicles. SIAM ...
... immigration by swans from other breeding areas may be important for sustaining a breeding population of tundra swans on and ... and annual rates of apparent adult survival were lower and more variable than previously observed for other swan populations ...
Mitochondrial DNA patterns in the Iberian Northern plateau: Population dynamics and substructure of the zamora province. In: ... Mitochondrial DNA patterns in the Iberian Northern plateau: Population dynamics and substructure of the zamora province. ... Mitochondrial DNA patterns in the Iberian Northern plateau: Population dynamics and substructure of the zamora province. / ... Dive into the research topics of Mitochondrial DNA patterns in the Iberian Northern plateau: Population dynamics and ...
TextPublication details: New Delhi : Sage, 1989. Description: 382 pISBN: 8170361575Subject(s): Women , Population dynamics , ... HQ 1726 89WO Women and population dynamics : HQ 1726 99DI Asie : HQ 1726.5 84SO Social science research and women in the Arab ... Women and population dynamics : perspectives from Asian countries / edited by K. Mahadevan. Contributor(s): Mahadevan, Kuttan ...
Session H35: Population and Evolutionary Dynamics III. 2:30 PM-5:30 PM, Tuesday, March 15, 2016. Room: 338. Sponsoring Units: ...
aegypti population dynamics. A number of detail-rich models have been developed to couple the dynamics of the immature and ... aegypti population dynamics and the impact of insecticide spraying to kill adult mosquitoes. The baseline abundance predicted ... Fusing an agent-based model of mosquito population dynamics with a statistical reconstruction of spatio-temporal abundance ...
Understanding the behavioural drivers of population dynamics in relation to resource pulses can provide important insights into ... We take a population-level approach to determine how resource pulses, in this case a temporary hyper-abundance of prey, ... yet the manner in which carnivore populations respond to spatial and temporal fluctuations of resources remains unclear. ... Resource pulses influence the spatio-temporal dynamics of a large carnivore population ...
  • Demography: The statiscalstudy of populations, make predictions about how a populationwillchange. (slideserve.com)
  • In fact, pharmacodynamics largely focuses on the deterministic description of large well-mixed bacterial populations, but fails to account crucial stochastic effects arising in small communities. (ukri.org)
  • Bacterial population dynamics in dairy waste during aerobic and anaerobic treatment and subsequent storage. (cdc.gov)
  • In particular, modelling population of varying size and composition subject to changing external factors is crucial to understand the evolution of microbial antibiotic resistance. (ukri.org)
  • When antibiotics reduce a large population to a very small one but fail to eradicate it, surviving cells may replicate and restore infections, and these survivors are likely to develop antibiotic resistance. (ukri.org)
  • 2022). "Pest population dynamics are related to a continental overwintering gradient. (oregonstate.edu)
  • Realistic levels of inbreeding depression strongly affect extinction risk in wild populations. (nature.com)
  • As applications of these inequalities for nonlinear ODEs, we obtain extinction criteria and optimal locations of favorable habitats for populations inhabiting one dimensional heterogeneous environments governed by reaction-diffusion equations with spatially varying growth rates and external forcing. (aimsciences.org)
  • Owing to the small population size, the details of the outcome are subject to large fluctuations.This important example clearly illustrates the need for theoretical advances to shed light on extinction and resistance scenarios in fluctuating environments. (ukri.org)
  • During the last 50,000 years in Europe, Bison have experienced population expansion, contraction and extinction as a result of environmental and climatic changes. (biomedcentral.com)
  • DNA analysis has allowed Eva-Maria Geigl and her team to retrace the population dynamics that took place regarding migration and extinction. (biomedcentral.com)
  • Shaffer, M. L. Minimum population sizes for species conservation. (nature.com)
  • However, fluctuations arising from randomly occurring birth / death events (demographic noise) and the change of environmental conditions (environmental variability), together with the spatial dispersal of species, play a crucial role in understanding how the size and composition of a population jointly evolve in time, i.e. its eco-evolutionary dynamics. (ukri.org)
  • Rates of productivity (egg, nest, cygnet survival) and annual rates of apparent adult survival were lower and more variable than previously observed for other swan populations and species. (alaska.edu)
  • Moreover, a complex population genetic structure was identified within LAm A clade supporting multiple monophylogenetic species, which could be driven by rapid host or environmental adaptation (~0.5 MYA). (nau.edu)
  • Conclusions/Significance: At least six new phylogenetic species are proposed in the Histoplasma species complex supported by different phylogenetic and population genetics methods, comprising LAm A1, LAm A2, LAm B1, LAm B2, RJ and BAC-1 phylogenetic species. (nau.edu)
  • We analyze a birth, migration and death stochastic process modeling the dynamics of a finite population, in which individuals transit unidirectionally across successive compartments. (hal.science)
  • the whole (or part of the) population affects the rates of individual birth, migration and death events. (hal.science)
  • Peacebuilding, Migration & Development investigates the shifting needs of precarious populations both in a local context and for those who traverse global boundaries. (edu.au)
  • Assessments of the dynamics of the HIV/AIDS epidemic in Africa are based largely on sentinel surveillance of antenatal clinic (ANC) attenders. (nih.gov)
  • The Canada-Pakistan HIV/AIDS surveillance project has strengthened and expanded the existing national AIDS control programme surveillance system in Pakistan through a comprehensive estimate of the size and location of some of the most at-risk populations (sex workers and injection drug users) and annual assessments of their sociodemographic characteristics, behaviours and HIV prevalence. (who.int)
  • Population dynamics traditionally ignores fluctuations and considers static and homogeneous environments. (ukri.org)
  • Many of the features of our theoretical models, such as switching environments, time-varying population sizes, public good production, etc. can be reproduced in laboratory experiments. (ukri.org)
  • Fig. 1: Distribution, population structure, inbreeding and demographic history for five North Pacific killer whale populations. (nature.com)
  • Here, we focus on the ubiquitous situation where the eco-evolutionary dynamics of fluctuating populations is shaped by the coupling of demographic noise and environmental variability. (ukri.org)
  • In this new BMC Biology study, Eva-Maria Geigl and her team have sequenced the mitochondrial DNA of 57 specimens to reveal that three populations of bison occupied western Europe in correlation with climate induced environmental changes. (biomedcentral.com)
  • To accomplish this general purpose, mitochondrial DNA variations of 214 individuals from a population located in the Western region of the Iberian Northern plateau (the province of Zamora) were analyzed. (uab.cat)
  • The main aim of this work is to check if recent population movements together with existing boundaries (geographical and administrative) have influenced the current genetic composition of the area. (uab.cat)
  • As a result, the general population is not likely to be exposed to large amounts of methyl parathion. (cdc.gov)
  • Populations living within or very near areas of heavy methyl parathion use would have an increased risk of exposure to large amounts of methyl parathion through dermal contact with contaminated plants, by inhalation of the mist formed from the applied insecticide, or by ingestion of water or food-borne residues. (cdc.gov)
  • Understanding the factors that cause endangered populations to either grow or decline is crucial for preserving biodiversity. (nature.com)
  • 95% CIs assume a Poisson distribution);based on no. cases enrolled from each geography divided by the population estimates for each geography annualized to the duration of study period. (cdc.gov)
  • Only largemouth bass nine inches or longer were tagged so population estimates include only that portion of the population. (seafwa.org)
  • The Southern Residents also had more inferred homozygous deleterious alleles than three other, growing, populations, further suggesting that inbreeding depression affects population fitness. (nature.com)
  • inproceedings{LAM'10:Reconciling_Population_and_Agent, author = {Andrea Bracciali and Jane Hillston and Diego Latella and Mieke Massink}, title = {Reconciling Population and Agent Models for Crowd Dynamics}, booktitle = {LAM'10. (easychair.org)
  • Our population models suggest that this inbreeding depression limits population growth and predict further decline if the population remains genetically isolated and typical environmental conditions continue. (nature.com)
  • A number of detail-rich models have been developed to couple the dynamics of the immature and adult stages of Ae. (bvsalud.org)
  • The result is expressive, as we will show by discussing a few examples, and efficient, by the adoption of the fluid flow analysis techniques, which approximate system dynamics as continuous variations of population. (easychair.org)
  • Fusing an agent-based model of mosquito population dynamics with a statistical reconstruction of spatio-temporal abundance patterns. (bvsalud.org)
  • Genetic factors such as inbreeding depression can also affect population dynamics but these effects are rarely measured in the wild and thus often neglected in conservation efforts. (nature.com)
  • Conservation actions focused only on extrinsic threats may therefore fail to account for key intrinsic genetic factors that also limit population growth. (nature.com)
  • 1990) had reported that prevail because of low level of living standards, helminth parasites were aggregated in human poor environmental sanitation and ignorance of populations so that most individuals have very simple health promoting factors. (who.int)
  • Flukes that cause schistosomiasis, paragonimiasis, fascioliasis, clonorchiasis, and opisthorchiasis are included in the World Health Organization (WHO) list of neglected tropical diseases (NTD) to which interventions for poor and marginalized populations are prioritized given the significant health burden. (medscape.com)
  • CGD co-sponsored a Policy Roundtable on Economic Development and Population Dynamics. (cgdev.org)
  • Because H. zea is a highly migratory pest, predicting when populations accumulate in one region can inform synchronous or lagged population development in other regions. (oregonstate.edu)
  • Our program includes ongoing research on tick populations and tick-borne diseases, as well as a passive surveillance program, where people bring in ticks to us to identify. (cdc.gov)
  • In 1958, black bass numbers reached an all-time high, but late that year the population began a decline which continued throughout the study. (seafwa.org)
  • Conservation efforts often address extrinsic threats, such as environmental degradation and overexploitation, that can limit the recovery of endangered populations. (nature.com)
  • Also, the determination of age allows studying the growth or the biomass increase of the population and the study of mortality or diminution of the biomass. (scielo.org.mx)
  • Age determination is one of the most important objectives in the study of fish population dynamics, and from this information it is possible to get to know the population structure by age groups, longevity, recruitment age, sexual maturity and captures. (scielo.org.mx)
  • Our group at the IAC consists of experienced researchers in cosmological simulations, dynamical studies, stellar populations and morphological properties of galaxies up to high redshift. (iac.es)
  • In addition, the present study guides isolate selection for future population genomics and genome wide association studies in this important pathogen complex. (nau.edu)
  • So we were fortunate to have data available for Monmouth, not only on tick populations in the field and tick infection rates from prior studies, but also on the numbers of ticks people were finding on themselves and bringing in to us. (cdc.gov)
  • Immigration: Movement of individuals into a population. (slideserve.com)
  • DynamicPopulation A population is a group of individuals who live together in the same habitat and are likely to interbreed. (slideserve.com)
  • DynamicPopulation Limited space for territories may often put a cap on the size of bird populations. (slideserve.com)
  • Long-term monitoring of the rate-of-change of mountain pine beetle (Dendroctonus ponderosae Hopkins) populations requires detailed tree-level information over large areas. (gc.ca)
  • These findings suggest that extrapolations from surveillance data may indeed produce a distorted picture of the current dynamics of the HIV epidemic in the population at large. (nih.gov)
  • Fig. 2: Effects of inbreeding on survival to age 40 yr and population growth. (nature.com)
  • Keller, L. F. & Waller, D. M. Inbreeding effects in wild populations. (nature.com)
  • H. zea population dynamics are hierarchically structured with continental-level effects that are partitioned into three geographic zones. (oregonstate.edu)
  • Because of low rates of production and apparent survival, immigration by swans from other breeding areas may be important for sustaining a breeding population of tundra swans on and adjacent to Izembek NWR. (alaska.edu)
  • Each population has a unique physical distribution in time and space. (slideserve.com)
  • The limit model consists of an ordinary-differential equation ruling the dynamics of the first (slow) compartment, coupled with a quasi-stationary distribution in the remaining (fast) compartments, which averages the contribution of the fast component of the Markov chain on the slow one. (hal.science)
  • Methodology/Principal Findings: Increased Histoplasma sampling (n = 234) resulted in the revision of the phylogenetic distribution and population structure using 1,563 aligned nucleotides from four protein-coding regions. (nau.edu)
  • The approach encompasses the agent modelling viewpoint, as system behaviour emerges from the specified agent interaction, and the population modelling viewpoint, when continu- ous analysis is used. (easychair.org)
  • Rooted in detailed stellar population analysis, we are constantly exploring and developing new tools and ideas to understand how galaxies came to be what we now observe. (iac.es)
  • ANC-based data might draw a rather distorted picture of current dynamics of the HIV epidemic. (nih.gov)
  • To establish population-based HIV survey data in selected populations, and to assess the validity of extrapolation from HIV sentinel surveillance amongst antenatal clinic attenders (ANC) to the general population. (nih.gov)
  • The higher pregnancy and birth rates among HIV-negative compared to HIV-positive women is another potential source of bias, as is the high rate of ANC clients aged 18-19 years (66%, compared with 34% in the general population of women). (nih.gov)
  • Teenagers analysed by single year of age revealed both ANC and women in the general population with about the same steep increase in prevalence by age, but the former at consistently higher rates. (nih.gov)
  • Even though representing an obvious oversimplification, extrapolations of overall prevalence rates may correlate with that of the general population. (nih.gov)
  • Women and population dynamics : perspectives from Asian countries / edited by K. Mahadevan. (who.int)
  • In the urban area, the adjusted overall HIV prevalence rate of ANC (aged 15-39 years) was 24.4% [95% confidence interval (CI), 20.9-28.0] compared with 26.0% (95% CI, 23.4-28.6) in the general population. (nih.gov)
  • According to various measurements, 1958 began with a high predator population and a low forage population. (seafwa.org)
  • Surveillance of ANC tended to underestimate the overall HIV prevalence of the general population, but differences were not statistically significant. (nih.gov)
  • Here we show that inbreeding depression strongly influences the population dynamics of an endangered killer whale population, despite genomic signatures of purging of deleterious alleles via natural selection. (nature.com)
  • The populations of galeate acritarchs from the Cambrian-Ordovician transition section in borehole Nl-2 of the Algerian Sahara show a gradual increase in process length and in complexity of the process structures through the succession. (palass.org)
  • The authors acknowledge that regional within-season factors (precipitation, IPM strategies, agronomic practices, etc.) also influence population dynamics. (oregonstate.edu)
  • The validity of use of this key sentinel group in terms of HIV prevalence estimation was evaluated in a population-based survey of 4195 Zambian adults recruited through stratified random cluster sampling in urban Lusaka and rural Mposhi district in 1995-96. (nih.gov)
  • The average length of bass captured by electro-fishing increased each succeeding year, indicating a population of larger bass fewer in number. (seafwa.org)