Aquatic Organisms: Organisms that live in water.Fresh Water: Water containing no significant amounts of salts, such as water from RIVERS and LAKES.Rivers: Large natural streams of FRESH WATER formed by converging tributaries and which empty into a body of water (lake or ocean).Water Pollutants, Chemical: Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water.Water Microbiology: The presence of bacteria, viruses, and fungi in water. This term is not restricted to pathogenic organisms.Fishes: A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.Water Pollutants: Substances or organisms which pollute the water or bodies of water. Use for water pollutants in general or those for which there is no specific heading.Ecosystem: 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)Lakes: Inland bodies of still or slowly moving FRESH WATER or salt water, larger than a pond, and supplied by RIVERS and streams.Ecotoxicology: The study of ENVIRONMENTAL POLLUTION and the toxic effects of ENVIRONMENTAL POLLUTANTS on the ECOSYSTEM. The term was coined by Truhaut in 1969.Birnaviridae: A family of bisegmented, double-stranded RNA viruses causing infection in fish, mollusks, fowl, and Drosophila. There are three genera: AQUABIRNAVIRUS; AVIBIRNAVIRUS; and ENTOMOBIRNAVIRUS. Horizontal and vertical transmission occurs for all viruses.Ponds: Inland bodies of standing FRESHWATER usually smaller than LAKES. They can be man-made or natural but there is no universal agreement as to their exact size. Some consider a pond to be a small body of water that is shallow enough for sunlight to reach the bottom.Daphnia: A diverse genus of minute freshwater CRUSTACEA, of the suborder CLADOCERA. They are a major food source for both young and adult freshwater fish.Hydrocharitaceae: A plant family of the order Hydrocharitales, subclass ALISMATIDAE, class Liliopsida (monocotyledons).Cetacea: An order of wholly aquatic MAMMALS occurring in all the OCEANS and adjoining seas of the world, as well as in certain river systems. They feed generally on FISHES, cephalopods, and crustaceans. Most are gregarious and most have a relatively long period of parental care and maturation. Included are DOLPHINS; PORPOISES; and WHALES. (From Walker's Mammals of the World, 5th ed, pp969-70)Wetlands: Environments or habitats at the interface between truly terrestrial ecosystems and truly aquatic systems making them different from each yet highly dependent on both. Adaptations to low soil oxygen characterize many wetland species.Hydrobiology: The study of aquatic life inhabiting bodies of water, including growth, morphology, physiology, genetics, distribution, and interactions with other organisms and the environment. It includes MARINE HYDROBIOLOGY.Sirenia: An order of heavy-bodied, slow-moving, completely aquatic, herbivorous mammals. The body is fusiform, plump, and hairless, except for bristles on the snout. Hindlimbs are absent, the forelimbs are modified to flippers, and the tail is a horizontal fluke. (From Scott, Concise Encyclopedia Biology, 1996)Pipidae: A family of the order Anura, distinguished by the lack of a tongue. It includes four living genera of aquatic "toads". Two of the most familiar pipids are the popularly called Surinam "toad" (Pipa pipa) and XENOPUS LAEVIS.Potamogetonaceae: A plant family of the order Najadales, subclass Alismatidae, class Liliopsida (monocotyledons).Food Chain: 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.Seawater: The salinated water of OCEANS AND SEAS that provides habitat for marine organisms.Aquaculture: Cultivation of natural faunal resources of water. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Eutrophication: The enrichment of a terrestrial or aquatic ECOSYSTEM by the addition of nutrients, especially nitrogen and phosphorus, that results in a superabundant growth of plants, ALGAE, or other primary producers. It can be a natural process or result from human activity such as agriculture runoff or sewage pollution. In aquatic ecosystems, an increase in the algae population is termed an algal bloom.Water Movements: The flow of water in enviromental bodies of water such as rivers, oceans, water supplies, aquariums, etc. It includes currents, tides, and waves.Eichhornia: A plant genus of the family PONTEDERIACEAE that is used as a biological filter for treating wastewater.Environmental Monitoring: 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.Phylogeny: The relationships of groups of organisms as reflected by their genetic makeup.Araceae: A plant family of the order Arales, subclass Arecidae, class Liliopsida (monocot). Many members contain OXALIC ACID and calcium oxalate (OXALATES).Swimming: An activity in which the body is propelled through water by specific movement of the arms and/or the legs. Swimming as propulsion through water by the movement of limbs, tail, or fins of animals is often studied as a form of PHYSICAL EXERTION or endurance.Hydrotherapy: External application of water for therapeutic purposes.Predatory Behavior: Instinctual behavior pattern in which food is obtained by killing and consuming other species.Water Pollution: Contamination of bodies of water (such as LAKES; RIVERS; SEAS; and GROUNDWATER.)Amphipoda: An order of mostly marine CRUSTACEA containing more than 5500 species in over 100 families. Like ISOPODA, the other large order in the superorder Peracarida, members are shrimp-like in appearance, have sessile compound eyes, and no carapace. But unlike Isopoda, they possess thoracic gills and their bodies are laterally compressed.Water: 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)Life Support Systems: Systems that provide all or most of the items necessary for maintaining life and health. Provisions are made for the supplying of oxygen, food, water, temperature and pressure control, disposition of carbon dioxide and body waste. The milieu may be a spacecraft, a submarine, or the surface of the moon. In medical care, usually under hospital conditions, LIFE SUPPORT CARE is available. (From Webster's New Collegiate Dictionary)Larva: Wormlike or grublike stage, following the egg in the life cycle of insects, worms, and other metamorphosing animals.Ecology: 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)Invertebrates: Animals that have no spinal column.Zooplankton: Minute free-floating animal organisms which live in practically all natural waters.Cladocera: A suborder of CRUSTACEA, order Diplostraca, comprising the water fleas. They are benthic filter feeders that consume PHYTOPLANKTON. The body is laterally compressed and enclosed in a bivalved carapace, from which the head extends.Biodiversity: The variety of all native living organisms and their various forms and interrelationships.Crustacea: A large subphylum of mostly marine ARTHROPODS containing over 42,000 species. They include familiar arthropods such as lobsters (NEPHROPIDAE), crabs (BRACHYURA), shrimp (PENAEIDAE), and barnacles (THORACICA).Geologic Sediments: A mass of organic or inorganic solid fragmented material, or the solid fragment itself, that comes from the weathering of rock and is carried by, suspended in, or dropped by air, water, or ice. It refers also to a mass that is accumulated by any other natural agent and that forms in layers on the earth's surface, such as sand, gravel, silt, mud, fill, or loess. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1689)Humic Substances: Organic matter in a state of advanced decay, after passing through the stages of COMPOST and PEAT and before becoming lignite (COAL). It is composed of a heterogenous mixture of compounds including phenolic radicals and acids that polymerize and are not easily separated nor analyzed. (E.A. Ghabbour & G. Davies, eds. Humic Substances, 2001).Water Quality: A rating of a body of water based on measurable physical, chemical, and biological characteristics.Chironomidae: A family of nonbiting midges, in the order DIPTERA. Salivary glands of the genus Chironomus are used in studies of cellular genetics and biochemistry.Blastocladiella: A genus of aquatic fungi of the family Blastocladiaceae, order Blastocladiales, used in the study of zoospore formation.Water Pollution, Chemical: Adverse effect upon bodies of water (LAKES; RIVERS; seas; groundwater etc.) caused by CHEMICAL WATER POLLUTANTS.Gills: Paired respiratory organs of fishes and some amphibians that are analogous to lungs. They are richly supplied with blood vessels by which oxygen and carbon dioxide are exchanged directly with the environment.Amphibians: VERTEBRATES belonging to the class amphibia such as frogs, toads, newts and salamanders that live in a semiaquatic environment.Angiosperms: Members of the group of vascular plants which bear flowers. They are differentiated from GYMNOSPERMS by their production of seeds within a closed chamber (OVARY, PLANT). The Angiosperms division is composed of two classes, the monocotyledons (Liliopsida) and dicotyledons (Magnoliopsida). Angiosperms represent approximately 80% of all known living plants.Plankton: Community of tiny aquatic PLANTS and ANIMALS, and photosynthetic BACTERIA, that are either free-floating or suspended in the water, with little or no power of locomotion. They are divided into PHYTOPLANKTON and ZOOPLANKTON.Toxicity Tests, Acute: Experiments designed to determine the potential toxic effects of one-time, short-term exposure to a chemical or chemicals.Environment: The external elements and conditions which surround, influence, and affect the life and development of an organism or population.Insects: 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)Perciformes: 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.Phytoplankton: 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.Paleontology: The study of early forms of life through fossil remains.Seasons: 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)Fish Diseases: Diseases of freshwater, marine, hatchery or aquarium fish. This term includes diseases of both teleosts (true fish) and elasmobranchs (sharks, rays and skates).Species Specificity: 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.Catfishes: Common name of the order Siluriformes. This order contains many families and over 2,000 species, including venomous species. Heteropneustes and Plotosus genera have dangerous stings and are aggressive. Most species are passive stingers.Swimming PoolsBacteria: 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.Vibrio cholerae: The etiologic agent of CHOLERA.Alismataceae: A plant family of the subclass ALISMATIDAE, class Liliopsida (monocotyledons) of aquatic plants. The flower parts are in threes with 3 green sepals and 3 white or yellow petals.Snails: Marine, freshwater, or terrestrial mollusks of the class Gastropoda. Most have an enclosing spiral shell, and several genera harbor parasites pathogenic to man.Population Density: Number of individuals in a population relative to space.Biota: The spectrum of different living organisms inhabiting a particular region, habitat, or biotope.TurtlesEukaryota: 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.Biological Evolution: The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics.Aquabirnavirus: A genus of RNA viruses in the family BIRNAVIRIDAE infecting fish, mollusks, and crustaceans. It is transmitted both vertically and horizontally with no known vectors. The natural hosts are salmonids and the type species is INFECTIOUS PANCREATIC NECROSIS VIRUS.Biomass: 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.Population Dynamics: The pattern of any process, or the interrelationship of phenomena, which affects growth or change within a population.Alismatidae: A plant subclass of the class Liliopsida (monocotyledons) in the Chronquist classification system. This is equivalent to the Alismatales order in the APG classification system. It is a primitive group of more or less aquatic plants.Diatoms: The common name for the phylum of microscopic unicellular STRAMENOPILES. Most are aquatic, being found in fresh, brackish, and salt water. Diatoms are noted for the symmetry and sculpturing of their siliceous cell walls. They account for 40% of PHYTOPLANKTON, but not all diatoms are planktonic.Rotifera: A class of minute animals of the phylum Aschelminthes.Biodegradation, Environmental: Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers.Sequence Analysis, DNA: A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis.Pinnipedia: The suborder of aquatic CARNIVORA comprising the WALRUSES; FUR SEALS; SEA LIONS; and EARLESS SEALS. They have fusiform bodies with very short tails and are found on all sea coasts. The offspring are born on land.Dolphins: Mammals of the families Delphinidae (ocean dolphins), Iniidae, Lipotidae, Pontoporiidae, and Platanistidae (all river dolphins). Among the most well-known species are the BOTTLE-NOSED DOLPHIN and the KILLER WHALE (a dolphin). The common name dolphin is applied to small cetaceans having a beaklike snout and a slender, streamlined body, whereas PORPOISES are small cetaceans with a blunt snout and rather stocky body. (From Walker's Mammals of the World, 5th ed, pp978-9)Mycobacterium ulcerans: A slow-growing mycobacterium that infects the skin and subcutaneous tissues, giving rise to indolent BURULI ULCER.Fossils: Remains, impressions, or traces of animals or plants of past geological times which have been preserved in the earth's crust.Introduced Species: Non-native organisms brought into a region, habitat, or ECOSYSTEM by human activity.Estuaries: A partially enclosed body of water, and its surrounding coastal habitats, where saltwater from the ocean mixes with fresh water from rivers or streams. The resulting mixture of seawater and fresh water is called brackish water and its salinity can range from 0.5 to 35 ppt. (accessed http://oceanservice.noaa.gov/education/kits/estuaries/estuaries01_whatis.html)Conservation of Natural Resources: The protection, preservation, restoration, and rational use of all resources in the total environment.Arthropods: Members of the phylum Arthropoda, composed of organisms having a hard, jointed exoskeleton and paired jointed legs. It includes the class INSECTS and the subclass ARACHNIDA, many species of which are important medically as parasites or as vectors of organisms capable of causing disease in man.Cyprinodontiformes: An order of fish with eight families and numerous species of both egg-laying and livebearing fish. Families include Cyprinodontidae (egg-laying KILLIFISHES;), FUNDULIDAEl; (topminnows), Goodeidae (Mexican livebearers), Jenynsiidae (jenynsiids), Poeciliidae (livebearers), Profundulidae (Middle American killifishes), Aplocheilidae, and Rivulidae (rivulines). In the family Poeciliidae, the guppy and molly belong to the genus POECILIA.Integumentary System: The outer covering of the body composed of the SKIN and the skin appendages, which are the HAIR, the NAILS; and the SEBACEOUS GLANDS and the SWEAT GLANDS and their ducts.Otters: Fish-eating carnivores of the family MUSTELIDAE, found on both hemispheres.Feeding Behavior: Behavioral responses or sequences associated with eating including modes of feeding, rhythmic patterns of eating, and time intervals.Cyprinidae: A family of freshwater fish comprising the minnows or CARPS.Chytridiomycota: A phylum of fungi that was formerly considered a subdivision of Phycomycetes. They are the only fungi that produce motile spores (zoospores) at some stage in their life cycle. Most are saprobes but they also include examples of plant, animal, and fungal pathogens.Molecular Sequence Data: 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.Copepoda: 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 Biology: The study of the origin, structure, development, growth, function, genetics, and reproduction of organisms which inhabit the OCEANS AND SEAS.Birds: Warm-blooded VERTEBRATES possessing FEATHERS and belonging to the class Aves.Lythrum: A plant genus of the family LYTHRACEAE that contains ALKALOIDS.Mitosporic Fungi: A large and heterogenous group of fungi whose common characteristic is the absence of a sexual state. Many of the pathogenic fungi in humans belong to this group.Disease Vectors: Invertebrates or non-human vertebrates which transmit infective organisms from one host to another.Adaptation, Physiological: The non-genetic biological changes of an organism in response to challenges in its ENVIRONMENT.Freshwater Biology: The study of life and ECOLOGIC SYSTEMS in bodies of FRESHWATER.Plants: 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.Vibrio cholerae O139: Strains of VIBRIO CHOLERAE containing O ANTIGENS group 139. This strain emerged in India in 1992 and caused a CHOLERA epidemic.Urodela: An order of the Amphibia class which includes salamanders and newts. They are characterized by usually having slim bodies and tails, four limbs of about equal size (except in Sirenidae), and a reduction in skull bones.Geography: 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)Beetles: INSECTS of the order Coleoptera, containing over 350,000 species in 150 families. They possess hard bodies and their mouthparts are adapted for chewing.Sewage: Refuse liquid or waste matter carried off by sewers.BrazilBody Size: The physical measurements of a body.RNA, Ribosomal, 16S: Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis.Oceans and Seas: 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).Metals, Heavy: Metals with high specific gravity, typically larger than 5. They have complex spectra, form colored salts and double salts, have a low electrode potential, are mainly amphoteric, yield weak bases and weak acids, and are oxidizing or reducing agents (From Grant & Hackh's Chemical Dictionary, 5th ed)Plant Weeds: A plant growing in a location where it is not wanted, often competing with cultivated plants.Animal Shells: The hard rigid covering of animals including MOLLUSCS; TURTLES; INSECTS; and crustaceans.Maps as Topic: Representations, normally to scale and on a flat medium, of a selection of material or abstract features on the surface of the earth, the heavens, or celestial bodies.Birnaviridae Infections: Virus diseases caused by the BIRNAVIRIDAE.Toxicity Tests: An array of tests used to determine the toxicity of a substance to living systems. These include tests on clinical drugs, foods, and environmental pollutants.Drowning: Death that occurs as a result of anoxia or heart arrest, associated with immersion in liquid.Vibrio: A genus of VIBRIONACEAE, made up of short, slightly curved, motile, gram-negative rods. Various species produce cholera and other gastrointestinal disorders as well as abortion in sheep and cattle.Cholera: An acute diarrheal disease endemic in India and Southeast Asia whose causative agent is VIBRIO CHOLERAE. This condition can lead to severe dehydration in a matter of hours unless quickly treated.Oryzias: The only genus in the family Oryziinae, order BELONIFORMES. Oryzias are egg-layers; other fish of the same order are livebearers. Oryzias are used extensively in testing carcinogens.Immersion: The placing of a body or a part thereof into a liquid.Mercury: A silver metallic element that exists as a liquid at room temperature. It has the atomic symbol Hg (from hydrargyrum, liquid silver), atomic number 80, and atomic weight 200.59. Mercury is used in many industrial applications and its salts have been employed therapeutically as purgatives, antisyphilitics, disinfectants, and astringents. It can be absorbed through the skin and mucous membranes which leads to MERCURY POISONING. Because of its toxicity, the clinical use of mercury and mercurials is diminishing.Biomechanical Phenomena: The properties, processes, and behavior of biological systems under the action of mechanical forces.Salinity: Degree of saltiness, which is largely the OSMOLAR CONCENTRATION of SODIUM CHLORIDE plus any other SALTS present. It is an ecological factor of considerable importance, influencing the types of organisms that live in an ENVIRONMENT.Salmon: 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).Verrucomicrobia: A phylum of gram-negative bacteria containing seven class-level groups from a wide variety of environments. Most members are chemoheterotrophs.Oncorhynchus mykiss: A large stout-bodied, sometimes anadromous, TROUT found in still and flowing waters of the Pacific coast from southern California to Alaska. It has a greenish back, a whitish belly, and pink, red, or lavender stripes on the sides, with usually a sprinkling of black dots. It is highly regarded as a sport and food fish. Its former name was Salmo gairdneri. The sea-run rainbow trouts are often called steelheads. Redband trouts refer to interior populations of rainbows.Biological Oxygen Demand Analysis: Testing for the amount of biodegradable organic material in a water sample by measuring the quantity of oxygen consumed by biodegradation of those materials over a specific time period.DNA, Bacterial: Deoxyribonucleic acid that makes up the genetic material of bacteria.Heteroptera: A suborder of HEMIPTERA, called true bugs, characterized by the possession of two pairs of wings. It includes the medically important families CIMICIDAE and REDUVIIDAE. (From Dorland, 28th ed)Anostraca: An order of CRUSTACEA comprised of shrimp-like organisms containing body trunks with at least 20 segments. The are commonly used as aquarium food.Bryozoa: A phylum of small sessile aquatic animals living as small tufted colonies. Some appear like hydroids or corals, but their internal structure is more advanced. Most bryozoans are matlike, forming thin encrustations on rocks, shells, or kelp. (Storer & Stebbins, General Zoology, 6th ed, p443)Methylmercury Compounds: Organic compounds in which mercury is attached to a methyl group.Bays: An area of water mostly surrounded by land, usually smaller than a gulf, and affording access to the sea.Marine Toxins: Toxic or poisonous substances elaborated by marine flora or fauna. They include also specific, characterized poisons or toxins for which there is no more specific heading, like those from poisonous FISHES.Amber: A yellowish fossil resin, the gum of several species of coniferous trees, found in the alluvial deposits of northeastern Germany. It is used in molecular biology in the analysis of organic matter fossilized in amber.Models, Biological: 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.Shellfish: Aquatic invertebrates belonging to the phylum MOLLUSCA or the subphylum CRUSTACEA, and used as food.Culicidae: 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.Reptiles: Cold-blooded, air-breathing VERTEBRATES belonging to the class Reptilia, usually covered with external scales or bony plates.Infectious pancreatic necrosis virus: The type species of AQUABIRNAVIRUS, causing infectious pancreatic necrosis in salmonid fish and other freshwater and marine animals including mollusks.Chlorophyta: A phylum of photosynthetic EUKARYOTA bearing double membrane-bound plastids containing chlorophyll a and b. They comprise the classical green algae, and represent over 7000 species that live in a variety of primarily aquatic habitats. Only about ten percent are marine species, most live in freshwater.Ecological Systems, Closed: 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)Sarraceniaceae: A plant family of the order Nepenthales.Ships: Large vessels propelled by power or sail used for transportation on rivers, seas, oceans, or other navigable waters. Boats are smaller vessels propelled by oars, paddles, sail, or power; they may or may not have a deck.Bivalvia: A class in the phylum MOLLUSCA comprised of mussels; clams; OYSTERS; COCKLES; and SCALLOPS. They are characterized by a bilaterally symmetrical hinged shell and a muscular foot used for burrowing and anchoring.Diving: An activity in which the organism plunges into water. It includes scuba and bell diving. Diving as natural behavior of animals goes here, as well as diving in decompression experiments with humans or animals.DNA, Ribosomal: DNA sequences encoding RIBOSOMAL RNA and the segments of DNA separating the individual ribosomal RNA genes, referred to as RIBOSOMAL SPACER DNA.Locomotion: Movement or the ability to move from one place or another. It can refer to humans, vertebrate or invertebrate animals, and microorganisms.Virus Physiological Phenomena: Biological properties, processes, and activities of VIRUSES.Bufonidae: The family of true toads belonging to the order Anura. The genera include Bufo, Ansonia, Nectophrynoides, and Atelopus.Phylogeography: 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)Aeromonas: A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria that occurs singly, in pairs, or in short chains. Its organisms are found in fresh water and sewage and are pathogenic to humans, frogs, and fish.Fungi: A kingdom of eukaryotic, heterotrophic organisms that live parasitically as saprobes, including MUSHROOMS; YEASTS; smuts, molds, etc. They reproduce either sexually or asexually, and have life cycles that range from simple to complex. Filamentous fungi, commonly known as molds, refer to those that grow as multicellular colonies.Eleocharis: A plant genus of the family CYPERACEAE.Isopoda: One of the largest orders of mostly marine CRUSTACEA, containing over 10,000 species. Like AMPHIPODA, the other large order in the superorder Peracarida, members are shrimp-like in appearance, have sessile compound eyes, and no carapace. But unlike Amphipoda, they possess abdominal pleopods (modified as gills) and their bodies are dorsoventrally flattened.Brachyura: An infraorder of chiefly marine, largely carnivorous CRUSTACEA, in the order DECAPODA, including the genera Cancer, Uca, and Callinectes.Ferns: Seedless nonflowering plants of the class Filicinae. They reproduce by spores that appear as dots on the underside of feathery fronds. In earlier classifications the Pteridophyta included the club mosses, horsetails, ferns, and various fossil groups. In more recent classifications, pteridophytes and spermatophytes (seed-bearing plants) are classified in the Subkingdom Tracheobionta (also known as Tracheophyta).Biofilms: Encrustations, formed from microbes (bacteria, algae, fungi, plankton, or protozoa) embedding in extracellular polymers, that adhere to surfaces such as teeth (DENTAL DEPOSITS); PROSTHESES AND IMPLANTS; and catheters. Biofilms are prevented from forming by treating surfaces with DENTIFRICES; DISINFECTANTS; ANTI-INFECTIVE AGENTS; and antifouling agents.Pontederiaceae: A plant family of the order Liliales, subclass Liliidae, class Liliopsida (monocotyledons). Most species are perennials, native primarily to tropical America. They have creeping rootstocks, fibrous roots, and leaves in clusters at the base of the plant or borne on branched stems. The fruit is a capsule containing many seeds, or a one-seeded winged structure.ArgentinaScrophulariaceae: The figwort plant family of the order Lamiales. The family is characterized by bisexual flowers with tubular corollas (fused petals) that are bilaterally symmetrical (two-lips) and have four stamens in most, two of which are usually shorter.Anseriformes: An order of BIRDS comprising the waterfowl, particularly DUCKS; GEESE; swans; and screamers.Water Purification: Any of several processes in which undesirable impurities in water are removed or neutralized; for example, chlorination, filtration, primary treatment, ion exchange, and distillation. It includes treatment of WASTE WATER to provide potable and hygienic water in a controlled or closed environment as well as provision of public drinking water supplies.Bromelia: A plant genus of the family BROMELIACEAE. Members contain karatasin and balansain (ENDOPEPTIDASES) and BROMELAINS.Fisheries: Places for cultivation and harvesting of fish, particularly in sea waters. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Hydrodynamics: The motion of fluids, especially noncompressible liquids, under the influence of internal and external forces.Atlantic OceanEcological and Environmental Processes: Ecosystem and environmental activities, functions, or events.Carps: Common name for a number of different species of fish in the family Cyprinidae. This includes, among others, the common carp, crucian carp, grass carp, and silver carp.Endangered Species: An animal or plant species in danger of extinction. Causes can include human activity, changing climate, or change in predator/prey ratios.Kenya: A republic in eastern Africa, south of ETHIOPIA, west of SOMALIA with TANZANIA to its south, and coastline on the Indian Ocean. Its capital is Nairobi.Buruli Ulcer: A lesion in the skin and subcutaneous tissues due to infections by MYCOBACTERIUM ULCERANS. It was first reported in Uganda, Africa.Temperature: 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.Fin Whale: The species Balaenoptera physalus, in the family Balaenopteridae, characterized by a large, strongly curved, dorsal fin. It is the second largest of the WHALES, highly migratory, but rarely seen near the shore.Water Supply: Means or process of supplying water (as for a community) usually including reservoirs, tunnels, and pipelines and often the watershed from which the water is ultimately drawn. (Webster, 3d ed)Satellite Communications: Communications using an active or passive satellite to extend the range of radio, television, or other electronic transmission by returning signals to earth from an orbiting satellite.Microcystins: Cyclic heptapeptides found in MICROCYSTIS and other CYANOBACTERIA. Hepatotoxic and carcinogenic effects have been noted. They are sometimes called cyanotoxins, which should not be confused with chemicals containing a cyano group (CN) which are toxic.DucksCulex: A genus of mosquitoes (CULICIDAE) commonly found in tropical regions. Species of this genus are vectors for ST. LOUIS ENCEPHALITIS as well as many other diseases of man and domestic and wild animals.Tropical Climate: 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)Environmental Microbiology: The study of microorganisms living in a variety of environments (air, soil, water, etc.) and their pathogenic relationship to other organisms including man.Weed Control: The prevention of growth and or spread of unwanted plants.Salamandridae: A family of Urodela consisting of 15 living genera and about 42 species and occurring in North America, Europe, Asia, and North Africa.Bass: Common name for FISHES belonging to the order Perciformes and occurring in three different families.Anura: An order of the class Amphibia, which includes several families of frogs and toads. They are characterized by well developed hind limbs adapted for jumping, fused head and trunk and webbed toes. The term "toad" is ambiguous and is properly applied only to the family Bufonidae.Environmental Pollution: Contamination of the air, bodies of water, or land with substances that are harmful to human health and the environment.Mentha: Mentha is a genus of the mint family (LAMIACEAE). It is known for species having characteristic flavor and aroma.Harmful Algal Bloom: An algal bloom where the algae produce powerful toxins that can kill fish, birds, and mammals, and ultimately cause illness in humans. The harmful bloom can also cause oxygen depletion in the water due to the death and decomposition of non-toxic algae species.Waste Water: Contaminated water generated as a waste product of human activity.Video Recording: The storing or preserving of video signals for television to be played back later via a transmitter or receiver. Recordings may be made on magnetic tape or discs (VIDEODISC RECORDING).Australasia: Australia, New Zealand and neighboring islands in the South Pacific Ocean. (Random House Unabridged Dictionary, 2d ed.)Animal DiseasesMetamorphosis, Biological: Profound physical changes during maturation of living organisms from the immature forms to the adult forms, such as from TADPOLES to frogs; caterpillars to BUTTERFLIES.Molluscacides: Agents destructive to snails and other mollusks.Floods: Sudden onset water phenomena with different speed of occurrence. These include flash floods, seasonal river floods, and coastal floods, associated with CYCLONIC STORMS; TIDALWAVES; and storm surges.Animal Distribution: A process by which animals in various forms and stages of development are physically distributed through time and space.
... authorizing the creation of the park system. As part of the proposed system, Bronx Park would be at the center of the system. ... "MTA Bus Time: Bx29 City Island - Co-op City Bay Plaza". mta.info. MTA Bus Time. MTA Regional Bus Operations. "Bx5 bus schedule ... "PUBLIC IS GREETED AT ORCHARD BEACH; Uncompleted Aquatic Center Dedicated -- Mayor, Moses Exchange Thrusts. FORMER DECRIES ... The New York Times. June 13, 1937. Retrieved September 4, 2017. "Pelham Bay Dam Approved". The New York Times. April 14, 1936. ...
Mud crab (Scylla serrata) population changes in Koggala Lagoon, Sri Lanka since construction of the groyne system. Aquatic ... Effect of inlet morphometry changes on natural sensitivity and flushing time of the Koggala lagoon, Sri Lanka. The Current ... "Mud Crab (Scylla serrata) population changes in Koggala Lagoon, Sri Lanka since construction of the groyne system." Aquatic ... As a solution to this environmental crisis the groyne system was modified in 2013 to allow the natural way of water flushing in ...
Numerous passive and active treatment systems have been installed in the watershed in recent times. Nanticoke Creek is ... In the 1970s, the Operation Scarlift report for the creek noted that the creek was almost entirely devoid of aquatic life due ... from Pennsylvanian times), and the Llewellyn Formation (also from Pennsylvanian times). The Lower Red Ash coal seam is present ... Some parts of the creek are known to run dry at times. Some water from the watershed flows to the South Wilkes-Barre Boreholes ...
2008, July 3). Aquatic Science Centre to open along Ulu Pandan Canal. The Straits Times, Home, p10. Aquatic Science Centre in ... 17). Systems to forecast tides and currents. The Straits Times, Science. (2007, Feb. 17). Taking water management strategies a ... The Straits Times, Science (2006, Jun. 27). MOU for water knowledge signed, The Business Times. Chow P.N.(2007, Feb. 8). ... while at the same time ensure flood protection for reservoir systems. SDWA also carried out several large research projects for ...
... photosynthetic organisms in aquatic systems. Quota - Quota is the amount of catch that can be legally landed in a time period. ... Much primary productivity in marine or aquatic systems is made up of phytoplankton, which are tiny one-celled algae that float ... Flushing time - the time required to replace all the water in an estuary or harbour by the actions of currents and tides. Fork ... Quota management system (QMS) - a system that limits the amount of fish that can be taken by commercial fishers. The QMS sets a ...
"Woodard Bay Aquatic Conservation Lease", The Nature Conservancy. Retrieved 8/3/08. Steven, R. "Mystery on the Wing: Cleaning ... History of Olympia, Washington National Park Service (2008-04-15). "National Register Information System". National Register of ... the cobwebs of myth about bats", Seattle Times. Retrieved 8/3/08. "Woodard Bay", ExperienceWA.com. Retrieved 8/3/08. "South ... Woodard Bay Aquatic Conservation Lease. The Nature Conservancy. Retrieved 9/5/09.. ...
... s have a tendency to live in deeper waters during the day and move into shallower water around evening time. As ... Inside of the Columbia River system, the bridgelip sucker shares much of its territory another similar looking sucker, the ... adults they eat periphyton (green growth and microorganisms found on submerged substrata). Adolescents, however, eat aquatic ... The bridgelip sucker (Catostomus columbianus) is a fish in the family Catostomidae that occupies the Columbia River system. ...
Females produce an average of 57 eggs at a time, with larger females producing more eggs. This is considered to be a vulnerable ... It feeds on invertebrates, especially the larvae of aquatic insects. It spawns in summer, starting in June in northern regions ... The western sand darter occurs in river systems from Lake Michigan to Texas, including several sections of the Mississippi ... It requires loose substrate, because it spends much of its time buried in the sand with just its head protruding. This behavior ...
This represented the first time that a qualification system (including time standards) was used for the swimming portion of the ... Swimming is one of five aquatic disciplines at the championships. In January 2010, the FINA Bureau approved the swimming ... Times had to be swum at a FINA approved competition/meet between March 1, 2010 and June 30, 2011. The qualification meets ... The qualifying system for individual events was similar to what is employed for the Olympics. Historically, there has been a ...
Sources of the causative agents are aquatic systems and potting soil. The first outbreak caused by inhalation of aersolized ... Since that time, other species of Legionella that cause Pontiac fever have been identified, most notably in New Zealand, in ... The New Zealand outbreak also marked the first time Pontiac fever had been traced to potting soil. Species of Legionella known ... "In Philadelphia 30 Years Ago, an Eruption of Illness and Fear". The New York Times. 1 August 2006. "biocentral.com". biocentral ...
Andersson, Andreas J. (April 2013). "The Marine Carbon System and Ocean Acidification during Phanerozoic Time". Geochemical ... "The sensitivity of the Phanerozoic inorganic carbon system to the onset of pelagic sedimentation" in Aquatic Geochemistry with ... "The Marine Carbon System and Ocean Acidification during Phanerozoic Time" in Geochemical Perspectives with A. J. Andersson ( ... and modeling of Earth's surface environmental system over geological time. In 1981 Mackenzie left Northwestern and accepted an ...
Repeat this at least three times and average the measurement times. Express velocity in meters per second. If the measurements ... Rivers are major aquatic landscapes for all manners of plants and animals. Rivers even help keep the aquifers underground full ... For a basin with an area of 5000 square miles or more, the river system is typically gauged at five to ten places. The data ... The quickest response times between rainfall and streamflow occur in urbanized areas where yard drains, street gutters, and ...
At one time the belief was that the only agents involved with the expansion of potholes were weathering. Within the potholes is ... Potholes do not contain predators like fish or aquatic insects. The biofilm breaks down some of the siliceous minerals in the ... a various eco-system that contains bacteria such as cyanobacteria, fungi, and algae which can be referred as biofilm. ...
At times, major flooding has caused inundation of some structures in localized areas in the vicinity of Dundaff Creek. The ... village of Clifford has also been impacted by flooding from the creek at times. The designated use for Dundaff Creek is aquatic ... Its identifier in the Geographic Names Information System is 1173604. A dam known as the Dundaff Dam was constructed on Dundaff ... This was one of about a thousand bridges in Pennsylvania whose weight limits were changed at that time. A bridge carrying ...
At the same time, a swimming pool was finally constructed for aquatic sports. In the mid-1960s, the student body raised funds ... In 1971, new forced air heating systems were retrofitted into the original classrooms which were served by the defunct hot- ... At that time, the junior high schools in Downey became "middle schools" teaching grades 6-8 and the senior high schools became ... Wagner, Dick (January 31, 1991). "He's in It for the Kids: Coach Young Likes His Role as a Father Figure". Los Angeles Times. ...
Other proposed missions to the Saturn system are: 2010 JPL: Journey to Enceladus and Titan (JET) 2011 Titan Mare Explorer (TiME ... an aquatic lander that would explore the methane lakes of the moon Titan. This mission was given US$3 million in May 2011 to ... The Titan Saturn System Mission (TSSM) was a joint NASA/ESA proposal for an exploration of Saturn and its moons Titan and ... The Titan Saturn System Mission (TSSM) was created by the merging of the ESA's Titan and Enceladus Mission (TandEM) with NASA's ...
The Blue Sucker has a spawning time from around March until June. This varies on the location of the fish and also the water ... Blues frequent the thalweg of large river systems, in heavy current. Blue suckers obtain their food off the bottom of rivers ... Some organisms that they eat are aquatic insect larvae, crustaceans, plant materials and algae. ... The peak water temperature is sixty-two degrees and the actual spawning time will usually last around two weeks. Male suckers ...
"Listing of National Park System Areas by State". National Park Service. "NPS Annual Recreation Visits Report". National Park ... "Inventory and Monitoring of Aquatic Bird Species on Lakes Mead and Mohave 2004-2006". Digital [email protected] Retrieved 2013- ... Los Angeles Times. "Hoover Tour Information". Bureau of Reclamation. Retrieved 2013-11-15. "National Monument detail table as ... "Wilderness Areas in the National Park System". Wilderness.net. Retrieved 2013-11-15. National Park Service: Lake Mead National ...
Aquatic crocodyliforms inhabited the rivers along with turtles and fishes. Ker Than (4 August 2010). "Fossil "Cat Crocodile" ... Mammals were relatively uncommon in Gondwana at the time, making it possible for notosuchians to occupy a similar niche. The ... During the Early Cretaceous, the basin was part of a large river system with braided channels and low-lying vegetated ...
Lentic systems gain most of their energy from photosynthesis performed by aquatic plants and algae. This autochthonous process ... indicating that this nutrient may have a long residency time there before it is remineralized and re-introduced to the system. ... Together, these two fields form the more general study area of freshwater or aquatic ecology. Lentic systems are diverse, ... Free-floating macrophytes can occur anywhere on the system's surface. Aquatic plants are more buoyant than their terrestrial ...
... fragmentation of river system preventing travel of aquatic organisms through a continuous river channel; c) silt deposited in ... The occurrence is being observed by natives living along the river every time a flood occur. The ecology of the Subangdaku ... companies have exploited and extracted sand and gravel in the area that are being accumulated by the river's current every time ...
... and triclocarban were added to an experimental system at the same time. Combining these compounds affects resistance by ... As triclocarban is found in high concentrations in aquatic environments, there are concerns regarding its toxicity to aquatic ... One study has investigated how triclocarban remains in the human system after using a bar of soap with traces of triclocarban. ... Specifically, triclocarban has been shown to be toxic to amphibians, fish, invertebrates, and aquatic plants, and traces of the ...
Several aquatic insects have similar or alternative closing methods to prevent water from entering the trachea. The timing and ... In the respiratory system of insects, the tracheal tubes primarily deliver oxygen directly into the animals' tissues. The ... Spiracles (/ˈspɪrəkəl, ˈspaɪ-/) are openings on the surface of some animals, which usually lead to respiratory systems. The ... The closer muscle is controlled by the central nervous system but can also react to localized chemical stimuli. ...
These features help Orthosuchus keep breathing when submerging in the aquatic system. The ears are protected by earflaps, which ... but some key factors contribute to the fact that it is spent the time mostly in water. The first notable evident is on the ... The aquatic environment provides plenty of food for the animal, besides small fish, the animal could also feed on lake ...
Shallow water aquatic systems can also face this problem. Scale also greatly affects measurement techniques. The rate of carbon ... When it is much deeper than the photic zone, this results in phytoplankton spending too much time in the dark for net growth to ... In aquatic systems, primary production is typically measured using one of six main techniques: variations in oxygen ... and whether terrestrial or aquatic systems are the focus. Gross production is almost always harder to measure than net, because ...
Houston is buffered by Galveston Island - which sits in the way of the surge - and the bay system. Spinner, Kate (May 31, 2009 ... In 1916, the Humble Oil and Refining Company, founded by one-time Texas governor Ross S. Sterling and his associates, in ... and aquatic species.[34] ... Vague or ambiguous time from April 2019. *Wikipedia articles in ... Baytown's climate is classified as humid subtropical (Cfa in Köppen climate classification system).[18] Spring supercell ...
Some times water hyacinth can be found growing in muddy soils near the edge of an aquatic system. The leaves are arranged in a ... But herbicide use is more highly regulated in aquatic systems than in terrestrial systems. Chemical control, through the use of ... It can quickly dominate a water way or aquatic system because of rapid leaf production, fragmentation of daughter plants, and ... The best method of controlling water hyacinth is to prevent it from being introduced in to a fresh water system. This can be ...
... www.wylas-timing.com Wylas Timing, Colorado Time Systems, Seiko, Daktronics, Quince electronics and Omega/Swiss Timing. Prior ... Aquatic timing systems are designed to automate the process of timing, judging, and scoring in competitive swimming and other ... Companies that currently manufacture aquatic timing and systems include Stramatel, ALGE-TIMING, Superior Swim Timing, [http:// ... The invention of automatic timing systems brought more accuracy and credibility to aquatic sports. Image Gallery Olympex ...
How to cite: Hofmann, A. F., Middelburg, J. J., Soetaert, K., and Meysman, F. J. R.: pH modelling in aquatic systems with time- ... pH modelling in aquatic systems with time-variable acid-base dissociation constants applied to the turbid, tidal Scheldt ... 2Laboratory of Analytical and Environmental Chemistry, Earth System Sciences research unit, Vrije Universiteit Brussel (VUB), ... 2Laboratory of Analytical and Environmental Chemistry, Earth System Sciences research unit, Vrije Universiteit Brussel (VUB), ...
A tiny fraction (less than 0.01%) of water on Earth is found in lakes and rivers, making our freshwater systems especially ... An integrated knowledge of both chemistry and biology is necessary to understand how freshwater systems function, which is the ... first step necessary to preserve and/or restore these systems. Students will have the opportunity to earn 8 credits in general ... In this program we will learn introductory chemistry and introductory biology through the lens of aquatic ecosystems. ...
Commentary - Yank: the time derivative of force is an important biomechanical variable in sensorimotor systems. ... When crawling, aquatic crabs experience reduced ground reaction forces, but approximately 1000 times more drag than their ... The transition from aquatic to terrestrial environments places significant mechanical challenges on skeletal support systems. ... Time postmolt was calculated from the time exuviation was complete. Crab mass was measured using a balance prior to any limb ...
Developing gregarine apicomplexans as aquatic symbiosis model system at Edinburgh Napier University, listed on FindAPhD.com ... Good time management Desirable attributes: • Good fundamental knowledge and strong interest in culturing invertebrates and/or ... The Gordon and Betty Moore Foundations Symbiosis in Aquatic Systems Initiative, seeks to advance the understanding of aquatic ... Developing gregarine apicomplexans as aquatic symbiosis model system. Edinburgh Napier University School of Applied Sciences ...
Survey participants were estimated to flush condoms down the toilet 2.96% of the time, and emissions were calculated as 0.99 mg ... Do natural rubber latex condoms pose a risk to aquatic systems? Scott Lambert,*ac Catherine Johnson,a Virginie D. J. Keller,b ... Do natural rubber latex condoms pose a risk to aquatic systems? S. Lambert, C. Johnson, V. D. J. Keller, C. J. Sinclair, R. J. ...
Also, the general trend seen in algae growth inhibition over time (i.e., reduced effect on growth over time) was in line with ... Silver nanomaterials in aquatic systems : linking uptake and effects in biota to exposure characterization. Kleiven, Merethe ... 1. Changes in Ag ion and Ag nanoparticle speciation will cause a time dependent change in the ... with time in all waterborne exposures. Common for all AgNO3 exposures were the higher concentrations of dissolved Ag species (, ...
AQUATIC ANIMAL HEALTH June 07. Stephen J. Stephen, Fisheries and Oceans Canada (DFO). How NAAHP fits into New and Old DFO ... National Aquatic Animal Health Laboratory System (NAAHLS) INTER-AMERICAN COMMITTEE ON ... National Aquatic Animal Health Laboratory System (NAAHLS) INTER-AMERICAN COMMITTEE ON AQUATIC ANIMAL HEALTH June 07. Stephen J ... National Aquatic Animal Health Laboratory System (NAAHLS) INTER-AMERICAN COMMITTEE ON - PowerPoint PPT Presentation. ...
Until next time, take care and happy reefkeeping.,br/,,br ... With these new Aquatic Life TI (Twist-In) RO and RO/DI systems ... It is also very affordable compared to other standard RO and RO/DI systems.,br/,,br/,The biggest advantage of the Aquatic Life ... Aquatic Life has just introduced their new Twist In RO and RO/DI systems that make installing and maintaining an RO or RO/DI ... A process that takes 30 minutes to an hour with traditional systems can now be done in 5 minutes or less.,br/,,br/,All the ...
Fisheries and aquatic resources (ponds, lakes, rivers, streams, and oceans) are exceptionally valuable natural assets enjoyed ... A pesticides capacity to harm fish and aquatic animals is largely a function of its (1) toxicity, (2) exposure time, (3) dose ... One way to reduce the effects of pesticides on aquatic systems is to use those chemicals that are least poisonous to aquatic ... Pesticides and Aquatic Animals: A Guide to Reducing Impacts on Aquatic Systems (PDF) ...
The change in caesium activity with time was obtained for the lake and six contributory streams. Two streams had much higher ... Caesium in aquatic systems and fish. A single catchment area, chosen from a group identified as having high levels of secondary ... The change in caesium activity with time was obtained for the lake and six contributory streams. Two streams had much higher ... activity levels than the others and significant relationships with flow and time form the initial Chernobyl fallout. The two ...
Marine mammal offspring are especially vulnerable during the time when their own immune systems have not yet matured. When ... In aquatic mammals, maternal transfer is the movement of contaminants from mother to offspring, typically of lipophilic ... This leads to a transfer of the toxicants into the developing embryos during gestation as well as into milk that an aquatic ... The POP burden carried by male and female marine mammals tends to increase with time until they reach the age of sexual ...
Determination of the protein structures at different times after mixing can be assembled into a time-lapse sequence that shows ... Gibb said the study "supports a big-picture theory in evolution," which is that the nervous system, in its control of bones and ... Further reports about: , Aquatic Creatures , Big Jump , Fish , Invasion , Picture , amphibious fish , evolutionary history ... So if you go back and look at the fossil record to try to say which fish could move around on land, youd have a hard time ...
"Competition between Populations in the Consumer-Producer Trophic Chain in a Closed Aquatic System, Russian Journal of Ecology" ... Competition between Populations in the Consumer-Producer Trophic Chain in a Closed Aquatic System Pisman, T. 2004-10-07 00:00: ... Competition between Populations in the Consumer-Producer Trophic Chain in a Closed Aquatic System. Pisman, T. ... Competition between Populations in the Consumer-Producer Trophic Chain in a Closed Aquatic System. ...
"Commercial silicate phosphate sequestration and desorption leads to a gradual decline of aquatic systems, Environmental Science ... Even if broader desorption experimentation is difficult, expensive and time-consuming, it is a critical consideration ... Commercial silicate phosphate sequestration and desorption leads to a gradual decline of aquatic systems. Svatos, Karl ... Commercial silicate phosphate sequestration and desorption leads to a gradual decline of aquatic systems. Commercial silicate ...
... and secondly in the transfer of residues to the aquatic environment. The high toxicity of these insecticides to aquatic insects ... The high toxicity of these insecticides to aquatic insects and other arthropods has been recognised, but there is little ... The current extent of aquatic contamination by neonicotinoids is reviewed first, and the findings contrasted with the known ... Impacts on populations and aquatic communities, mostly using mesocosms, are reviewed next to identify the communities most at ...
... together coverage of freshwater and marine systems to illustrate the principles and properties that unify aquatic systems. ... You can change your cookie settings at any time. Find out more. #oupcookiepolicy_message { background: none repeat scroll 0 0 # ... Ecology of Aquatic Systems brings together coverage of freshwater and marine systems to illustrate the principles and ... Ecology of Aquatic Systems brings together coverage of freshwater and marine systems to illustrate the principles and ...
... photosynthetic organisms in aquatic systems. Quota - Quota is the amount of catch that can be legally landed in a time period. ... Much primary productivity in marine or aquatic systems is made up of phytoplankton, which are tiny one-celled algae that float ... Flushing time - the time required to replace all the water in an estuary or harbour by the actions of currents and tides. Fork ... Quota management system (QMS) - a system that limits the amount of fish that can be taken by commercial fishers. The QMS sets a ...
of time with the worst floods ever coming in 2006. A good storm disposal system has to be put in place to match the rapid ... The time frame decided for this was 1 March 2006 to 30 June 2006 and is now finished. The amount sanctioned for the work was Rs ... A storm drainage system is a network of structures, channels and underground pipes that carry storm water (rain water) to ponds ... A good and efficient storm water drainage system is beneficial is more ways than one. It not only saves a lot of life and ...
R825433C056 Modeling Transport in Aquatic Systems. R825433C057 Spatial and Temporal Trends in Water Quality. R825433C058 Time ... Lake current systems are difficult to characterize because currents take on the order of 100 hours to reach equilibrium with a ... R825433C052 Pesticide Transport in Subsurface and Surface Water Systems. R825433C053 Currents in Clear Lake. R825433C054 Data ... R825433C008 Reproduction of Birds and mammals in a terrestrial-aquatic interface. R825433C009 Modeling Ecosystems Under ...
R825433C056 Modeling Transport in Aquatic Systems. R825433C057 Spatial and Temporal Trends in Water Quality. R825433C058 Time ... Aquatic Ecosystem, Environmental Microbiology, Biochemistry, Terrestrial Ecosystems, Ecology and Ecosystems, Aquatic Ecosystem ... R825433C052 Pesticide Transport in Subsurface and Surface Water Systems. R825433C053 Currents in Clear Lake. R825433C054 Data ... R825433C008 Reproduction of Birds and mammals in a terrestrial-aquatic interface. R825433C009 Modeling Ecosystems Under ...
Ventilation of Indoor Air in Aquatic Spaces *Ensure indoor air handling system for aquatic spaces is operating properly and ... changing the air handling systems time clock to introduce code ventilation 24 hours per day (no off cycle). ... In-duct UVGI systems can help enhance air cleaning inside central ventilation systems. Consult with a reputable UVGI ... Communication Systems *Put systems-consistent with applicable local, state, territorial, federal, and tribal privacy and ...
Another uncommon feature of the elephant is the intra-abdominal location of its testes, known since the time of Aristotle (28 ... The developing renal, reproductive, and respiratory systems of the African elephant suggest an aquatic ancestry. A. P. Gaeth, R ... The developing renal, reproductive, and respiratory systems of the African elephant suggest an aquatic ancestry ... The developing renal, reproductive, and respiratory systems of the African elephant suggest an aquatic ancestry ...
  • The exact time and place of introduction has been debated, but the plant is native to South America, and therefore reached Lake Victoria due to human activity. (peertechz.com)
  • The early Tethytheria, a group consisting of the Proboscidea, Sirenia, and the extinct Desmostylia, appear to have been semi-aquatic ( 1 , 2 ). (pnas.org)
  • Although the larvae of aquatic snails are initially bilaterally symmetrical, little evidence remains in the asymmetric adult body form. (fsu.edu)
  • The well-developed eyes of aquatic snails are mounted on a pair of tentacles and connect to paired nerve bundles known as ganglia. (fsu.edu)
  • Whether in ponds, wetlands, or streams, aquatic snails rarely become a nuisance because of natural population controls such as disease, competition, and predation. (fsu.edu)
  • However, several significant human health problems, such as schistosomiasis and "swimmer's itch", are dependent on aquatic snails as disease vectors or parasite hosts. (fsu.edu)
  • 1. Changes in Ag ion and Ag nanoparticle speciation will cause a time dependent change in the nanoparticle/colloidal fraction in test media exposure solutions. (bibsys.no)
  • According to use patterns and to physical-chemical properties and environmental behaviour, the aquatic environment is the most important compartment in relation to environmental exposure to Acrylamide. (europa.eu)
  • Record rainfall events in 2012 and above average rainfall in 2013 likely delivered the majority of Hg and MeHg to these systems via interflow and activated groundwater flow through reduced sediments. (altmetric.com)
  • Faucets ran dry for some San Joaquin Valley residents due to desiccated wells and groundwater basins ( New York Times , "With Dry Taps and Toilets, California Drought Turns Desperate," 10/2/14). (ucsusa.org)
  • The problem is that groundwater levels have also now reached lethal levels worldwide .A rigorous scientific investigation is needed to reveal the aquatic risks involved, before we find ourselves back in the 1950s. (earthtimes.org)
  • The Gordon and Betty Moore Foundation's Symbiosis in Aquatic Systems Initiative, seeks to advance the understanding of aquatic symbioses that include microbial partners. (findaphd.com)
  • This model system will enable us to advance the fundamental knowledge on the evolutionary steps of symbiosis in the Apicomplexa, identifying key cellular and molecular transitions in the evolution from free-living relatives to intracellular parasites. (findaphd.com)
  • The Gordon and Betty Moore Foundation is launching a new area of research, the Symbiosis in Aquatic Systems Initiative . (interridge.org)
  • The Symbiosis in Aquatic Systems Initiative of the Gordon and Betty Moore Foundation is soliciting pre-applications for investigator awards. (interridge.org)
  • The goal with the awards is to provide scientists with the resources and flexibility to pursue innovative, risky research that has high potential for significant conceptual and methodological advances in aquatic symbiosis. (interridge.org)
  • Researchers will be evaluated on the significance of their past research, the quality of their current research, the potential for continued groundbreaking science in the future, and the probability that their future work will contribute to the success of the Moore Foundation's Symbiosis in Aquatic Systems Initiative . (interridge.org)
  • Studies of the change in size distribution of both Ag ions and Ag NP in toxicity test media showed a change in size fractions, towards the larger particle sizes, with time in all waterborne exposures. (bibsys.no)
  • In this publication, we provide information about the toxicity and safe use of pesticides that have the potential to enter aquatic systems. (vt.edu)
  • Unlike other similar products, Fritz RPM Calcium Buffer System does not contain unmeasured and unnecessary ions and metals, which unchecked can lead to toxicity in the aquarium. (liveaquaria.com)
  • Nephrostomes, a feature of aquatic vertebrates, were found in the mesonephric kidneys at all stages of development whereas they have never been recorded in the mesonephric kidneys of other viviparous mammals. (pnas.org)
  • greater richness and abundance (8.5 times greater) were recorded in the Tubul-Raqui wetland than in the more urbanized wetland. (mdpi.com)
  • An integrated knowledge of both chemistry and biology is necessary to understand how freshwater systems function, which is the first step necessary to preserve and/or restore these systems. (evergreen.edu)
  • Gregarine transcriptome, genome and cell biology data for selected systems will be produced to gain a holistic picture of the gregarine-host-microbiome interactions. (findaphd.com)
  • Therefore, we examined the ability of L. pneumophila (clinical isolate 130 b) to persist within biofilms formed by various types of aquatic bacteria, using a bioreactor with flow, steel surfaces, and low-nutrient conditions. (nih.gov)
  • 3. The system of claim 2 , wherein the media capable of supporting aerobic bacteria is chosen from biofilm and crushed coral. (google.ca)
  • These three studies demonstrated the presence of river and coastal ocean bacteria in estuaries and suggested that the development of unique estuarine bacterial communities may be related to the relatively long residence time of particles and particle-attached bacteria in some ETMs. (asm.org)
  • It takes time for these "beneficial nitrogen reducing bacteria" to develop. (koivet.com)
  • The evidence from our embryological study of the elephant also suggests that it evolved from an aquatic mammal. (pnas.org)
  • dolphin (aquatic mammal) from The Columbia Encyclopedia, 6th ed. (questia.com)
  • A new pH modelling approach is presented that explicitly quantifies the influence of biogeochemical processes on proton cycling and pH in an aquatic ecosystem, and which accounts for time variable acid-base dissociation constants. (biogeosciences.net)
  • When it is degraded in aquatic systems, hydroxyatrazine, deethylatrazine, and deisopropylatrazine are the major products formed by chemical and biological processes. (cdc.gov)
  • The time varying processes of advection, dispersion, point and diffuse mass loading and boundary exchange are represented in the model. (epa.gov)
  • The duration of summer stratification will increase, adding to the risk of oxygen depletion over greater areas and for longer periods of time. (nalms.org)
  • Little is known about the genetic control of development in animals other than the well-studied genetic model systems Drosophila , Caenorhabditis , Zebrafish and mouse. (otago.ac.nz)
  • The change in caesium activity with time was obtained for the lake and six contributory streams. (europa.eu)
  • Two streams had much higher activity levels than the others and significant relationships with flow and time form the initial Chernobyl fallout. (europa.eu)
  • 10. The system of claim 1 , further comprising a means for hanging the filter container on an aquarium wall. (google.ca)
  • The Desmostylia have only been found in marine deposits and are considered to have been aquatic herbivores, feeding on marine algae and angiosperms ( 3 ). (pnas.org)
  • And the more phosphorus you have built up in your system, the more likely you're going to have nuisance types of algae, and a lot of algae on your hands. (sepro.com)
  • So, the more phosphorus you have, the more you are likely to have a problem with algae in your system. (sepro.com)
  • Algae like green algae may be good for a system, though. (sepro.com)
  • So again, keeping those phosphorus levels low may give those better algae a foothold in the system and be able to outcompete some of the nuisance, noxious, and smelly types that you don't want in there. (sepro.com)
  • It allows the better types of algae to thrive and get those nutrients into the big bass that you want in your system. (sepro.com)
  • 14 ) demonstrated the mixing of bacterial communities in the ETM of the San Joaquin River and San Francisco Bay system by characterizing communities at three sampling stations using denaturing gradient gel electrophoresis (DGGE) of PCR-amplified 16S rDNA. (asm.org)
  • Compositional shifts from these advected communities to a local community should require both bacterial growth and enough time for changes in the relative growth rate (and mortality) of different populations to produce a shift in diversity. (asm.org)
  • Several useful computer programs and other useful information systems are currently available on a CD-ROM format as the Aquatic Plant Information System (APIS). (aquatics.org)
  • To study this we use two model systems, the Honeybee ( Apis mellifera ) and a Rotifer ( Brachionus plicatilis ). (otago.ac.nz)
  • The time-course of uptake and elimination of benzo(a)pyrene (BaP) for the Pacific oyster, Crassostrea gigas and reproduction damage and reproductive outputs were studied. (springer.com)
  • So while aquatic crabs are encumbered with hydrodynamic forces during locomotion, these forces are relatively small compared with the gravitational forces experienced on land. (biologists.org)
  • Furthermore, they alternate between rigid and hydrostatic skeletons, making them an interesting system to examine mechanical adaptations in skeletal support systems. (biologists.org)
  • The unique development of nephrostomes in the mesonephric kidney, the intra-abdominal location of the testes, and the precocious development of the trunk could all have been adaptations to an aquatic lifestyle. (pnas.org)
  • Selje and Simon ( 33 ) used this same technique, but with greater spatial resolution (six sampling stations), in the Weser River estuary and concluded that a distinct microbial community resides in the brackish section of the system. (asm.org)
  • 3 Climate change is reducing annual snow and ice cover, increasing runoff and concentrations of UV-absorbing dissolved organic matter (DOM) in inland and coastal waters, and increasing the strength of thermal stratification in these systems. (rsc.org)
  • While bees and other useful pollinators were a concern at the time, and still are, the supreme effectiveness of these modern insecticides prevented their proscription. (earthtimes.org)
  • A common weapon for managing the Argentine ant has been residual insecticide sprays, insecticides that remain effective for a length of time after being sprayed on a surface. (eurekalert.org)
  • They occur in most major river systems from the Mississippi River to the Suwannee River in Florida and in marine waters of the Central and Eastern Gulf of Mexico south to Florida Bay. (iucnredlist.org)
  • Chatuverdi P, Vanegas DC, Hauser BA, Foster JS, Sepúlveda MS, McLamore ES (2017) Microprofiling real time nitric oxide flux for field studies using a stratified nanohybrid carbon-metal electrode. (purdue.edu)