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).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.Decapoda (Crustacea): The largest order of CRUSTACEA, comprising over 10,000 species. They are characterized by three pairs of thoracic appendages modified as maxillipeds, and five pairs of thoracic legs. The order includes the familiar shrimps, crayfish (ASTACOIDEA), true crabs (BRACHYURA), and lobsters (NEPHROPIDAE and PALINURIDAE), among others.Anomura: An infraorder of CRUSTACEA, in the order DECAPODA comprising the hermit crabs and characterized by a small fifth pair of legs.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.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.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.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.Ectoparasitic Infestations: Infestations by PARASITES which live on, or burrow into, the surface of their host's EPIDERMIS. Most ectoparasites are ARTHROPODS.Brachyura: An infraorder of chiefly marine, largely carnivorous CRUSTACEA, in the order DECAPODA, including the genera Cancer, Uca, and Callinectes.Hepatopancreas: A primitive form of digestive gland found in marine ARTHROPODS, that contains cells similar to those found in the mammalian liver (HEPATOCYTES), and the PANCREAS.Palaemonidae: A family of CRUSTACEA, order DECAPODA, comprising the palaemonid shrimp. Genera include Macrobrachium, Palaemon, and Palaemonetes. Palaemonidae osmoregulate by means of gills.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.Parasitic Diseases, Animal: Infections or infestations with parasitic organisms. The infestation may be experimental or veterinary.Penaeidae: A family of CRUSTACEA, order DECAPODA, comprising the penaeid shrimp. Species of the genus Penaeus are the most important commercial shrimp throughout the world.Mediterranean SeaPhylogeny: The relationships of groups of organisms as reflected by their genetic makeup.Hemolymph: The blood/lymphlike nutrient fluid of some invertebrates.Nephropidae: Family of large marine CRUSTACEA, in the order DECAPODA. These are called clawed lobsters because they bear pincers on the first three pairs of legs. The American lobster and Cape lobster in the genus Homarus are commonly used for food.Genes, Mitochondrial: Genes that are located on the MITOCHONDRIAL DNA. Mitochondrial inheritance is often referred to as maternal inheritance but should be differentiated from maternal inheritance that is transmitted chromosomally.Astacoidea: A superfamily of various freshwater CRUSTACEA, in the infraorder Astacidea, comprising the crayfish. Common genera include Astacus and Procambarus. Crayfish resemble lobsters, but are usually much smaller.Life Cycle Stages: 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.Arthropod Proteins: Proteins synthesized by organisms belonging to the phylum ARTHROPODA. Included in this heading are proteins from the subdivisions ARACHNIDA; CRUSTACEA; and HORSESHOE CRABS. Note that a separate heading for INSECT PROTEINS is listed under this heading.Aquaculture: Cultivation of natural faunal resources of water. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th 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).Rivers: Large natural streams of FRESH WATER formed by converging tributaries and which empty into a body of water (lake or ocean).Population Density: Number of individuals in a population relative to space.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.Sex Ratio: The number of males per 100 females.Biological Evolution: The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics.Extremities: The farthest or outermost projections of the body, such as the HAND and FOOT.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.Fresh Water: Water containing no significant amounts of salts, such as water from RIVERS and LAKES.Fossils: Remains, impressions, or traces of animals or plants of past geological times which have been preserved in the earth's crust.DNA, Mitochondrial: Double-stranded DNA of MITOCHONDRIA. In eukaryotes, the mitochondrial GENOME is circular and codes for ribosomal RNAs, transfer RNAs, and about 10 proteins.BrazilHost-Parasite Interactions: 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.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)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)Biodiversity: The variety of all native living organisms and their various forms and interrelationships.Population Dynamics: The pattern of any process, or the interrelationship of phenomena, which affects growth or change within a population.Evolution, Molecular: The process of cumulative change at the level of DNA; RNA; and PROTEINS, over successive generations.Reproduction: The total process by which organisms produce offspring. (Stedman, 25th ed)Seawater: The salinated water of OCEANS AND SEAS that provides habitat for marine organisms.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)Ovum: A mature haploid female germ cell extruded from the OVARY at OVULATION.Eye: The organ of sight constituting a pair of globular organs made up of a three-layered roughly spherical structure specialized for receiving and responding to light.Larva: Wormlike or grublike stage, following the egg in the life cycle of insects, worms, and other metamorphosing animals.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.Sequence Analysis, DNA: A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis.Animal Shells: The hard rigid covering of animals including MOLLUSCS; TURTLES; INSECTS; and crustaceans.Somites: Paired, segmented masses of MESENCHYME located on either side of the developing spinal cord (neural tube). Somites derive from PARAXIAL MESODERM and continue to increase in number during ORGANOGENESIS. Somites give rise to SKELETON (sclerotome); MUSCLES (myotome); and DERMIS (dermatome).Turtles

Polymorphism in a cyclic parthenogenetic species: Simocephalus serrulatus. (1/744)

A survey of sixteen isozyme loci using electrophoretic techniques was conducted for three isolated natural populations and one laboratory population of the cyclic parthenogenetic species, Simocephalus serrulatus. The proportion of polymorphic loci (33%-60%) and the average number of heterozygous loci per individual (6%-23%) in the three natural populations were found to be comparable to those found in most sexually reproducing organisms. Detailed analyses were made for one of these populations using five polymorphic loci. The results indicated that (1) seasonal changes in genotypic frequencies took place, (2) apomicitic parthenogenesis does not lead to genetic homogeneity, and (3) marked gametic disequilibrium at these five loci was present in the population, indicating that selection acted on coadapted groups of genes.  (+info)

Novel regulation of the homeotic gene Scr associated with a crustacean leg-to-maxilliped appendage transformation. (2/744)

Homeotic genes are known to be involved in patterning morphological structures along the antero-posterior axis of insects and vertebrates. Because of their important roles in development, changes in the function and expression patterns of homeotic genes may have played a major role in the evolution of different body plans. For example, it has been proposed that during the evolution of several crustacean lineages, changes in the expression patterns of the homeotic genes Ultrabithorax and abdominal-A have played a role in transformation of the anterior thoracic appendages into mouthparts termed maxillipeds. This homeotic-like transformation is recapitulated at the late stages of the direct embryonic development of the crustacean Porcellio scaber (Oniscidea, Isopoda). Interestingly, this morphological change is associated with apparent novelties both in the transcriptional and post-transcriptional regulation of the Porcellio scaber ortholog of the Drosophila homeotic gene, Sex combs reduced (Scr). Specifically, we find that Scr mRNA is present in the second maxillary segment and the first pair of thoracic legs (T1) in early embryos, whereas protein accumulates only in the second maxillae. In later stages, however, high levels of SCR appear in the T1 legs, which correlates temporally with the transformation of these appendages into maxillipeds. Our observations provide further insight into the process of the homeotic leg-to-maxilliped transformation in the evolution of crustaceans and suggest a novel regulatory mechanism for this process in this group of arthropods.  (+info)

Changes in physiological parameters and feeding behaviour of Atlantic salmon Salmo salar infected with sea lice Lepeophtheirus salmonis. (3/744)

Atlantic salmon Salmo salar L. artificially infected with salmon lice Lepeophtheirus salmonis (Kroyer 1837) recovered from detrimental physiological changes and skin damage induced by preadult lice as the parasites matured. Growth rates of Atlantic salmon remained unaffected by lice infection, but food consumption decreased with increasing feeding and movement of the lice prior to and post-mating, correlating with the appearance of head erosions and detrimental changes in physiological integrity. Food consumption of the fish increased as the lice moulted to the adult stage and gravid female lice settled in a posterior location on the fish, subsequently reducing the impact of infection and allowing recovery of the skin damage. However, the impact of preadults was limited, as the decrease in food consumption of fish at 21 d post-infection had no effect on either the specific growth rate or condition factor of the fish. Furthermore, the intensity of lice infections at each of the sample days was not correlated with food consumption, specific growth rate or any of the haematological or physiological parameters measured, either before or after infection, indicating that lice intensity was independent of social dominance/subordinance. This work has provided the first evidence that infected fish can recover from the detrimental changes caused by lice infection, even when they are still infected with lice. If fish can survive the preadult stage of lice, then the mortal impact of lice infections is greatly reduced.  (+info)

Extent of gill pathology in the toadfish Tetractenos hamiltoni caused by Naobranchia variabilis (Copepoda: Naobranchiidae). (4/744)

Sanguinivorous Naobranchia variabilis prefer the first gill arch, external hemibranch and anterior end of the gill arch. The smallest N. variabilis observed attached to fish by a thin filament which connects fused tips of second maxillae to a 'plug' inserted into the gill tissue. Second maxillae enlarge to encircle and increasingly compress the gill filament, which results in a thin layer of epithelium and connective tissue overlying the cartilaginous supporting bar. Early juveniles cause little tissue proliferation, but the extent of proliferated epithelial and connective tissue (PR) adjacent to the maxillae increases from late juveniles to subadult and adult copepods. Most variation in length of gill filament damage (PL, proliferated and compressed tissue) among age classes is explained by maxilla length (ML, length of compressed gill filament); adult trunk width (TRW) explains an extra, small amount of variation, but not trunk length (TRL) or total fish length (TL). Most variation in ML is explained by TRW of adults, subadults and late juveniles, and TRL of early juveniles. PR is explained by TRW for adults, but by ML for other ages. These patterns are due to elongation of the juvenile trunk during growth and lateral expansion of adult egg pouches during maturation. Up to 38 N. variabilis, average (avg.) = 9.3, infected individual Tetractenos hamiltoni and damaged up to 3.4% (avg. 0.72%) of total filament length and 8.6% (avg. 2.1%) of gill filaments per fish.  (+info)

Regional specification during embryogenesis in the inarticulate brachiopod Discinisca. (5/744)

The process of embryogenesis is described for the inarticulate brachiopod Discinisca strigata of the family Discinidae. A fate map has been constructed for the early embryo. The animal half of the egg forms the dorsal ectoderm of the apical and mantle lobes. The vegetal half forms mesoderm and endoderm and is the site of gastrulation; it also forms the ectoderm of the ventral regions of the apical and mantle lobes of the larva. The plane of the first cleavage goes through the animal-vegetal axis of the egg along the future plane of bilateral symmetry of the larva. The timing of regional specification in these embryos was examined by isolating animal, vegetal, or lateral regions at different times from the 2-cell stage through gastrulation. Animal halves isolated at the 8-cell and blastula stages formed an epithelial vesicle and did not gastrulate. When these halves were isolated from blastulae they formed the cell types typical of apical and mantle lobes. Vegetal halves isolated at all stages gastrulated and formed a more or less normal larva; the only defect these larvae had was the lack of an apical tuft, which normally forms from cells at the animal pole of the embryo. When lateral isolates were created at all developmental stages, these halves gastrulated. Cuts which separated presumptive anterior and posterior regions generated isolates at the 4-cell and blastula stages that formed essentially normal larvae; however, at the midgastrula stage these halves formed primarily anterior or posterior structures indicating that regional specification had taken place along the anterior-posterior axis. The plane of the first cleavage, which predicts the plane of bilateral symmetry, can be shifted by either changing the cleavage pattern that generates the bilateral 16-cell blastomere configuration or by isolating embryo halves prior to, or during, the 16-cell stage. These results indicate that while the plane of the first cleavage predicts the axis of bilateral symmetry, the axis is not established until the fourth cleavage. The development of Discinisca is compared to development in the inarticulate brachiopod Glottidia of the family Lingulidae and to Phoronis in the phylum Phoronida.  (+info)

Natural copepods are superior to enriched artemia nauplii as feed for halibut larvae (Hippoglossus hippoglossus) in terms of survival, pigmentation and retinal morphology: relation to dietary essential fatty acids. (6/744)

Replicate groups of halibut larvae were fed to d 71 post-first feeding (PFF) either the marine copepod, Eurytemora velox, or Artemia nauplii doubly enriched with the marine chromist or golden algae, Schizochytrium sp., (Algamac 2000) and a commercial oil emulsion (SuperSelco). The fatty acid compositions of eyes, brains and livers from larvae fed the two diets were measured, and indices of growth, eye migration and skin pigmentation were recorded along with histological examinations of eye and liver. The docosahexaenoic acid [22:6(n-3); DHA]/eicosapentaenoic acid [20:5(n-3); EPA] ratios in Artemia nauplii enriched with the SuperSelco and Algamac 2000 were 0.4 and 1.0, respectively. The E. velox copepods were divided into two size ranges (125-250 and 250-400 microm) with the smaller size range containing the highest level of (n-3) highly unsaturated fatty acids (HUFA). The DHA/EPA ratios for the two size ranges of copepods were 2.0 and 0.9, respectively. The total lipids of eyes, brains and livers of larvae fed copepods had higher levels of DHA and lower levels of EPA than those of larvae fed enriched Artemia. The percentage of survival of the halibut larvae was significantly higher when copepods rather than enriched Artemia nauplii were fed, but larval specific growth rates did not differ. The indices of eye migration were high and not significantly different in larvae fed the two diets, but the percentage of larvae undergoing successful metamorphosis (complete eye migration and dorsal pigmentation) was higher in larvae fed copepods (40%) than in larvae fed enriched Artemia (4%). The rod/cone ratios in histological sections of the retina were 2.5 +/- 0.7 in larvae fed copepods and 1.3 +/- 0.6 in larvae fed enriched Artemia (P < 0.01). Histological examination of the livers and intestines of the larvae were consistent with better assimilation of lipid from copepods than lipid from Artemia nauplii up to 46 d post-first feeding. Thus, marine copepods are superior to enriched Artemia as food for halibut larvae in terms of survival, eye development and pigmentation, and this superiority can be related to the level of DHA in the feed.  (+info)

Polymorphism and evolution of collagenolytic serine protease genes in crustaceans. (7/744)

Two genomic DNA fragments encoding crustacean collagenolytic serine protease genes show coding fragments that span 1522-1526 base pairs and contain seven exons encoding the complete amino acid sequence of two enzymes, CHYA and CHYB. As in serine protease genes from other organisms, the region coding for the residues around the active site is split by two introns. Although the introns differ from those of other organisms in size and nucleotide sequence, their number and location are more or less the same as found in mammalian chymotrypsin or elastase genes that evolved lately, but different for trypsin genes. Meanwhile, the junction that occurs between the propeptide and the maturation site is only found in the shrimp genes. This is also the case for the junction located 13 amino acids after the active site aspartic acid in these genes. Between 40 and 50 copies of the genes are reported by Southern analysis. Seven different genes within ChyA Pv family present 0-6% base changes, whereas five different genes belonging to ChyB Pv family show changes of up to 27% in the short studied portion of exon 4. This last family presents a mosaic organization of the coding parts, which are also expressed in the hepatopancreas of the shrimp as the variant PVC5 cDNA.  (+info)

The structure of a glycosylated protein hormone responsible for sex determination in the isopod, Armadillidium vulgare. (8/744)

Two glycoforms (AH1 and AH2) of androgenic hormone, and its corresponding hormone precursor derived from HPLC-purified androgenic gland extract from the woodlouse Armadillidium vulgare were fully characterized by microsequencing and mass spectrometry. The amino-acid sequences of the two glycoforms were identical; they consist of two peptide chains, A and B, of 29 and 44 amino acids, respectively, with chain A carrying one N-glycosylated moiety on Asn18. The two chains are linked by two disulfide bridges. Glycoforms were only differentiated by the size and heterogeneity of the glycan chain. The androgenic hormone precursor (16.5 kDa) was shown to contain the sequence of chains A and B from the androgenic hormone, connected by a C-peptide (50 amino acids). These results were confirmed by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) analysis performed on a single hypertrophied androgenic gland. When injected into young females, both glycoforms of the androgenic hormone were able to override genetic sex-determination. In invertebrates, there is no other example where sex-differentiation is controlled by a protein hormone that is not synthesized by the gonads but by a special gland. A functional comparison with two other hormones which are believed to play a role in sex determination, i.e. ecdysone in insects and anti-Mullerian hormone in mammals, is presented. Work is in progress to clone and characterize the gene encoding androgenic hormone, moreover special attention is devoted to its regulatory regions, putative targets for the Wolbachia action.  (+info)

*Calothrix crustacea

... is a species of bacteria that is widespread in oceans worldwide. Unusually for bacteria, the filaments of ... "Calothrix crustacea Schousb. ex Thur". Soft-Bodied Stream Algae of California. Retrieved 13 January 2017. ... "Calothrix crustacea". WetlandInfo, Department of Environmental and Heritage Protection, Queensland. Retrieved 13 January 2017 ...

*Crustacean

Crustacea: University of Edinburgh Crustaceans (Crustacea) on the shore of Singapore Crustacea(crabs, lobsters, shrimps, prawns ... 5. Crustacea.net, an online resource on the biology of crustaceans Crustacea: Natural History Museum of Los Angeles County ... Marine crustaceans are as ubiquitous in the oceans as insects are on land. The majority of crustaceans are also motile, moving ... Some crustaceans are more closely related to insects and other hexapods than they are to certain other crustaceans. The 67,000 ...

*Crustacean larva

Crustaceans portal Ichthyoplankton Marine larval ecology Robert Gurney (1942). Larvae of decapod crustacea (PDF). London: Ray ... The larvae of crustaceans often bear little resemblance to the adult, and there are still cases where it is not known what ... Young isopod crustaceans hatch directly into a manca stage, which is similar in appearance to the adult. The lack of a free- ... Every other crustacean group with free larvae shows a metamorphosis, and this difference in the larvae is thought to reflect "a ...

*Alona (crustacean)

Kay Van Damme, Alexey A. Kotov & Henri J. Dumont (2010). "A checklist of names in Alona Baird 1843 (Crustacea: Cladocera: ... Kay Van Damme & Henri J. Dumont (2007). "The 'true' genus Alona Baird, 1843 (Crustacea: Cladocera: Anomopoda): position of the ...

*Polyphemus (crustacean)

Crustacea)". Proceedings of the Royal Society of London. Series B, Biological Sciences. 217 (1207): 177-189. doi:10.1098/rspb. ... Crustacea, Onychopoda)". Molecular Ecology. 18 (24): 5161-5179. doi:10.1111/j.1365-294X.2009.04422.x. P. D. Mordukhai- ...

*Crustacean Records

In Music We Trust - Crust-O-Matic: Crustacean Records comp The Isthmus - Crustacean Records: Label on the loose Isthmus , The ... Rich Albertoni summed up Crustacean's effect on the Wisconsin rock scene by saying, "It's history because Crustacean has gone ... Three Madison bands on Crustacean Records gear up for SXSW 2008 Official website Crustacean MySpace. ... To date Crustacean has released over 80 records in 16 years solidifying its place as one of Wisconsin's most important and ...

*Gmelina (crustacean)

Gmelina is a genus of crustaceans of the family Gammaridae, containing two species: Gmelina aestuarica Carausu, 1943 Gmelina ...

*Scylla (crustacean)

Scylla is a genus of swimming crabs, comprising four species, of which S. serrata is the most widespread. They are found across the Indo-West Pacific. The four species are: Scylla olivacea (Herbst, 1796) Scylla paramamosain Estampador, 1949 Scylla serrata (Forskål, 1775) Scylla tranquebarica (Fabricius, 1798) Peter K. L. Ng, Danièle Guinot & Peter J. F. Davie (2008). "Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world" (PDF). Raffles Bulletin of Zoology. 17: 1-286. L. Le Vay (2001). "Ecology and management of mud crab Scylla spp". Asian Fisheries Science. 14: 101-111 ...

*Dardanus (crustacean)

Dardanus is a genus of hermit crabs belonging to the Diogenidae family. This genus contains the following species: Dardanus arrosor (Herbst, 1796) Dardanus aspersus (Berthold, 1846) Dardanus australis Forest & Morgan, 1991 Dardanus brachyops Forest, 1963 Dardanus calidus (Risso, 1827) Dardanus callichela Cook, 1989 Dardanus corrugatus Cook, 1989 Dardanus crassimanus (H. Milne-Edwards, 1836) Dardanus dearmatus Henderson, 1888 Dardanus deformis H. Milne-Edwards, 1836 Dardanus fucosus Biffar & Provenzano, 1972 Dardanus gemmatus (H. Milne-Edwards, 1836) Dardanus guttatus (Olivier, 1812) Dardanus hessii (Miers, 1884) Dardanus imbricatus (H. Milne-Edwards, 1848) Dardanus imperator (Miers, 1881) Dardanus impressus (De Haan, 1849) Dardanus insignis (de Saussure, 1858) Dardanus jacquesi Asakura & Hirayama, 2002 Dardanus janethaigae Ayon & Hendrickx, 2009 Dardanus jordani Schmitt, 1921 Dardanus lagopodes (Forskål, 1775) Dardanus longior Asakura, 2006 Dardanus magdalenensis Ayon & Hendrickx, 2009 Dardanus ...

*Pontogeneia (crustacean)

Pontogeneia is a genus of amphipods in the family Pontogeneiidae. It contains the following species: Pontogeneia andrijashevi Gurjanova, 1951 Pontogeneia arenaria Bulycheva, 1952 Pontogeneia bartschi Shoemaker, 1948 Pontogeneia inermis (Kroyer, 1838) Pontogeneia intermedia Gurjanova, 1938 Pontogeneia ivanovi Gurjanova, 1951 Pontogeneia kondakovi Gurjanova, 1951 Pontogeneia littorea Ren, 1992 Pontogeneia melanophthalma Gurjanova, 1938 Pontogeneia opata J. L. Barnard, 1979 Pontogeneia redfearni Thurston, 1974 Pontogeneia rostrata Gurjanova, 1938 Pontogeneia stocki Hirayama, 1990 Claude De Broyer, Mark Costello & Denise Bellan-Santini (2011). Lowry J, ed. "Pontogeneia Boeck, 1871". World Amphipoda database. World Register of Marine Species. Retrieved December 2, 2011 ...

*Cyzicus (crustacean)

Cyzicus is a genus of clam shrimps in the family Cyzicidae. Identified by Jean Victoire Audouin in 1837, the genus was reidentified as Caenestheriella by Eugen von Daday in 1910. There are seven species in the genus: Cyzicus belfragei (Packard, 1871) - Belfrage clam shrimp Cyzicus californicus (Packard, 1883) - California clam shrimp Cyzicus elongatus (Mattox, 1957 - elongate clam shrimp Cyzicus gynecia (Mattox, 1949) - Mattox clam shrimp Cyzicus mexicanus (Claus, 1860) - Mexican clam shrimp Cyzicus morsei (Packard, 1883) - Morse clam shrimp Cyzicus setosa (Pearse, 1912) - setose clam shrimp "Cyzicus Audouin, 1837". Integrated Taxonomic Information System. Retrieved 6 April 2013 ...

*Pain in crustaceans

Opioids may moderate pain in crustaceans in a similar way to that in vertebrates. If crustaceans feel pain, there are ethical ... the crustacean is alive and fully conscious Placing crustaceans in slowly heated water to the boiling point Placing crustaceans ... food preparation and for crustaceans used in scientific research. The possibility that crustaceans and other non-human animals ... For example, crustaceans living in an aquatic world can maintain a certain level of buoyancy, so the risk of collision due to ...

*Crustacean neurohormone family

In molecular biology, the crustacean neurohormone family of proteins is a family of neuropeptides expressed by arthropods. The ... "Molecular biology of neurohormone precursors in the eyestalk of Crustacea". Comp. Biochem. Physiol. B, Biochem. Mol. Biol. 112 ... family includes the following types of neurohormones: Crustacean hyperglycaemic hormone (CHH). CHH is primarily involved in ...

*Crustacean cardioactive peptide

CCAP is one of several peptides and hormones to be involved in the moulting process of crustaceans and insects. There have been ... Crustacean cardioactive peptide (CCAP) is a highly conserved, amidated cyclic nonapeptide with the primary structure PFCNAFTGC- ... It is found in crustaceans and insects where it behaves as a cardioaccelerator, neuropeptide transmitter for other areas of the ... J. Stangier; C. Hilbich; R. Keller (1989). "Occurrence of crustacean cardioactive peptide (CCAP) in the nervous system of an ...

*Journal of Crustacean Biology

The Journal of Crustacean Biology is a quarterly peer-reviewed scientific journal in the field of carcinology (crustacean ... T. Spears (2005). "Frederick Robert Schram named editor of Journal of Crustacean Biology - Announcement". Journal of Crustacean ... "The first 30 years of the Journal of Crustacean Biology - systematics and evolution". Journal of Crustacean Biology. 30 (4): ... Bernard Sainte-Marie (2010). "The first 30 years of the Journal of Crustacean Biology - a bibliometric study". Journal of ...

*List of crustaceans of Montana

Crustaceans (Crustacea) form a very large group of arthropods, usually treated as a subphylum, which includes such familiar ... Most crustaceans are free-living aquatic animals, but some are terrestrial (e.g. woodlice), some are parasitic (e.g. fish lice ... More than 10 million tons of crustaceans are produced by fishery or farming for human consumption, the majority of it being ... There are at least 30 species of crustaceans found in Montana. The Montana Department of Fish, Wildlife and Parks has ...

*List of crustaceans of Ireland

There are 1,774 species of crustaceans recorded in Ireland. Crustaceans are arthropods of the subphylum Crustacea. Most are ... ie/reading-room/environment-geography/marine-environment/irelands-ocean-environmen/invertebrate-life/crustacea/ "SShore Angling ... finds 207 species in Ireland for Subphylum Crustacea. ...

*List of U.S. state crustaceans

"Maine State Crustacean". Maine Kids. Retrieved July 8, 2017. "Texas State Crustacean". StateSymbolsUSA. Retrieved July 8, 2017 ... The blue crab, Callinectes sapidus was chosen as the state crustacean of Maryland in 1989. C. sapidus is a crab found in the ... "Procambarus clarkii (crustacean)". Global Invasive Species Database. March 31, 2006. Retrieved January 31, 2010. Larry W. de la ... How to Season a Crawfish Boil "Blue Crab, Maryland State Crustacean". Maryland Manual on-line: a Guide to Maryland Government. ...

*List of decapod crustaceans of Dominica

Thirty-two species of decapod crustaceans have been recorded in Dominica, an island nation in the Caribbean Lesser Antilles. ... Horton H. Hobbs (1969). "The freshwater and terrestrial decapod crustaceans of the West Indies with special reference to ...

*List of crustaceans of the Indiana Dunes

A first attempt was made to create a list of crustaceans present in the Lakeshore area. Further research is required to ... Missing or empty ,title= (help) Crustaceans portal. ...

*A White Sport Coat and a Pink Crustacean

All of the songs on A White Sport Coat and a Pink Crustacean were written or co-written by Buffett. The most well-known song of ... A White Sport Coat and a Pink Crustacean is the third studio album by American singer-songwriter Jimmy Buffett and the first ... Although it was not extremely commercially successful at the time of its release, A White Sport Coat and a Pink Crustacean is ... "A White Sport Coat and a Pink Crustacean" as his first album. It was initially released on June 4, 1973 as Dunhill DS-50150 and ...

*Xandarovula patula

Crustacea. Mollusca. Testacea: i-viii, 1-154, Plates 1-93. London, page 117. Xandarovula patula (Pennant, 1777). Gofas, S. ( ...

*List of flora and fauna of Montana

Crustaceans of Montana There are at least 30 species of crustaceans found in Montana. Fish of Montana There are at least 31 ... "Crustacea". Montana Field Guide. Montana Department of Fish, Wildlife and Parks. Retrieved December 8, 2010. "Montana Field ...

*William Macnae

Papers and books published by MacNae include: Macnae, W. (1939). Crustacea. In: Bertram, D.S. (ed.). Natural History of Canna ...

*Amphipoda

Compared to other crustacean groups, such as the Isopoda, Rhizocephala or Copepoda, relatively few amphipods are parasitic on ... Crustaceans portal WoRMS (2014). Lowry J, ed. "Amphipoda". World Amphipoda database. World Register of Marine Species. ... Crustacea: Amphipoda)" (PDF). Zootaxa. 3610 (1): 1-80. doi:10.11646/zootaxa.3610.1.1. WoRMS (2013). Lowry J, ed. "Senticaudata ... They are the only parasitic crustaceans which cannot swim during any part of their life cycle. Most amphipods are detritivores ...
A study on the distribution of ostracods in small freshwater habitats of the province of Parma was conducted from May 2004 to December 2005. Vernal pools, ponds, shallow lakes, fountains, springs, ditches, canals, and streams were among the most common types of aquatic systems included in this survey. Altogether, 90 sites located between 24 and 1557 m a.s.l. were visited, and 125 samples were collected. 41 samples did not contain ostracods, and 7 samples were not considered because only immature specimens or empty valves were found. Consequently, 77 samples from 58 sites were analysed. Whenever possible, ostracod identification was done at the species level based on the morphology of both valves and limbs. Thirty-eight taxa from 20 genera belonging to the families Candonidae, Ilyocyprididae, Cyprididae, and Notodromadidae were recorded. This roughly accounts for one-third of the estimated number of non-marine ostracod species in Italy. Scanning electron microscopy images of valves are provided. ...
The Stomatopoda make up an order of crustaceans that have evolved for more than 400 million years since they emerged from their haplocarid ancestors. In previous phylogenetic studies based on morphological characters, seven superfamilies and 19 families were erected for more than 400 extant stomatopod species. Prior to this study, no effort was made to investigate the interrelationships among stomatopod superfamilies using molecular markers. In this study, 18s rDNA, 28s rDNA, and COI genes of 25 stomatopod species from 10 families and four superfamilies were sequenced to build a molecular phylogeny for these stomatopods. Whereas some interfamilial relationships are in congruence with previous studies, the deep structure of the fully resolved molecular phylogeny reconstructed in the present study is fundamentally different. Two previously proposed sister clades, the smashers and the spearers, were collapsed in the molecular tree. Hemisquilidae, other than closely related to other families from ...
This project examined the trace-element and stable-isotope composition of non-marine ostracod shells and their use in Holocene palaeoclimate reconstruction, with particular reference to mid-latitude shallow carbonate lakes. Controls on the chemical composition of shells from such environments were studied. Results were used to test the application of ostracod shell chemistry data to palaeoclimate reconstruction. Selected techniques were applied to a high resolution study of Holocene lake marl sequence. The project investigated influences on shell chemistry during formation, sedimentary deposition and extraction. A core covering approximately 9,450 to 5,800 Cal. Yr BP was taken from Cunswick Tarn, Cumbria, yielding ostracod faunal and shell chemistry data used to produce a palaeoclimate interpretation for the early Holocene. This interpretation agreed with studies showing a warm, dry early Holocene and a cooler, wetter mid-Holocene. Seasonal sampling of water and ostracods at Cunswick Tarn ...
The distribution of sexual reproduction of the geographic parthenogen Eucypris virens (Crustacea: Ostracoda) matches environmental gradients in a temporary ...
Llandeilo and Caradoc beyrichiocope Ostracoda are described from England and Wales. They are referred to 3 suborders (Palaeocopa, Binodicopa, Eridostraca), 8 families (Eurychilinidae. Ctenonotellidae. Tetradellidae (with 1 new subfamily); Bolliidae, Aechminidae, Circulinidae and Spinigeritidae; Eridoconchidae). 38 genera (7 new and 2 new subgenera) and 52 named species (35 new). Thirteen other forms are referred mainly to the Palaeocopa under open nomenclature, or are simply recorded. Sampling was concentrated on the sandstone/limestone sequences of Llandeilo and Caradoc age of South Wales. Superbly preserved silicified faunas were extracted using acid techniques. Casting methods extended sampling into the predominantly sandy facies of Caradoc age of the Welsh Bc.;erland, North Wales and northern England. Largely neglected,these ostracode mould faunas have provided an excellent source of material. Scanning electron microscopy has been extensively employed to illustrate the ostracodes recovered. ...
Hehemann, J. H. , Redecke, L. , Betzel, C. and Saborowski, R. (2007): Digestive enzymes from marine crustaceans as potential tools for biotechnological applications , 8th International Marine Biotechnolgy Conference, 11 - 16 March 2007, Eilat, Israel ...
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Maxillopoda. Ostracoda. Malacostraca. Crustaceans (Crustacea) form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at 0.1 mm (0.004 in), to the Japanese spider crab with a leg span of up to 12.5 ft (3.8 m) and a mass of 44 lb (20 kg). Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates by the possession of biramous (two-parted) limbs, and by the nauplius form of the larvae.. Most crustaceans are free-living aquatic animals, but some are terrestrial (e.g. woodlice), some are parasitic (e.g. fish lice, tongue worms) and some are sessile (e.g. barnacles). The group has an extensive fossil record, reaching back to the Cambrian, and includes living fossils such as Triops cancriformis, which ...
Definition of Crustacea in the Get a Grip America. Meaning of Crustacea with illustrations and photos. Pronunciation of Crustacea and its etymology. Related words - Crustacea synonyms, antonyms, hypernyms and hyponyms. Example sentences containing Crustacea
How to Identify Malacostraca of Arthropoda? How Malacostraca are classified? Systematics of Malacostraca, What is a Malacostraca? Overview of the Class
The name Triops comes from the Greek τρία (tría) meaning "three" and ὤψ (ops) meaning "eye".[7] The head of Triops longicaudatus bears a pair of dorsal compound eyes that lie close to each other and are nearly fused together. The compound eyes are generally sessile (not stalked). In addition, there is a naupliar ocellus (the "third eye") between them. The compound eyes are on the surface of the head, but the ocellus is deep within the head. All the eyes, however, are easily visible through the shell covering of the head.. Franz von Paula Schrank was the first author to use the genus name Triops,[8] coining it in his 1803 work on the fauna of Bavaria. Their German name was Dreyauge, which means three-eye in English. He collected and described specimens from the same locality in Regensburg from which Schäffer, another naturalist who had studied the Notostraca, obtained his specimens in the 1750s. However, other authors, starting with Louis Augustin Guillaume Bosc, had adopted the genus ...
The Crustacea are a subphylum of pancrustaceans with 50,000 described species. They are part of the phylum Arthropoda. Crustaceans include crabs, lobsters, crayfish, shrimp, krill and barnacles. They are relatives of insects. If the Arthropods are regarded as a superphylum, then the insects and crustaces would be phyla. (see List of animal phyla). The group has an extensive fossil record, reaching back to the Cambrian.. Most crustaceans are aquatic, mostly marine. Some have moved onto land permanently. Crustaceans that live on land include some crabs, and woodlice. Crustacea range in size from a parasite 0.1mm long, to the Japanese spider crab with a leg span of up to 14 ft (4.3 m) and a mass of 44 lb (20 kg). The North Atlantic lobster can weigh more than 40 pounds.. Most crustaceans are mobile, but some become sessile after their larval stage. Barnacles become attached to rocks on thesea shore. Some are parasitic, like fish lice, and tongue worms. Crustacea usually have separate sexes, and the ...
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Ecological and biogeographical studies of Neotropical non-marine ostracods are rare, although such information is needed to develop reliable paleoecological and paleoclimatic reconstructions for the r
Cruise plan for RV Squilla SQ990802 - produced from a first level inventory of measurements and samples collected at sea that provides information on who has collected what, where and when. Assembled initially from cruise plans and then updated from other sources including the Intergovernmental Oceanographic Commission (IOC) Cruise Summary Report (ROSCOP) forms submitted to BODC for each UK research cruise. Provides a useful resource of cruise activities to scientists, programme managers and data managers.
Cruise plan for RV Squilla SQ011029 - produced from a first level inventory of measurements and samples collected at sea that provides information on who has collected what, where and when. Assembled initially from cruise plans and then updated from other sources including the Intergovernmental Oceanographic Commission (IOC) Cruise Summary Report (ROSCOP) forms submitted to BODC for each UK research cruise. Provides a useful resource of cruise activities to scientists, programme managers and data managers.
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TY - JOUR. T1 - Analysis of the expression pattern of Mysidium columbiae wingless provides evidence for conserved mesodermal and retinal patterning processes among insects and crustaceans. AU - Duman-Scheel, Molly. AU - Pirkl, Nicole. AU - Patel, Nipam H.. PY - 2002/12/1. Y1 - 2002/12/1. N2 - The Wnt family includes a number of genes, such as wingless (wg), which encode secreted glycoproteins that function in numerous developmental patterning processes. In order to gain a better understanding of crustacean pattern formation, a wg orthologue was cloned from the malacostracan crustacean Mysidium columbiae (mysid), and the expression pattern of this gene was compared with that of Drosophila wg. Although Drosophila wg is expressed in many developing tissues, such as the ventral neuroectoderm, M. columbiae wg (mcowg) expression is detected within only a subset of these tissues. mcowg is expressed in the dorsal part of each developing segment and within the developing eye, but not within the ventral ...
Barnacle: Barnacle, any of more than 1,000 predominantly marine crustaceans of the subclass Cirripedia highly modified for sedentary life. There are about 850 free-living species (all marine) and about 260 species that are internal parasites of crabs and other crustaceans. A brief treatment of cirripedes
An introduction to the biology, classification and ecology of prawns, shrips crabs lobsters and their allies, the subphylum Crustacea
For the ostracode analysis, a total of 87 samples were selected at intervals of ca. 10 cm between 0 to 865 cm depth. Due to the lack of ostracode valves, the lower part (980 865 cm) of the sediment sequence was not included in the study. The samples were oven dried at 50 °C and weighed to determine their dry weights. Sediments were disintegrated by soaking in water for 2 3 days and washed through two sieves of 0.063 mm and 0.425 mm to collect sediment with ostracode valves and eliminate the finer sediments. The residues were oven dried at 50 °C and examined under an Olympus SZX FOF stereoscopic microscope to identify the species and calculate their abundance according to the descriptions provided by Van Morkhoven (1963), Delorme (1971 a, b, c), Forester (1985) and Carreño (1990). The total ostracode abundance in each sample was calculated by adding the number of adult and juvenile valves of all the observed species. The number of adult valves of each species was counted in 10 g of dry ...
Light-evoked intracellular voltage noise records have been obtained from Limulus eccentric cells, from threshold light intensity to an intensity .10(5) times threshold. These data are analyzed in terms of a simple "adapting-bump" noise model. It is shown how the model yields a data reduction procedure that slightly generalizes the familiar use of Campbells theorem for Poisson shot noise: the correlative effect of adaptation amends Campbells theorem by a single multiplicative factor, which may be estimated directly from the power spectrum of the noise data. The model also permits direct estimation of the bump shape from the power spectrum. The bump shape estimated from noise at dim light is in excellent agreement with the average shape of bumps observed directly in the dark. The data yield a bump rate that is linear with light up through about 50 times threshold intensity but that falls short of linearity by a factor of 35 at the brightest light. The bump height decreases as the -0.4 power of ...
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When the nervous system receptor is resting (not being stimulated) there is a difference in charge inside and outside the cell. The difference in voltage is called the potential difference. The potential difference when the cell is at rest is called the resting potential. When a stimulus is detected the membrane becomes more permeable, so ions move in and out of the cell, altering the potential difference, this change in potential difference is called generator potential. The larger the stimulus the larger the generator potential. If the generator potential is large enough it will trigger an action potential, this is an electrical impulse along a neurone. This only happens if the generator potential reaches a certain level called the threshold level ...
Current production (ca. 14 million metric tonnes) and value (up to $60 billion) for crustaceans is significant and likely to increase further during the 21st century. Satisfactory management and handling of live crustaceans is important to safeguard the value, security, safety, and sustainability of wild-caught and aquaculture-sourced fisheries, and increasingly to foster improved welfare and public perception of both industries. Decapod crustaceans are frequently transported live and internationally over long distances, and experience anthropogenic stressors from point of capture to point of sale. Physical handling, emersion in air, and temperature fluctuations are key examples of stressors, which elicit progressive behavioral, physiological and immunological stress responses in crustaceans. Stress responses are initiated to return the individual to a state of homeostasis; if these fail, then physiological collapse, a loss of vitality and death will likely occur. There are several ways to ...
LOBSTERS: Invertebrates of the NEPHROPIDAE family of marine crustaceans that existed up to 140 million years ago. In order to grow they shed their exoskeleton up to 25 times in the first 5 - 10 years until adulthood, then once a year if male and once every two years if female. They li...
Found in offshore sediments (Ref. 84225). Members of the class Ostracoda are gonochoric. Sperm transfer is direct. During copulation, male clasps the female dorsally and posteriorly and later on injects its penis between the valves of the female. Eggs may either be attached to a substratum or brooded, where they grow and hatch as nauplii (Ref. 833). ...
basis of record Horne, D.J.; Bruce, A.; Whittaker, J.E. (2001). Ostracoda, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 244-251 (look up in IMIS) [details] ...
Shells ; Mollusks ; Clams ; Corals ; Abalones ; Gasteropoda ; Mussels ; Marine biology ; Cowries ; Sea horses ; Sand-crabs ; Sponges ; Ostracoda ; Sea urchins ; Crabs ; Starfishes ; Biological ...
Brandão, Simone-N. (2014). Bradleya (Quasibradleya) paradictyonites Benson, 1972. In: Brandão, S. N.; Angel, M. V.; Karanovic, I.; Perrier, V. & Yasuhara, M. (2017). World Ostracoda Database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=517537 on 2017-12- ...
DOI: /v ANNALES UNIVERSITATIS MARIAE CURIE-SKŁODOWSKA LUBLIN POLONIA VOL. XXX (1) SECTIO EE 2012 Department of Biochemistry and Toxicology University of Life Sciences in Lublin,
clam shrimp: Any member of the crustacean order Conchostraca (subclass Branchiopoda), a group of about 200 species inhabiting shallow freshwater lakes, ponds, and temporary pools throughout...
Fig. 137. - Morphology of Lobster. 1. Lobster, with all the appendages, except the terminal swimmerets, removed, and the abdominal somites separated from one another : ca Carapace; t Telson. 2. Th...
GenDR A curated database of genes associated with dietary restriction in model organisms either from genetic manipulation experiments or gene expression profiling.. ...
Crustaceans include familiar fresh and salt water arthropods as crabs, lobsters, crayfish, and shrimp. More than 10 million tons of crustaceans are produced by fishery or farming…
Part of a complete English translation. Very large site on ancient Rome contains many Greek and Latin texts, translations and related material.
George describes the process of making cider and the technique for laying and maintaining a hedge. The original recording appears to have been paused on one occasion.
Support for making changes to live a healthy lifestyle, information on mental health, healthy eating, exercise, stopping smoking, flu vaccinations, support services, and volunteering opportunities with the Healthy Living Network
Detailed nutritional values of Crustaceans, shrimp, untreated, raw natural. Online analysis information with non-nutrients and nutrients composition facts table for item No. 15270 found in category Finfish and Shellfish Products. Data contents chart for nutritionists. Food details for CRUSTACEANS,SHRIMP,UNTREATED,RAW in different kinds of quantities, amounts or measurements.
Die Ostrakodenfauna des Interglazialbeckens Neumark-Nord (Geiseltal) und ihre Aussage zu den Umweltbedingungen der Großsäugerfundschichten, zum Klima sowie zur stratigraphischen Stellung // The Ostracods fauna of the interglacial basin of Neumark-Nord (Geiseltal) and its information regarding environmental conditions of the large mammals finds layers, climate and the stratigraphic position Teil 5 // Part ...
TABLE 3. Mean numbers/1000 m3 with the standard deviations of the more important ostracod species for the four depth zones in the no. 2 and no. 8 ...
Pris: 927 kr. H ftad. 2006. Skickas fr n oss inom 2-5 vardagar. A detailed investigation of PhosphatocopinaFossils and Strata, Number 49: Morphology, Ontogeny, and Phylogeny of ...
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Supplementary MaterialsSupporting Info. our knowledge of crustacean rate of metabolism. Nevertheless, an instant and highly private technique is lacking to map neurotransmitters in the crustacean central nervous program still. While matrix substances facilitate molecule ionization, the in situ MSI of low mass substances via MALDI presents tremendous challenges. Among the main difficulties originates from matrix history sign interference. Typically, matrices are sprayed onto cells section before MS evaluation. As utilized matrices are little substances frequently, neurotransmitter and metabolite indicators are suppressed by abundant matrix. Another obstacle is caused by compounds PU-H71 novel inhibtior of interest themselves. Low molecular weight molecules spanning broad dynamic range of concentrations consist of diverse functional groups that can contribute to distinct ionization efficiencies in MALDI experiments. Extensive efforts have been devoted to address these issues. For instance, ...
The purpose of |i|Crustaceana|/i|, the foremost journal in the world of crustacean research, is rapid publication of papers on crustacean research in all its aspects, including taxonomy, ecology, physiology, anatomy, genetics, palaeontology and biometry. All groups of Crustacea are included.
The purpose of |i|Crustaceana|/i|, the foremost journal in the world of crustacean research, is rapid publication of papers on crustacean research in all its aspects, including taxonomy, ecology, physiology, anatomy, genetics, palaeontology and biometry. All groups of Crustacea are included.
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The now-extinct Fuxianhuia protensa had a fancy cardiovascular system that sent blood to its limbs and organs, including its brain.
Specification of the germ line is an essential event during the embryonic development of sexually reproducing animals, as germ line cells are uniquely capable of giving rise to the next generation. Animal germ cells arise through either inheritance of a specialized, maternally supplied cytoplasm called germ plasm or though inductive signaling by somatic cells. Our understanding of germ cell determination is based largely on a small number of model organisms. To better understand the evolution of germ cell specification, we are investigating this process in the amphipod crustacean Parhyale hawaiensis. Experimental evidence from previous studies demonstrated that Parhyale germ cells are specified through inheritance of a maternally supplied cytoplasmic determinant; however, this determinant has not been identified. Here we show that the one-cell stage Parhyale embryo has a distinct cytoplasmic region that can be identified by morphology as well as the localization of germ line-associated RNAs. Removal
Scilla Maritima.). Natural order.- Liliaceae.. Common name.- Squills.. General Analysis.-. Acts upon the cerebro-spinal nervous system, establishing excessive irritation, which is manifested principally in the respiratory and urinary organs, even to the extent of inflammation.. Characteristic symptoms.. Head.- (Squilla maritima). Cloudy dizziness in the head.. Stitching pain in right side of forehead.. Contractive pain in both temples.. Sudden transient drawing pain in occiput, from left to right.. Eyes.- (Squilla maritima). Contraction of the pupils.. Ears.- (Squilla maritima). Tearing pain behind the left ear.. Nose.- (Squilla maritima). Acrid, corrosive, fluent coryza in the morning ; sneezing, and watering of the eyes. (Ars., Cepa, Euphr.). Sensation of soreness of the margins of the nostrils.. Throat.- (Squilla maritima). Burning in palate and throat.. Irritation and tickling in throat, inducing cough.. Stomach.- (Squilla maritima). Sweet or bitter taste of food.. Insatiable ...
01 3:18 £ , O North Carolina Department of Conservation and Development Division of Mineral Resources Jasper L. Stuckey, State Geologist Bulletin Number 78 Cretaceous Ostracoda From Wells In The Southeastern United States By Frederick M. Swain and Philip M. Brown University of Minnesota, Minneapolis, Minnesota U. S. Geological Survey, Raleigh, North Carolina PREPARED COOPERATIVELY BY THE GEOLOGICAL SURVEY, UNITED STATES DEPARTMENT OF THE INTERIOR 1964 North Carolina Department of Conservation and Development Division of Mineral Resources Jasper L. Stuckey, State Geologist Bulletin Number 78 Cretaceous Ostracoda From Wells In The Southeastern United States By Frederick M. Swain and Philip M. Brown University of Minnesota, Minneapolis, Minnesota U. S. Geological Survey, Raleigh, North Carolina PREPARED COOPERATIVELY BY THE GEOLOGICAL SURVEY, UNITED STATES DEPARTMENT OF THE INTERIOR 1964 MEMBERS OF THE BOARD OF CONSERVATION AND DEVELOPMENT Hargrove Bowles, Jr., Chairman Greensboro John M. Akers ...
01 3:18 £ , O North Carolina Department of Conservation and Development Division of Mineral Resources Jasper L. Stuckey, State Geologist Bulletin Number 78 Cretaceous Ostracoda From Wells In The Southeastern United States By Frederick M. Swain and Philip M. Brown University of Minnesota, Minneapolis, Minnesota U. S. Geological Survey, Raleigh, North Carolina PREPARED COOPERATIVELY BY THE GEOLOGICAL SURVEY, UNITED STATES DEPARTMENT OF THE INTERIOR 1964 North Carolina Department of Conservation and Development Division of Mineral Resources Jasper L. Stuckey, State Geologist Bulletin Number 78 Cretaceous Ostracoda From Wells In The Southeastern United States By Frederick M. Swain and Philip M. Brown University of Minnesota, Minneapolis, Minnesota U. S. Geological Survey, Raleigh, North Carolina PREPARED COOPERATIVELY BY THE GEOLOGICAL SURVEY, UNITED STATES DEPARTMENT OF THE INTERIOR 1964 MEMBERS OF THE BOARD OF CONSERVATION AND DEVELOPMENT Hargrove Bowles, Jr., Chairman Greensboro John M. Akers ...
Branchiopod crustaceans are represented by fairy, tadpole, and clam shrimps (Anostraca, Notostraca, Laevicaudata, Spinicaudata), which typically inhabit temporary freshwater bodies, and water fleas (Cladoceromorpha), which live in all kinds of freshwater and occasionally marine environments [1, 2]. The earliest branchiopods occur in the Cambrian, where they are represented by complete body fossils from Sweden such as Rehbachiella kinnekullensis [3] and isolated mandibles preserved as small carbonaceous fossils [4-6] from Canada. The earliest known continental branchiopods are associated with hot spring environments [7] represented by the Early Devonian Rhynie Chert of Scotland (410 million years ago) and include possible stem-group or crown-group Anostraca, Notostraca, and clam shrimps or Cladoceromorpha [8-10], which differmorphologically fromtheirmodern counterparts [1, 2, 11]. Here we report the discovery of an ephemeral pool branchiopod community from the 365-million-year-old Strud locality ...
Jarman, S. N., S. Nicol, N. G. Elliott, and A. McMinn. 2000. 28S rDNA evolution in the Eumalacostraca and the phylogenetic position of krill. Molecular Phylogenetics and Evolution 17:26-36.. Martin, J. W. and G. E. Davis. 2001. An updated Classification of the Recent Crustacea. Natural History Museum of Los Angeles County Science Series 39. Los Angeles, CA. Mauchline, J. 1984. Euphausiid, Stomatopod and Leptostracan Crustaceans: Keys and Notes for the Identification of the Species. Synopses of the British Fauna, New Series, no. 30. Estuarine and Brackish-water Sciences Association. Linnean Society of London. E.J Brill / Dr W. Backhuys, Leiden.. Richter, S. and G. Scholtz. 2001. Phylogenetic analysis of the Malacostraca (Crustacea). Journal of Zoological Systematics and Evolutionary Research 39:113-136.. Scholtz, G. 2000. Evolution of the nauplius stage in malacostracan crustaceans. Journal of Zoological Systematics and Evolutionary Research 38:175-187.. Schram, R. F. 1977. Paleozoogeography of ...
Coloured scanning electron micrograph (SEM) of Pillbug, crustacean, isopod (Armadillidium vulgare). Isopods are omnivores or scavengers feeding on dead or decaying plants or animals. Some may eat live plants. Isopods breathe with gills, so they are restricted to areas with high humidity, under rocks or logs, in leaf litter or in crevices. When disturbed they can roll in to balls to protect themselves (thus the nickname rollie pollie). Magnification x12 when shortest axis printed at 25 millimetres. - Stock Image C032/4199
Each compound eye is made up of up tens of thousands of ommatidia, clusters of photoreceptor cells.[14] Each eye consists of two flattened hemispheres separated by parallel rows of specialised ommatidia, collectively called the midband. The number of omatidial rows in the midband ranges from two to six.[13][14] This divides the eye into three regions. This configuration enables mantis shrimp to see objects with three parts of the same eye. In other words, each eye possesses trinocular vision and therefore depth perception. The upper and lower hemispheres are used primarily for recognition of form and motion, like the eyes of many other crustaceans.[13] Mantis shrimp can perceive wavelengths of light ranging from deep ultraviolet (UVB) to far-red (300 to 720 nm) and polarized light.[14][19] In mantis shrimp in the superfamilies Gonodactyloidea, Lysiosquilloidea, and Hemisquilloidea, the midband is made up of six omatodial rows. Rows 1 to 4 process colours, while rows 5 and 6 detect circularly or ...
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Joannea Geol. Paläont. 11: (2011) Recent ostracods from the Azores archipelago Ricardo P. MEIRELES, Antonio FRIAS MARTINS & Sérgio ÁVILA The Azores is an archipelago in the Atlantic Ocean between
Re-description of Orchestia stephenseni Cecchini, 1928: designation of neotype and senior synonym to Orchestia constricta A. Costa, 1853 (Crustacea: Amphipoda: Talitridae) by Reversal of Precedence
Vilenkin B.Ya; Plotnikova N.A.; Tsygankova L.P., 1981: Regulation of growth rate of young of balanus balanoides crustacea cirripedia in experimental conditions
Crustaceans possess a diverse array of specialized limbs. Although shifts in Hox gene expression domains have been postulated to play a role in generating this limb diversity, little functional data have been provided to understand the precise roles of Hox genes during crustacean development. We used a combination of CRISPR/Cas9-targeted mutagenesis and RNAi knockdown to decipher the function of the six Hox genes expressed in the developing mouth and trunk of the amphipod Parhyale hawaiensis. These experimentally manipulated animals display specific and striking homeotic transformations. We found that abdominal-A (abd-A) and Abdominal-B (Abd-B) are required for proper posterior patterning, with knockout of Abd-B resulting in an animal with thoracic type legs along what would have been an abdomen, and abd-A disruption generating a simplified body plan characterized by a loss of specialization in both abdominal and thoracic appendages. In the thorax, Ubx is necessary for gill development and for ...
Cronin TW, Marshall NJ, Caldwell RL. Photoreceptor spectral diversity in the retinas of squilloid and lysiosquilloid stomatopod crustaceans. Journal of Comparative Physiology A. 1993;172:339-50. ...
These are a few of the pdf files (and a few Microsoft Word documents) that Ive accumulated in my web browsing. MOST of these are hyperlinked to their source. If you want one that is not hyperlinked or if the link isnt working, e-mail me at [email protected] and Ill be happy to send it to you. Please note that this list will be updated continuously as I find more available resources. All of these files are freely available on the Internet so there should be no copyright issues. Articles with author names in RED are new additions since October 27, 2017. Phylum Arthropoda Subphylum Crustacea Class Branchiopoda - Fairy Shrimp, Clam Shrimp and Their Relatives Subclass Phyllopoda Order Lipostraca Scourfield, D.J. (1926). V. On a New Type of Crustacean from the Old Red Sandstone (Rhynie Chert Bed , Aberdeenshire) - Lepidocaris rhyniensis, gen. et sp. nov. Philosophical Transactions B, Vol.CCXIV. Order Notostraca - Tadpole Shrimp Gand, G., et al. (2008). Notostraca trackways in Permian playa ...
Myanmarorchestia victoria sp. nov. (Crustacea, Amphipoda, Talitridae), a new species of landhopper from the high altitude forests in Myanmar
The first antennae of arthropods are divisible into two main types, viz. (1) segmented antennae and (2) annulated antennae. In the first type the antenna consists of a variable number of segments, each having intrinsic musculature. The antennae of the Ohilopoda, Diplopoda, Pauropoda, Symphyla, Collembola, and Thysanura Entognatha all pertain to this type; also, the first antennae of many Copepoda and Ostracoda.. In the second type the antenna consists of a peduncle or protopodite composed of one or more segments, each with intrinsic musculature. Distally it bears an annulated flagellum, or a pair of flagella, devoid of intrinsic muscles and whose movements are effected by muscles originating within the peduncle. The first antennae of the Crustacea Malacostraca and the antennae of the Thysanura Ectognatha and of all the Insecta Pterygota belong to this type.. The greatly elongated antennae of the Schizotarsia are intermediate between these two types. They are composed of an immense number of ...
PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.
Nitrogenous wastes including ammonia-N, nitrite-N, and nitrate-N are increasingly becoming a global issue in aquatic ecosystems due to escalating anthropogenic activities and are a ubiquitous concern in aquaculture. These pollutants are interrelated via the nitrification cycle, with the direct metabolic product ammonia-N generally being the most toxic with high species specificity. Furthermore, while environmental factors influencing nitrogenous waste toxicity are similar, the causative underlying mechanisms are often substantially different. In this review, we focus on decapod crustaceans due to their high commercial value and likelihood of encountering these pollutants in their benthic or near-benthic habitat. While a large body of publications exists in this area, to date a comprehensive literature review on relative toxicities of all three nitrogenous wastes, physiological consequences, and adaptive mechanisms of crustaceans is lacking. Understanding these processes will likely have ...
This is likewise the case with the Cirripedia, and it is only the wonderful elongation of the anterior part of the head, its fixed condition, and the absence of external eyes and antennæ, which gives to the Cirripedia their peculiar character, and has hitherto prevented the homologies of these parts from having been recognised ...
The intercellular relationships in the ommatidia of the lateral eye of Limulus have been investigated. The distal process of the eccentric cell gives origin to microvilli which interdigitate with the microvilli of the retinular cells. Therefore, both types of visual cells contribute to form the rhabdom and may have an analogous photoreceptor function. Quintuple-layered junctions are found within the rhabdom at the lines of demarcation between adjoining microvilli, whether the microvilli originate from a single retinular cell, from two adjacent retinular cells, or from a retinular cell and the eccentric cell. Furthermore, quintuple-layered junctions between the eccentric cell and the tips of the microvilli of the retinular cells occur at the boundary between the distal process and the rhabdom. These findings are interpreted to indicate that the rhabdom provides an extensive electrotonic junction relating retinular cells to one another and to the eccentric cell. Quintuple-layered junctions between ...
Autor: Kreissl, S. et al.; Genre: Zeitschriftenartikel; Im Druck veröffentlicht: 2008; Open Access; Titel: Muscle precursor cells in the developing limbs of two isopods (Crustacea, Peracarida): an immunohistochemical study using a novel monoclonal antibody against myosin heavy chain
Nearly all decapod crustaceans found in Antarctic waters south of the Antarctic Convergence are caridean shrimps (Natantia) while the group of Reptantia is largely absent in this area. Progress in the
This dataset contains the digitized treatments in Plazi based on the original journal article Kilgour, Morgan J., Shirley, Thomas C. (2014): Reproductive biology of galatheoid and chirostyloid (Crustacea: Decapoda) squat lobsters from the Gulf of Mexico. Zootaxa 3754 (4): 381-419, DOI: http://dx.doi.org/10.11646/zootaxa.3754.4.3 ...
Odor signals mediate a variety of behaviors in animals across a diversity of taxa. Despite dramatic morphological differences between animals from different taxa, several important features of olfactory system organization and processing are similar across animals. Because of this similarity, a number of different organisms including mammals, insects, and decapod crustaceans serve as valuable model systems for understanding general principles of olfactory processing. As in other organisms, including both vertebrates and insects, the chemosensory system of decapod crustaceans is organized into multiple anatomically distinct neuronal pathways. The two main pathways (the aesthetasc/ olfactory lobe pathway and non-aesthetasc/ lateral antennular neuropil pathway) originate in different populations of antennular sensilla and project to different neuropils in the brain. The functional significance of this parallel organization is not well understood in crustaceans or in many other species. Although in some
Easily hatched and reared in the classroom, these marine crustaceans are readily available food for Hydra and fish as well as excellent material to study crustacean anatomy and …
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Arnett, R. H. 2000. American Insects: A Handbook of the Insects of America North of Mexico. CRC Press, Boca Raton, Fla.. Beutel, R. G. and S. N. Gorb. 2001. Ultrastructure of attachment specializations of hexapods, (Arthropoda): evolutionary patterns inferred from a revised ordinal phylogeny. Journal of Zoological Systematics and Evolutionary Research 39:177-207.. Bilinski, S. M. 1993. Structure of ovaries and oogenesis in entognathans (Apterygota). International Journal of Insect Morphology & Embryology 22:255-269.. Bitsch, C. and J. Bitsch. 1998. Internal anatomy and phylogenetic relationships among apterygote insect clades (Hexapoda). Annales de la Soci t Entomologique de France 34:339-363.. Bitsch, C. and J. Bitsch. 2000. The phylogenetic interrelationships of the higher taxa of apterygote hexapods. Zoologica Scripta 29:131-156.. Bitsch, C. and J. Bitsch. 2004. Phylogenetic relationships of basal hexapods among the mandibulate arthropods: a cladistics analysis based on comparative ...
A theory of movement perception has been proposed to explain the optomotor responses of the housefly (Musca domestica), and this has been tested by McCann & Maginitie (1965). The present study was made in order to ascertain if the anatomical and physiological properties of the compound eye are commensurate with those postulated by the model. The three properties studied were the inter-ommatidial angle, the receptive field of the retinula cells, and the relationship between light intensity and the magnitude of the generator potential. The angle between the axes of adjacent ommatidia was measured anatomically. This varies with the position in the eye but has a mean value of 3.9° in the horizontal plane and 2.4° in the vertical. During dark adaptation the secondary pigment cells contract by about 5 pm at either end, moving the pigment back away from the lenses and also exposing the focal region of the ommatidium. The receptive field of single retinula cells was measured electrophysiologically. ...
Looking for Cirrhipoda? Find out information about Cirrhipoda. common name of the sedentary crustacean crustacean , primarily aquatic arthropod of the subphylum Crustacea. Most of the 44,000 crustacean species are... Explanation of Cirrhipoda
Domain: Eukaryota • Regnum: Animalia • Subregnum: Eumetazoa • Cladus: Bilateria • Superphylum: Protostomia • Cladus: Ecdysozoa • Phylum: Arthropoda • Subphylum: Crustacea • Classis: Malacostraca • Ordo: Decapoda • Subordo: Pleocyemata • Infraordo: Astacidea • Familia: Nephropidae • Subfamilia: Nephropinae • Genus: Homarus Weber, 1795 ...
The fossilized remains of a tiny 100 million-year-old crustacean reveal evidence of what to her at least would have been giant sperm, measuring perhaps as long as her body. While the sperm itself was not preserved, 3-D images of the females specialized receptacles indicate she had just finished having sex and that they were filled with sperm that has since degraded. (The oldest direct evidence of sperm comes from a springtail living some 40 million years ago, according to the researchers.) Called Harbinia micropapillosa, the tiny organism now found to bear evidence of degraded sperm was also an ostracod, crustaceans ranging in size from smaller than a poppy seed to as large as a meatball. The organisms are still around on Earth today and are equipped with up to eight pairs of appendages along their bivalve bodies. They are known for their supersized sperm relative to their body size, reaching a record-breaking 10 body lengths, or 0.2 inches (6 millimeters), in Propontocypris monstrosa. The ...
As I took those first tentative steps through the marsh, one of the first things I noticed scuttling across the moist ground were what looked to me like giant wood lice. Terrestrial isopods (class Malacostraca, order Isopoda) are nothing new to me-"roly-polys" and wood lice are common where I live, but I have never seen any as large as these, measuring as much as 25-30 mm in length (thats an inch or more, folks!), not even counting their quite long antennae and uropoda. They were also quite numerous, abundant actually. I must confess to feeling a little creeped out at first upon seeing them-I could just imagine these strange, alien creatures suddenly swarming all over me and devouring the flesh from my body under the cover of darkness. Okay, it was more of a fleeting thought than a palpable fear, but it has been awhile since Ive encountered an arthropod with which I am so completely unfamiliar. During the course of the night I photographed a number of individuals, not knowing what characters ...
To place the real crabs and their relatives in taxonomic perspective lets do a/the usual rundown on their systematics starting from the:. Subphylum Crustacea: About 42,000 species of some of the most familiar arthropods; crabs, shrimps, lobsters, crayfish, wood-lice (sow-bugs, rolly-pollies, you know, terrestrial isopods, and aquatic, even parasitic marine ones). Many small members in fresh and marine habitats of importance in aquatic food chains. Primarily aquatic, mostly marine.. Some common characteristics of the crustaceans: 1) Their heads are more or less uniform with five pair of appendages: they have two pair of antennae (this feature is distinctive within the phylum); the third pair as opposing, biting, grinding mandibles. Behind the mandibles there are two pair of accessory feeding appendages, the first and second maxillae. 2) Their bodies trunks are composed of distinct segments covered by a chitinous exoskeleton strengthened by deposition of calcium salts. 3) Crustacean appendages ...
The head bears two pairs of antennae, the first of which is often biramous (branching into two parts) and the second pair bear exopods (outer branches) which are often flattened into antennal scales known as scaphocerites.[7] The mouthparts consist of pairs each of mandibles, maxillules (second pair of mouthparts) and maxillae. Usually a pair of stalked compound eyes is present, although in some taxa the eyes are unstalked, reduced or lost.[9][10]. Up to three thoracic segments may be fused with the head to form a cephalothorax; the associated appendages turn forward and are modified as maxillipeds (accessory mouthparts).[7] A carapace may be absent, present or secondarily lost, and may cover the head, part or all of the thorax and some of the abdomen.[6] It is variable in form and may be fused dorsally with some of the thoracic segments or occasionally be in two parts, hinged dorsally.[9] Typically, each of the thoracic appendages is biramous and the endopods are the better developed of the ...
Domain: Eukaryota • Regnum: Animalia • Subregnum: Eumetazoa • Cladus: Bilateria • Superphylum: Protostomia • Cladus: Ecdysozoa • Phylum: Arthropoda • Subphylum: Crustacea • Classis: Malacostraca • Subclassis: Eumalacostraca • Superordo: Eucarida • Ordo: Decapoda • Subordo: Dendrobranchiata • Superfamilia: Penaeoidea • Familia: Aristeidae • Genus: Aristeus Duvernoy, 1840 ...
EXPERIMENTE AN LEBEWESEN, TIERVERSUCHE (BIOLOGISCHE TECHNIKEN); BRANCHIOPODA (ZOOLOGIE); EXPERIMENTS ON LIVING ORGANISMS, ANIMAL EXPERIMENTS (BIOLOGICAL TECHNIQUES); BRANCHIOPODA (ZOOLOGY ...
The present study addresses the development of the nervous system in three malacostracans species: the euphausiacean Meganyctiphanes norvegica, and the two decapods Penaeus monodon (Dendrobranchiata) and Procambarus fallax f. virginalis (Astacida). Based on the use of antibody stainings and fluorescent dyes in combination with CLSM and 3D reconstruction, the observations cover the onset of axogenesis and follow the establishment of the axonal scaffold in a consistent and comprehensive sequence through the embryonic and the post-embryonic development. The development of the nervous system reveals a general developmental pattern shared by the three investigated species. With a comparative approach, the observed pattern is discussed with respect to the segmental organization of the animals body. In particular, the development of the peripheral and of the enteric nervous systems plays a crucial role in the process of guiding the main axonal scaffold. In this context, the medulla terminalis, which ...
For the most accurate results, please enter a full postcode into the search box so we can determine your exact location. If you type in a town name or the first part of a postcode the results will be ordered by distance from the centre of that town.. ...
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This lesson requires a Biopac Student Lab (BSL) System and the following hardware. If your BSL System does not include all hardware items, expand your system by selecting required items below. For more details, review the Lesson: L# BSL Lessons - see the Lab Manual or launch BSL; A# and H# BSL PRO Lessons, click the PDF link above to review full setup, recording, and analysis procedures.. ...
A. S. Rivera, M Pankey, S., Plachetzki, D. C., Villacorta, C., Syme, A. E., Serb, J. M., Omilian, A. R., and Oakley, T. H., "Gene duplication and the origins of morphological complexity in pancrustacean eyes, a genomic approach", BMC evolutionary biology, vol. 10, no. 1, p. 123, 2010. ...
Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesnt cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control. ...
A gender-bending parasite has been discovered which is believed to be responsible for turning male shrimps and other crustaceans into females.
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Background Most of crustacean immune responses are well described for the aquatic forms whereas almost nothing is known for the isopods that evolved a terrestrial lifestyle. The latter are also infected at a high prevalence with Wolbachia, an endosymbiotic bacterium which affects the host immune system, possibly to improve its transmission. In contrast with insect models, the isopod Armadillidium vulgare is known to harbor Wolbachia inside the haemocytes. Methodology/Principal Findings In A. vulgare we characterized three haemocyte types (TEM, flow cytometry): the hyaline and semi-granular haemocytes were phagocytes, while semi-granular and granular haemocytes performed encapsulation. They were produced in the haematopoietic organs, from central stem cells, maturing as they moved toward the edge (TEM). In infected individuals, live Wolbachia (FISH) colonized 38% of the haemocytes but with low, variable densities (6.45±0.46 Wolbachia on average). So far they were not found in hyaline haemocytes (TEM).
A non-ovigerous female mitten crab captured in Iraq on the 20th June 2005 was initially identified as Eriocheir sinensis H. Milne Edwards, 1853. More material has now been made available from Iraq and Kuwait and these specimens were compared with the extant type series of E. sinensis and E. hepuensis Dai, 1991. From this morphological study the Persian Gulf material was identified as the Hepu mitten crab, E. hepuensis. This is the first report of this mitten crab species outside its native range of southern China. However, because mitten crab taxonomy and systematics requires further clarification especially with respect to species of Eriocheir De Haan, 1835, the DNA of the Persian Gulf material was compared with a suite of GenBank COI sequences from various mitten crab taxa. The results of this extensive examination indicate that the Iraqi and Kuwaiti specimens are E. hepuensis and the DNA analysis indicates that mitten crabs can be assigned to three genera and six species; although the present ...
Blanco-Bercial, L., Cornils, A., Copley, N., Bucklin, A. 2014. DNA barcoding of marine copepods: assessment of analytical approaches to species identification. PLOS Currents Tree of Life. 2014 Jun 23. Edition 1 (doi:10.1371/currents.tol.cdf8b74881f87e3b01d56b43791626d2). More than 2,500 species of copepods (Class Maxillopoda; Subclass Copepoda) occur in the marine planktonic environment. The exceptional morphological conservation of the group, with numerous sibling species groups, makes the identification of species challenging, even for expert taxonomists. Molecular approaches to species identification have allowed rapid detection, discrimination, and identification of species based on DNA sequencing of single specimens and environmental samples. Despite the recent development of diverse genetic and genomic markers, the barcode region of the mitochondrial cytochrome c oxidase subunit I (COI) gene remains a useful and - in some cases - unequaled diagnostic character for species-level ...
The salmon louse (Lepeophtheirus salmonis) is an ectoparasitic copepod feeding on skin, mucous and blood from salmonid hosts. Recently it was shown that L. salmonis infections in farmed fish induce epizootics in wild fish [1,2]. The life cycle of L.salmonis consists of 8 developmental stages separated by ecdysis [3,4] and after the final molt, females develop into mature adults that continuously produce eggs for life. The first free-living larvae (naupli I) hatch directly from egg-strings attached to adult females and all three larval stages (naupli I, naupli II and the infectious copepidid stage) can be transported by the ocean currents over large distances depending on hydrographical conditions [5]. After host settlement the infectious copepodids stage molt into chalimus. The two chalimus stages, all separated by molting, are anchored to the host by a frontal filament [6], which restricts the feeding area. However, in the succeeding pre-ad I and -II and adult stages the salmon louse can move ...
Avermectin B1a, a macrocyclic lactone with broad spectrum anthelmintic activity, affects neuromuscular transmission in the lobster stretcher muscle. Perfusion of the muscle with 1-10 microgram of the drug per ml eliminates inhibitory postsynaptic potentials within a few minutes. Intracellularly recorded excitatory postsynaptic potentials are gradually reduced in amplitude over 20-30 min, and their falling phases become faster; there is no effect, however, on extracellularly recorded excitatory potentials. Avermectin B1a reduced the input resistance of the muscle fibers with a time course similar to that of the reduction of excitatory potentials. Washing for up to 2 hr with drug-free solution fails to reverse the drugs effects. However, perfusion with 20 microgram of picrotoxin per ml results in recovery of the excitatory potentials and input resistance. Avermectin B1a also blocks the firing of the crayfish stretch receptor neuron, and this block is also reversed by picrotoxin. We hypothesize ...
Franciscana dolphins (Pontoporia blainvillei) have a range that hugs the Atlantic coast of Brazil, Uruguay, and Argentina. This species is one of the worlds smallest cetaceans and is a member of the river dolphin family, although it actually lives in coastal waters and estuaries. Females probably begin to have calves between two and five years and probably stay with each calf for some time. Because researchers estimate that between two and five percent of the Fransiscana population near Argentina becomes entangled in fishing nets from small-scale operations each year, the by-catch death rate has a significant impact on the population numbers. By-catch is the biggest impact to small cetacean populations world-wide.. "The by-catch in lost Franciscana dolphins is comparable to what the population produces in terms of offspring," says Pablo Bordino of Fundación Aquamarina in Buenos Aires, Argentina. "To know that Franciscana family groups are being caught in certain areas allows us to focus our ...
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Young, P., Kibenge, F. S. B., & Burka, J. F. (2007). Binding characteristics of emamectin benzoate to GABA-and glutamate-gated chloride channels of sea lice (Lepeophtheirus salmonis) ...

Evolutionary morphology of the hemolymph vascular system in hermit and king crabs (Crustacea: Decapoda: Anomala) - Keiler -...Evolutionary morphology of the hemolymph vascular system in hermit and king crabs (Crustacea: Decapoda: Anomala) - Keiler -...

Martin EJ Stegner, Torben Stemme, Thomas M Iliffe, Stefan Richter, Christian S Wirkner, The brain in three crustaceans from ... Evolutionary morphology of the hemolymph vascular system in hermit and king crabs (Crustacea: Decapoda: Anomala). Authors. *. ... Katja Jaszkowiak, Jonas Keiler, Christian S. Wirkner, Stefan Richter, The mouth apparatus ofLithodes maja(Crustacea: Decapoda ... The morphological transformation of hermit crabs into crab-like king crabs in the evolution of decapod crustaceans represents a ...
more infohttp://onlinelibrary.wiley.com/doi/10.1002/jmor.20133/abstract

Brain architecture of the largest living land arthropod, the Giant Robber Crab Birgus latro (Crustacea, Anomura, Coenobitidae):...Brain architecture of the largest living land arthropod, the Giant Robber Crab Birgus latro (Crustacea, Anomura, Coenobitidae):...

The neural and behavioral basis of chemical communication in terrestrial crustaceans. Chemical Communication in Crustaceans. ... In the crustacean first optic neuropil (the lamina), synapsin labeling is weak compared to the other brain neuropils [40, 103 ... For Crustacea, the antiserum was shown to label neurons in the central complex of the crayfish Cherax destructor[53]. However, ... Crustacean-SIFamide is a 1,381-Da peptide that has been identified in the crayfish P. clarkii by topological mass spectrometry ...
more infohttps://0-frontiersinzoology-biomedcentral-com.brum.beds.ac.uk/articles/10.1186/1742-9994-7-25

Zebra Reef Hermit Crab - Calcinus seuratiZebra Reef Hermit Crab - Calcinus seurati

As with other crustaceans, hermit crabs must molt to grow. When they molt, they crawl out of their shell homes and shed their ... Crustaceans benefit from iodine and mineral supplements to help form a healthy, hard exoskeleton. Regular water changes with ... the minerals also get depleted and nitrates accumulate and can also be detrimental to crustaceans and other invertebrates. ...
more infohttps://www.thatpetplace.com/Calcinus-seurati-zebra-reef-hermit-crab-208403

Hermit Crabs - Facts, Information & PicturesHermit Crabs - Facts, Information & Pictures

Hermit crabs are decapod crustaceans of the superfamily Paguroidea, not closely related to true crabs. ...
more infohttps://animalcorner.co.uk/animals/hermit-crabs/

Phylum ArthropodaPhylum Arthropoda

Posted in Invertebrate, Phylum Arthropoda, Species , Tagged crustacea, ling cod, sea lice Telmessus cheiragonus-The Race Rocks ... Class: Crustacea. Order: Decapoda. Superfamily: Paguridea. Family: Paguridea. Genus: Pagurus. Species: hirsuitiusculus. Pagurus ... Class: Crustacea. Order: Decapoda. Superfamily: Paguridea. Family: Paguridea. Genus: Pagurus. Species: beringanus. Common Name ... Class Crustacea. Order Decapoda. Family Grapsidae. Genus Hemigrapsus. Species oregonensis. Common Name: shore crab ...
more infohttp://www.racerocks.ca/category/species/phylum-arthropoda/

Steam | FishChoiceSteam | FishChoice

Snow crabs, like all crustaceans, can only grow by molting, because their hard shells (exoskeletons) prevent a gradual increase ...
more infohttp://www.fishchoice.com/cooking-method/steam

Profile: Judith S. Weis | Rutgers-Newark Colleges of Arts & SciencesProfile: Judith S. Weis | Rutgers-Newark Colleges of Arts & Sciences

The role of behavior in the success of invasive crustaceans. Mar. Freshwat. Behav. Physiol. 43: 83-98. ...
more infohttps://www.ncas.rutgers.edu/judith-s-weis

Gastropod predation sites: the role of predator and prey in chemical attraction of the hermit crab Clibanarius vittatus |...Gastropod predation sites: the role of predator and prey in chemical attraction of the hermit crab Clibanarius vittatus |...

Journal of Crustacean Biology, 9, 517-524.. Forward, R.B. Jr, Rittschof, D. & Devries, M., 1987. Peptide pheromones synchronize ... Journal of Crustacean Biology, 2, 588-592.. Wilber, T.P. Jr, & Herrnkind, W.F., 1984. Predaceous gastropods regulate new-shell ... Journal of Crustacean Biology, 4, 645-654.. Graham, A., 1941. The oesophagus of the stenoglossan prosobranchs. Proceedings of ... Crustacean peptide and peptide-like pheromones and kairomones. Peptides, Vol. 25, Issue. 9, p. 1503. ...
more infohttp://core-cms.prod.aop.cambridge.org/core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom/article/gastropod-predation-sites-the-role-of-predator-and-prey-in-chemical-attraction-of-the-hermit-crab-clibanarius-vittatus/C2CF37562B182B0DEDE6245F21112A22

Snow Crab Love: February 2012Snow Crab Love: February 2012

Chitin is considered to be the second most abundant biomass on Earth! Thats because it is found in crustacean and insect ... crustaceans grow each time they molt and lobsters have continuous molting (unlike snow crabs), so as long as theyre alive, ...
more infohttp://snowcrablove.blogspot.com/2012_02_01_archive.html

CrustaceaCrustacea

The Crustacean Society *Crustacea at the Natural History Museum of Los Angeles County. *Marine Crustaceans of Southern ... crustacea.net. An information retrieval system for crustaceans of the world. Australian Museum online. * ... The Tetraconata concept: hexapod-crustacean relationships and the phylogeny of Crustacea. Organisms Diversity & Evolution 2:217 ... Crustacea Crabs, lobsters, shrimp, barnacles, sow bugs, etc.. Click on an image to view larger version & data in a new window ...
more infohttp://www.tolweb.org/Crustacea/

CrustaceaCrustacea

The Crustacean Society *Crustacea at the Natural History Museum of Los Angeles County. *Marine Crustaceans of Southern ... crustacea.net. An information retrieval system for crustaceans of the world. Australian Museum online. * ... The Tetraconata concept: hexapod-crustacean relationships and the phylogeny of Crustacea. Organisms Diversity & Evolution 2:217 ... Crustacea Crabs, lobsters, shrimp, barnacles, sow bugs, etc.. Click on an image to view larger version & data in a new window ...
more infohttp://www.tolweb.org/Crustacea/2529

CrustaceaCrustacea

The Crustacean Society *Crustacea at the Natural History Museum of Los Angeles County. *Marine Crustaceans of Southern ... crustacea.net. An information retrieval system for crustaceans of the world. Australian Museum online. * ... The Tetraconata concept: hexapod-crustacean relationships and the phylogeny of Crustacea. Organisms Diversity & Evolution 2:217 ... Crustacea Crabs, lobsters, shrimp, barnacles, sow bugs, etc.. Click on an image to view larger version & data in a new window ...
more infohttp://tolweb.org/Crustacea/2529

CrustaceanCrustacean

Crustaceans (Crustacea) form a very large group of arthropods, usually treated as a subphylum, which includes such familiar ... Most crustaceans are free-living aquatic animals, but some are terrestrial (e.g. woodlice), some are parasitic (e.g. fish lice ... More than 10 million tons of crustaceans are produced by fishery or farming for human consumption, the majority of it being ... The scientific study of crustaceans is known as carcinology (alternatively, malacostracology, crustaceology or crustalogy), and ...
more infohttp://www.princeton.edu/~achaney/tmve/wiki100k/docs/Crustacean.html

Crustacean larva - WikipediaCrustacean larva - Wikipedia

Larvae of crustacean groups[edit]. Branchiopoda[edit]. In the Branchiopoda, the most basal group of crustaceans, there is no ... "World Crustacea. Australian Museum. Retrieved June 6, 2010.. *^ Joachim T. Haug; Carolin Haug; Manfred Ehrlich (2008). "First ... Young isopod crustaceans hatch directly into a manca stage, which is similar in appearance to the adult. The lack of a free- ... History of the study of crustacean larva[edit]. Antonie van Leeuwenhoek was the first person to observe the difference between ...
more infohttps://en.wikipedia.org/wiki/Nauplius_

Crustacea (Crustaceans)Crustacea (Crustaceans)

The Crustacea is a subphylum of arthropods defined by the nauplius larva, two pairs of antennae and biramous (two branched) ... As traditionally viewed, crustaceans are thus very likely paraphyletic. Key Concepts:. * Crustaceans share several derived ... Crustacea (Crustaceans). Neil W Blackstone, Northern Illinois University, DeKalb, Illinois, USA Published online: October 2012 ... Crustacean phylogeny has recently been roiled by the pancrustacean hypothesis: insects and crustaceans form one large clade. ...
more infohttp://www.els.net/WileyCDA/ElsArticle/refId-a0001606.html

Crustaceans FAQCrustaceans FAQ

In this country, the term "shrimp" applies to all crustaceans of the Natantia group, regardless of size. "Crayfish" or " ... Chitin is the structural material that forms the shells of crustaceans, such as crab, lobster, and shrimp. ... "crawfish" are names given to both a common freshwater crustacean and to the saltwater spiny lobster. ...
more infohttps://www.infoplease.com/science-health/nature/how-does-consumer-know-shellfish-are-safe-eat

The Crustacea (Subphylum Crustacea)The Crustacea (Subphylum Crustacea)

Further to this nine species of Crustacean are known to have gone extinct since the 1800s. Crustaceans Which Have Become ... The Crustacea. Crabs, Prawns, Shrimps and Lobsters, but also Woodlice and Barnacles are but a few of the wonderfully diverse ... A Few Examples of Critically Endangered Crustaceans. Gammarus desperatus. Noels Amphipod. Dexteria floridana. Florida Fairy ... The smallest Crustaceans in the world are the Water Fleas of the genus Alonella which can be adult at a mere 0.25 mm or about ...
more infohttps://www.earthlife.net/inverts/crustacea.html

Category:Crustacean stubs - WikipediaCategory:Crustacean stubs - Wikipedia

Pages in category "Crustacean stubs". The following 146 pages are in this category, out of 146 total. This list may not reflect ... This category is for stub articles relating to crustaceans. You can help by expanding them.. To add an article to this category ... Retrieved from "https://en.wikipedia.org/w/index.php?title=Category:Crustacean_stubs&oldid=830355035" ...
more infohttps://en.wikipedia.org/wiki/Category:Crustacean_stubs

Neurosecretory systems in decapod Crustacea | SpringerLinkNeurosecretory systems in decapod Crustacea | SpringerLink

... been numbered so that these maps may guide cytological and physiological study on these species and on other decapod Crustacea. ...
more infohttps://link.springer.com/article/10.1007%2FBF00334801

Crustacea. Part 3Crustacea. Part 3

... Fig. 137. - Morphology of Lobster. 1. Lobster, with all the appendages, except the terminal swimmerets, ... In the higher Crustaceans, the course of the circulation is as follows (fig. 138): The heart is a muscular sac, situated ... As regards the digestive system of the Crustacea, the alimentary canal is, with few exceptions, continued straight from the ...
more infohttp://chestofbooks.com/animals/Manual-Of-Zoology/Crustacea-Part-3.html

Collection Crustacea SMFCollection Crustacea SMF

... Dataset homepage. Citation. Senckenberg. Collection Crustacea SMF. Occurrence Dataset https://doi.org/ ...
more infohttps://www.gbif.org/dataset/9668b676-f762-11e1-a439-00145eb45e9a

Laevicaudata | crustacean | BritannicaLaevicaudata | crustacean | Britannica

crustacean. Learn about this topic in these articles:. taxonomy. * In branchiopod: Annotated classification. Suborder ...
more infohttps://www.britannica.com/animal/Laevicaudata

Arctostaphylos crustacea subsp. crustaceaArctostaphylos crustacea subsp. crustacea

... © 2007 Neal Kramer. Arctostaphylos crustacea subsp. crustacea. © 2017 Steve Matson. ... Arctostaphylos crustacea subsp. crustacea. © 2017 Steve Matson. Arctostaphylos crustacea subsp. crustacea. © 2007 Neal Kramer. ... Arctostaphylos crustacea subsp. crustacea. © 2007 Neal Kramer. More photos of Arctostaphylos crustacea subsp. crustacea in ... Previous taxon: Arctostaphylos crustacea subsp. crinita. Next taxon: Arctostaphylos crustacea subsp. eastwoodiana. Name Search ...
more infohttp://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=89190

Arctostaphylos crustacea subsp. crinitaArctostaphylos crustacea subsp. crinita

Next taxon: Arctostaphylos crustacea subsp. crustacea. Name Search Botanical illustration including Arctostaphylos crustacea ... Arctostaphylos crustacea subsp. crinita. © 2004 Robert E. Preston, Ph.D.. Arctostaphylos crustacea subsp. crinita. © 2011 Neal ... Arctostaphylos crustacea subsp. crinita. © 2004 Robert E. Preston, Ph.D.. Arctostaphylos crustacea subsp. crinita. © 2011 Neal ... Species: Arctostaphylos crustacea. View Description. Habit: Erect, 1--3 m; burl prominent. Stem: twig glabrous or tomentose, ...
more infohttp://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=91855
  • The hemiellipsoid body neuropil is organized into parallel neuropil lamellae, a design that is quite unusual for decapod crustaceans. (beds.ac.uk)
  • Future studies on terrestrial members of other crustacean taxa such as Isopoda, Amphipoda, Astacida, and Brachyura will shed light on how frequently the establishment of an aerial sense of olfaction evolved in Crustacea during the transition from sea to land. (beds.ac.uk)
  • Brain architecture of the largest living land arthropod, the Giant Robber Crab Birgus latro (Crustacea, Anomura, Coenobitidae): evidence for a prominent central olfactory pathway? (beds.ac.uk)
  • The architecture of the optic neuropils and areas associated with antenna two suggest that B. latro has visual and mechanosensory skills that are comparable to those of marine Crustacea. (beds.ac.uk)
  • Several lineages within the Crustacea conquered land independently during evolution, thereby requiring physiological adaptations for a semi-terrestrial or even a fully terrestrial lifestyle. (beds.ac.uk)
  • B. latro has served as a model in numerous studies of physiological aspects related to the conquest of land by crustaceans. (beds.ac.uk)
  • This is simply be due to anthropocentric bias - furry cuddly mammals are more like us than lobsters are - and hence there is more work done on, are more papers written about, mammals than there are about crusty crustaceans. (palaeos.com)
  • Most crustaceans are free-living aquatic animals , but some are terrestrial (e.g. woodlice ), some are parasitic (e.g. fish lice , tongue worms ) and some are sessile (e.g. barnacles ). (princeton.edu)
  • The majority of crustaceans are also motile, moving about independently, although a few taxonomic units are parasitic and live attached to their hosts (including sea lice, fish lice, whale lice, tongue worms, and Cymothoa exigua, all of which may be referred to as "crustacean lice"), and adult barnacles live a sessile life - they are attached headfirst to the substrate and cannot move independently. (wikipedia.org)
  • More than 10 million tons of crustaceans are produced by fishery or farming for human consumption, the majority of it being shrimps and prawns . (princeton.edu)
  • Mantis Shrimps are members of the family Stomatopoda, they are shrimps that prey on other Crustaceans by spearing or smashing them. (earthlife.net)
  • A Massachusetts fisherman recently caught a blue lobster, which had us wondering how rare this crustacean really is. (howstuffworks.com)
  • The Cephalocarida, first discovered near New York (1955), are reminiscent of the primitive crustacean condition: many segments and trunk limbs are very similar, one after another (serial homology). (thecanadianencyclopedia.com)
  • 2001. The origin of crustaceans: new evidence from the Early Cambrian of China. (tolweb.org)
  • 2001. An updated Classification of the Recent Crustacea. (tolweb.org)
  • Martin JW and Davis GE (2001) An Updated Classification of the Recent Crustacea. (els.net)
  • The crustacean fossil record extends back to the Burgess Shale. (els.net)
  • The Crustacea are an ancient group of organisms with a fossil record stretching back to the early Cambrian 600 million years ago. (earthlife.net)
  • In some cases, the zoea stage is followed by the mysis stage, and in others, by the megalopa stage, depending on the crustacean group involved. (wikipedia.org)
  • The scientific study of crustaceans is known as carcinology (alternatively, malacostracology, crustaceology or crustalogy), and a scientist who works in carcinology is a carcinologist . (princeton.edu)
  • The body of a crustacean is composed of segments, which are grouped into three regions: the cephalon or head, the thorax, and the pleon or abdomen. (wikipedia.org)