concentrations of trace metals in tissues of chionoecetes crabs (chionoecetes japonicus and chionoecetes opilio) caught from the east/japan sea waters and potential risk assessment.the concentrations of trace metals (as, cd, co, cu, fe, hg, pb, and zn) were measured in muscle and hepatopancreas of two chionoecetes crabs (chionoecetes japonicus and c. opilio) caught from the east/japan sea (ejs) in order to assess the potential health risk by the consumption of deep sea crabs. the highest metal concentrations in muscle and hepatopancreas were as and fe, respectively, while the lowest metal concentration in two tissues was pb. the mean concentrations of cd, co, cu, fe, and p ...201728303537
crustacean hyperglycemic hormones of two cold water crab species, chionoecetes opilio and c. japonicus: isolation of cdna sequences and localization of chh neuropeptide in eyestalk ganglia.crustacean hyperglycemic hormone (chh) is primarily known for its prototypical function in hyperglycemia which is induced by the release of chh. the chh release takes place as an adaptive response to the energy demands of the animals experiencing stressful environmental, physiological or behavioral conditions. although >63 decapod chh nucleotide sequences are known (genbank), the majority of them is garnered from the species inhabiting shallow and warm water. in order to understand the adaptive ...201525224573
molecular phylogeny of a red-snow-crab species complex using mitochondrial and nuclear dna markers.nucleotide sequence variation of mitochondrial dna coi and nuclear rrna gene regions was used to reconstruct phylogenetic relationships for the red-snow-crab species complex, including the red snow crab, chionoecetes japonicus, its nominal subspecies, c. japonicus pacificus, and the triangle tanner crab, c. angulatus. the topologies of the bayesian and neighbor-joining (nj) trees of the coi and of nj trees of rrna sequences placed c. japonicus and c. angulatus in a single clade. the net sequence ...201121466347
concentrations of 137cs, 90sr, 108m ag, 239+240 pu and atom ratio of 240pu/239pu in tanner crabs, chionoecetes japonicus and chionoecetes opilio collected around japan.the anthropogenic radionuclides, (137)cs, (90)sr, (108m)ag, (239+240)pu, were measured in two chionoecetes species, red queen crab (chionoecetes japonicus) and snow crab (chionoecetes opilio) collected around japan during 1996-2007. there was no increase in the concentrations of these radionuclides and no large variation of the atom ratio of (240)pu/(239)pu during this research period. these results indicated that the source of the radionuclides was not the radioactive wastes dumped by the forme ...201020950831
isolation and characterization of polymorphic microsatellite markers in the red snow crab (chionoecetes japonicus).a total of 12 polymorphic microsatellite dna loci were isolated from the red snow crab, chionoecetes japonicus (brachyura: majidae), one of important fisheries resources in the far east. the number of alleles observed at each locus ranged from two to 19, with the observed and expected heterozygosities of 0.125-0.875 and 0.156-0.949, respectively, suggesting these loci to be a useful molecular marker for population analysis in this species. of the 12 loci, seven also were available for genotyping ...200821585846
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