Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| the glycogen phosphorylase system from the muscle of the blue crab: callinectes danae. | 1969 | 4977724 | |
| purification and properties of glycogen phosphorylase a from the muscle of the blue crab, callinectes danae. | 1974 | 4213332 | |
| kinetics of glycogen phosphorylase a from the muscle of the blue crab, callinectes danae. | 1974 | 4414042 | |
| reproductive ecology of the blue crab, callinectes danae smith, 1869 in the conceição lagoon system, santa catarina isle, brazil. | abundance of ovigerous females, size of the first gonadal maturation and the possible migration, route of the blue crab callinectes danae from the conceição lagoon system, santa catarina isle, brazil, are described. this lagoon is connected with the coastal area through a canal. a total of 1,124 crabs was caught during a 19 month sampling period. the reproduction and recruitment of juveniles occurred all year-round, with two peaks of abundance (february and september), correlated with the presen ... | 2000 | 10838920 |
| modulation by ammonium ions of gill microsomal (na+,k+)-atpase in the swimming crab callinectes danae: a possible mechanism for regulation of ammonia excretion. | the modulation by na(+), k(+), nh(4)(+) and atp of the (na(+),k(+))-atpase in a microsomal fraction from callinectes danae gills was analyzed. atp was hydrolyzed at high-affinity binding sites at a maximal rate of v=35.4+/-2.1 umg(-1) and k(0.5)=54.0+/-3.6 nm, obeying cooperative kinetics (n(h)=3.6). at low-affinity sites, the enzyme hydrolyzed atp obeying michaelis-menten kinetics with k(m)=55.0+/-3.0 microm and v=271.5+/-17.2 umg(-1). this is the first demonstration of a crustacean (na(+),k(+) ... | 2002 | 12223203 |
| gill (na+,k+)-atpase from the blue crab callinectes danae: modulation of k+-phosphatase activity by potassium and ammonium ions. | the kinetic properties of a microsomal gill (na(+),k(+))-atpase from the blue crab callinectes danae were analyzed using the substrate p-nitrophenylphosphate. the (na(+),k(+))-atpase hydrolyzed pnpp obeying cooperative kinetics (n=1.5) at a rate of v=125.4+/-7.5 u mg(-1) with k(0.5)=1.2+/-0.1 mmol l(-1); stimulation by potassium (v=121.0+/-6.1 u mg(-1); k(0.5)=2.1+/-0.1 mmol l(-1)) and magnesium ions (v=125.3+/-6.3 u mg(-1); k(0.5)=1.0+/-0.1 mmol l(-1)) was cooperative. ammonium ions also stimul ... | 2003 | 12670789 |
| bacteriology of unshelled frozen blue swimming crab (portunus pelagicus). | in this study, 45 (10 whole specimens and 35 frozen claws) frozen samples of portunus pelagicus imported into sicily (italy) from the west coast of africa were examined to assess their bacteriological characteristics and suitability for consumption. bacteriological examination was performed on two subsamples for each whole crab. the first was the body and claw muscle; the second was a pool of viscera and gills. in the case of frozen claws, each muscle claw was a sample. an aerobic plate count at ... | 2004 | 15083736 |
| k+-phosphatase activity of gill (na+, k+)-atpase from the blue crab, callinectes danae: low-salinity acclimation and expression of the alpha-subunit. | the kinetic properties of a microsomal gill (na(+), k(+)) atpase from the blue crab, callinectes danae, acclimated to 15 per thousand salinity for 10 days, were analyzed using the substrate p-nitrophenylphosphate. the (na(+), k(+))-atpase hydrolyzed the substrate obeying michaelian kinetics at a rate of v=102.9+/-4.3 u.mg(-1) with k(0.5)=1.7+/-0.1 mmol.l(-1), while stimulation by magnesium (v=93.7+/-2.3 u.mg(-1); k(0.5)=1.40+/-0.03 mmol.l(-1)) and potassium ions (v=94.9+/-3.5 u.mg(-1); k(0.5)=2. ... | 2005 | 15776418 |
| gill microsomal (na+,k+)-atpase from the blue crab callinectes danae: interactions at cationic sites. | euryhaline crustaceans tolerate exposure to a wide range of dilute media, using compensatory, ion regulatory mechanisms. however, data on molecular interactions occurring at cationic sites on the crustacean gill (na+,k+)-atpase, a key enzyme in this hyperosmoregulatory process, are unavailable. we report that na+ binding at the activating site leads to cooperative, heterotropic interactions that are insensitive to k+. the binding of k+ ions to their high affinity sites displaces na+ ions from th ... | 2005 | 16055367 |
| bciv, a new paralyzing peptide obtained from the venom of the sea anemone bunodosoma caissarum. a comparison with the na+ channel toxin bciii. | sea anemones produce a wide variety of biologically active compounds, such as the proteinaceous neurotoxins and cytolysins. herein we report a new peptide, purified to homogeneity from the neurotoxic fraction of b. caissarum venom, by using gel filtration followed by rp-hplc, naming it as bciv. bciv is a 41 amino acid peptide (molecular mass of 4669 amu) possessing 6 cysteines covalently linked by three disulfide bonds. this toxin has 45 and 48% of identity when compared to apetx1 and apetx2 fro ... | 2006 | 17015047 |
| genetic heterogeneity of the blue swimming crab (portunus pelagicus) in thailand determined by aflp analysis. | genetic diversity and population differentiation of the blue swimming crab (portunus pelagicus) in thailand, originating from ranong and krabi located in the andaman sea (west) and chanthaburi, prachuap khiri khan, and suratthani located in the gulf of thailand (east), were examined by aflp analysis. high genetic diversity of p. pelagicus in thai waters was found (n=72). the four primer combinations generated 227 aflp fragments, and the percentage of polymorphic bands in each geographic sample w ... | 2007 | 17879155 |
| development of a species-diagnostic scar marker of the blue swimming crab (portunus pelagicus). | 2007 | 18000751 | |
| the crustacean gill (na+,k+)-atpase: allosteric modulation of high- and low-affinity atp-binding sites by sodium and potassium. | the blue crab, callinectes danae, tolerates exposure to a wide salinity range employing mechanisms of compensatory ion uptake when in dilute media. although the gill (na+,k+)-atpase is vital to hyperosmoregulatory ability, the interactions occurring at the sites of atp binding on the molecule itself are unknown. here, we investigate the modulation by na+ and k+ of homotropic interactions between the atp-binding sites, and of phosphoenzyme formation of the (na+,k+)-atpase from the posterior gills ... | 2008 | 18796291 |
| na+, k+-atpase activity in gill microsomes from the blue crab, callinectes danae, acclimated to low salinity: novel perspectives on ammonia excretion. | this investigation provides an extensive characterization of the modulation by atp, mg(2+), na(+), k(+) and nh(4)(+) of a gill microsomal (na(+),k(+))-atpase from callinectes danae acclimated to 15 per thousand salinity. novel findings are the lack of high-affinity atp-binding sites and a 10-fold increase in enzyme affinity for k(+) modulated by nh(4)(+), discussed regarding nh(4)(+) excretion in benthic marine crabs. the (na(+),k(+))-atpase hydrolyzed atp at a maximum rate of 298.7+/-16.7 nmol ... | 2009 | 19535031 |
| assessment of metal concentrations in muscles of the blue crab, callinectes danae s., from the santos estuarine system. | this study determined the concentrations of eleven metals in the blue crab, callinectes danae, from nine sites in the santos estuarine system of sao paulo state, brazil. the results were compared to guidelines established in the united states, europe and brazil for the safety of human consumers. muscles of blue crabs were removed by dissection and concentrations of al, cd, co, cr, cu, fe, hg, mn ni, pb and zn were determined. in general, the concentrations of metals were low, and the crabs were ... | 2012 | 22782356 |
| a preliminary assessment of metal bioaccumulation in the blue crab, callinectes danae s., from the sao vicente channel, sao paulo state, brazil. | the concentrations of metals in tissues of callinectes danae were evaluated, aiming to determine the bioaccumulation process of this species. gills presented the highest mean concentrations for most metals, except for hg (<lod) and zn (13.293 μg g(-1)). according to results of the principal component analysis, the type of tissue was distinguished due to the concentrations of metals. an evaluation of individuals from other sites of the santos estuarine system (where the sao vicente channel is inc ... | 2012 | 22349281 |
| pcbs, pbdes and organochlorine pesticides in crabs hepatus pudibundus and callinectes danae from santos bay, state of são paulo, brazil. | the occurrence of persistent organic pollutants (pops) as polychlorinated biphenyls (pcbs), organochlorine pesticides (ocps) and polybrominated diphenyl ethers (pbde) in crabs hepatus pudibundus and callinectesdanae was assessed from two different places inside of the santos bay and moela island near one of the most economically important metropolitan areas in southern brazil. among pops analyzed, ∑pcbs (222-923 ng g(-1)lipid weight) and ∑ddts (154-410 ng g(-1)lw) exhibited the highest concentra ... | 2012 | 22245435 |
| a stock assessment of the blue swimming crab portunus pelagicus (linnaeus, 1758) for sustainable management in kung krabaen bay, gulf of thailand. | a stock assessment of blue swimming crabs, portunus pelagicus was conducted with crab gill nets and collapsible crab traps at kung krabaen bay, in the eastern gulf of thailand, from 2008 to 2009. several key indicators show that p. pelagicus population is in crisis. fishing mortality shows an increase to 4.14. the exploitation rate is 0.71, higher than the optimal value of 0.38. the size of the mature females has also decreased from 8.10±0.39 cm to 7.52±1.14 cm. the average fecundity is 0.572×10 ... | 2014 | 25210587 |
| juvenile development of callinectes danae smith, 1869 (crustacea, decapoda, brachyura, portunidae) under laboratory conditions. | the juvenile development of callinectes danae was investigated from megalopae obtained in neuston samples at ubatuba, são paulo, brazil. the individuals were raised in the laboratory under constant temperature (25 ± 1°c), filtered sea water from the collection location (35‰), and natural photoperiod. newly hatched artemia sp. nauplii were offered as food on a daily basis and ornamental-fish food was also provided for the juveniles from the 4th stage on. twelve stages of the juvenile phase were o ... | 2014 | 24676164 |
| reproductive features of the swimming crab callinectes danae(crustacea, portunoidea) on the subtropical coast of brazil: a sampling outside the estuary. | the life cycle of the crab callinectes danae is estuarine-dependent, and studies on aspects of their biology should also cover marine areas. the present study investigated the sexual maturity, as well as habitat preference by adults in different gonadal stages, and the crabs' reproductive periodicity outside the estuary. three bays on the subtropical southeastern coast of brazil were sampled monthly for two years. for each bay, six transects were established, four of them parallel to the beach l ... | 2015 | 26465730 |
| characterization of the complete mitochondrial genome of portunus pelagicus with implications for phylogenomics. | this study determined the mitochondrial genome structure of the blue swimming crab (portunus pelagicus), and elucidated its phylogenetic relationships among the species within the order decapoda. the complete mitochondrial genome was 16,155 bp long, and contained 13 protein-coding genes, 22 transfer rna genes, 2 ribosomal rna genes, and 1 dna control region. the gene order of the genome was the same as that found within the family portunidae. twenty-three genes were on the heavy strand and 14 we ... | 2016 | 27706563 |