The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Wei Chen - One of the best experts on this subject based on the ideXlab platform.
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first mitochondrial genome for the red crab Charybdis feriata with implication of phylogenomics and population genetics
Scientific Reports, 2015Co-Authors: Chenhong Li, Jianxue Lu, Yangyang Gong, Wei Wang, Wei ChenAbstract:First mitochondrial genome for the red crab ( Charybdis feriata ) with implication of phylogenomics and population genetics
Antje Boetius - One of the best experts on this subject based on the ideXlab platform.
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Mass sedimentation of the swimming crab Charybdis smithii (Crustacea: Decapoda) in the deep Arabian Sea.
Deep Sea Research Part II: Topical Studies in Oceanography, 2000Co-Authors: Bernd Christiansen, Antje BoetiusAbstract:Abstract During cruise Meteor 33/1 in the northern Arabian Sea in September/October 1995, large numbers of the portunid crab Charybdis smithii were observed swimming in the open ocean. In a photographic survey at three abyssal stations in the northern Arabian Sea (NAST, WAST, CAST), even higher densities of Charybdis smithii – up to 1 crab m−2 – were found dead on the sea floor. Average sizes of the crabs were around 34–44 mm carapace width, indicating that the animals died prematurely, before returning to the breeding grounds presumable on the shelves of India or Oman. The average weight of the crabs was 10–14 g wet weight. From the photographic quantification it can be deduced that these large food falls represent a significant carbon input of at least 10–30% of the annual flux of POC as measured in sediment traps in this region. The exceptionally high microbial chitinase activity in the surface sediment layers detected at the same stations indicates that this energy is utilized and channelled into the deep-sea benthic food web of the deep Arabian Sea. There are frequent observations of dense Charybdis smithii swarms in the Arabian Sea from different years; however, it is not certain whether such large food falls as observed during M 33/1 are regular seasonal events that repeat each year.
Liyan Zhu - One of the best experts on this subject based on the ideXlab platform.
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Purification and characterization of phenoloxidase from crab Charybdis japonica.
Fish & shellfish immunology, 2006Co-Authors: Guangxing Liu, Lingling Yang, Tingjun Fan, Rishan Cong, Zhihong Tang, Wenjie Sun, Xianghong Meng, Liyan ZhuAbstract:Abstract Phenoloxidase (PO) from hemolymph of Charybdis japonica was purified by gel-filtration and ion-exchange chromatography, and characterized in terms of its molecular mass and enzymatic properties by using l -dihydroxyphenylalanine ( l -DOPA) as the specific substrate. It was found that prophenoloxidase (proPO), isolated as a monomeric protein, had a molecular mass of 69.5 kDa, and a 64.5 kDa PO molecule was often contained in preparations. The PO activity showed optimal pH of 6.0, optimal temperature of 40 °C, and an apparent Km value of 3.41 on l -DOPA, and 7.97 on catechol. PO activity was extremely sensitive to sodium sulfite and 1-phenyl-2-thiourea, and very sensitive to thiourea and benzoic acid. Based on its inhibition characteristics and the substrate affinity, this PO was classified as a kind of o-diphenoloxidase. The PO activity was also strongly inhibited by Zn2+, Mg2+, ethylenediaminetetraacetic acid (EDTA) and diethyldithiocarbamate (DETC). The results with EDTA, DETC, and some metal ions, combined with the perfect recovery effect of Cu2+ on DETC-inhibited PO activity, indicate that Charybdis PO is most probably a copper-containing metalloenzyme.
Chenhong Li - One of the best experts on this subject based on the ideXlab platform.
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first mitochondrial genome for the red crab Charybdis feriata with implication of phylogenomics and population genetics
Scientific Reports, 2015Co-Authors: Chenhong Li, Jianxue Lu, Yangyang Gong, Wei Wang, Wei ChenAbstract:First mitochondrial genome for the red crab ( Charybdis feriata ) with implication of phylogenomics and population genetics
Bernd Christiansen - One of the best experts on this subject based on the ideXlab platform.
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Mass sedimentation of the swimming crab Charybdis smithii (Crustacea: Decapoda) in the deep Arabian Sea.
Deep Sea Research Part II: Topical Studies in Oceanography, 2000Co-Authors: Bernd Christiansen, Antje BoetiusAbstract:Abstract During cruise Meteor 33/1 in the northern Arabian Sea in September/October 1995, large numbers of the portunid crab Charybdis smithii were observed swimming in the open ocean. In a photographic survey at three abyssal stations in the northern Arabian Sea (NAST, WAST, CAST), even higher densities of Charybdis smithii – up to 1 crab m−2 – were found dead on the sea floor. Average sizes of the crabs were around 34–44 mm carapace width, indicating that the animals died prematurely, before returning to the breeding grounds presumable on the shelves of India or Oman. The average weight of the crabs was 10–14 g wet weight. From the photographic quantification it can be deduced that these large food falls represent a significant carbon input of at least 10–30% of the annual flux of POC as measured in sediment traps in this region. The exceptionally high microbial chitinase activity in the surface sediment layers detected at the same stations indicates that this energy is utilized and channelled into the deep-sea benthic food web of the deep Arabian Sea. There are frequent observations of dense Charybdis smithii swarms in the Arabian Sea from different years; however, it is not certain whether such large food falls as observed during M 33/1 are regular seasonal events that repeat each year.