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| The crustacean scavenger guild in Antarctic shelf, bathyal and abyssal communities De Broyer, C.; Nyssen, F.; Dauby, P. (2004). The crustacean scavenger guild in Antarctic shelf, bathyal and abyssal communities. Deep-Sea Res., Part II, Top. Stud. Oceanogr. 51(14-16): 1733-1752. dx.doi.org/10.1016/j.dsr2.2004.06.032
In: Deep-Sea Research, Part II. Topical Studies in Oceanography. Pergamon: Oxford. ISSN 0967-0645; e-ISSN 1879-0100
Is gerelateerd aan: De Broyer, C.; Nyssen, F.; Dauby, P. (2005). The crustacean scavenger guild in Antarctic shelf, bathyal and abyssal communities, in: Nyssen, F. Role of benthic amphipods in Antarctic trophodynamics: a multidisciplinary study. pp. 138-176, meer
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Distribution > Geographical distribution Species diversity Amphipoda [WoRMS]; Cirolanidae Dana, 1852 [WoRMS]; Crustacea [WoRMS]; Isopoda [WoRMS]; Lysianassoidea Dana, 1849 [WoRMS]; Peracarida [WoRMS] PSW, Antarctica, South Shetland I. [Marine Regions]; PSW, Scotia Sea [Marine Regions]; PSW, Weddell Sea [Marine Regions] Marien/Kust |
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| Abstract |
Some 68,000 peracarid crustaceans from 62 species were collected. About 98% of individuals belonged to the amphipod superfamily Lysianassoidea, and 2% to the isopod family Cirolanidae. Of these species, 31, including 26 lysianassoids (1400 individuals), were collected deeper than 1000 m. High species richness was discerned for the eastern Weddell Sea shelf compared with other Antarctic areas. The Antarctic slope also seems to be richer in species than other areas investigated in the world, while in the abyss, scavenger species richness appears to be lower in Antarctica. A richness gradient was thus observed from the shelf to the deep. For amphipods, a number of species extend their distribution from the shelf to the slope and only one to the abyssal zone. Amphipod species showed degrees of adaptation to necrophagy. The functional adaptations of the mandible and the storage function of the gut are discussed. Feeding experiments conducted on lysianassoid species collected at great depths and maintained in aquaria showed a mean feeding rate of about 1.4–4.1% dry body weight day-1, which is consistent with data obtained from other species. |
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