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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Branchinecta gaini ： ウィキペディア英語版 Branchinecta gaini ''Branchinecta gaini'' is a species of fairy shrimp from Antarctica and Patagonia. It is the largest freshwater invertebrate in Antarctica, at long. It lives on bacteria and other organisms, surviving the winter as resting eggs. ==Distribution== ''B. gaini'' is found from "half-way down the Antarctic Peninsula" northwards, including southernmost South America and subantarctic islands such as South Georgia and the South Orkney Islands. It is the only fairy shrimp on mainland Antarctica, where it is "rather widespread on the Antarctic Peninsula"; records of "''Branchinecta granulosa''" from Antarctica are all misidentifications of ''B. gaini''. In the South Shetland Islands, ''B. gaini'' has been recorded from the lakes on the ice-free Byers Peninsula of Livingston Island (alongside ''Boeckella poppei'' and the benthic cladoceran ''Macrothrix ciliata''), in Lake Wujka, and in Sombre Lake on Signy Island (alongside ''Boeckella poppei'' and the carnivorous ''Parabroteus sarsi''). The only known fossil records of the genus ''Branchinecta'' are of ''B. gaini''; its eggs have been found in mid to late Holocene (4,200 BP) lake deposits on James Ross Island, on the east side of the Antarctic Peninsula. ''B. gaini'' no longer occurs on James Ross Island, presumably because the lakes are unfrozen for too short a period for ''B. gaini'' to complete its life cycle.〔 The egg cases were found to be most abundant during the Holocene climatic optimum, indicating that cyanobacterial mats must have been present in the lake then. Eggs dating from 5,500 BP have also been found on Signy Island, where the species persists.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Branchinecta gaini」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.