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Helice tridens : ウィキペディア英語版 | Helice tridens
''Helice tridens'' is a species of crab which lives on mudflats around the coasts of Japan and the Korean Peninsula. ==Ecology== It is semi-terrestrial, returning to the sea to spawn. The species appears to be adversely affected by the presence of raccoons (''Procyon lotor''), an invasive predator.〔 ''H. tridens'' has a salinity requirement which lies between those of two other estuarine crabs in Japan, ''Helicana japonica'' and ''Chiromantes dehaani''. Smaller individuals shelter in burrows in reed marshes, apparently in order to avoid cannibalism; this may also be the reason for the migration of larger individuals to brackish water lagoons in summer, when the crabs exceed their carrying capacity.
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「Helice tridens」の詳細全文を読む
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