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Paralithodes platypus
The blue king crab, ''Paralithodes platypus'', is a species of king crab which lives near St. Matthew Island, the Pribilof Islands, and the Diomede Islands, Alaska, with further populations along the coasts of Japan and Russia. Blue king crabs from the Pribilof Islands are the largest of all the king crabs, sometimes exceeding in weight.
==Fisheries ==
Commercial blue king crab harvest around the eastern Bering Sea began in the mid-1960s and peaked in 1981 with a catch of . The Pribilof Island harvest by the United States peaked in 1980 at and was closed in 1988 due to population decline, then again in 1999 after being opened for three years. The St. Matthew fishery peaked in 1983 with but experienced a similar decline and was closed in 1999. It was opened in 2009, and was featured on the television show ''Deadliest Catch''. The St. Matthew stock is rebuilding but the fishery remains closed, while the Pribilof stock has not drastically improved.〔〔 Diomede blue king crabs have never been harvested commercially, but support a subsistence fishery for the Native Village of Diomede, Alaska, population 170.
Colder water slows the rate of crab growth and crabs at northern latitudes are often smaller than more southern crabs. Commercial harvest of blue king crabs at the Pribilof Islands is limited to males with a carapace width (CW) over and St. Matthew Island is limited to crabs with CW greater than ,〔 corresponding to crabs over carapace length (CL). Diomede blue king crabs are similar in size to St. Matthew Island crabs.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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