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''Oncorhynchus kawamurae'', the ''black kokanee'', or ''kunimasu'' in Japanese,〔 is a Japanese species of salmon which was thought to had gone extinct in 1940, but was discovered to still have a living population in 2010.〔Jay Alabaster (Associated Press) (Scientist says he found Japan fish thought extinct ). December 15, 2010〕 ''Oncorhynchus kawamurae'' is related to the sockeye salmon, ''Oncorhynchus nerka'', and has been earlier treated as its subspecies ''O. nerka kawamurae''. The fish was thought to have gone extinct in 1940 when a hydroelectric project made Lake Tazawa, its native lake, more acidic. Prior to that, 100,000 eggs were transferred to Lake Saiko, which is located about 310 miles (500 kilometers) south of Lake Tazawa, but this attempt to save the fish was thought to have been unsuccessful. However, in 2010, a team of researchers including a celebrity biologist, 'Sakana-kun', discovered living members of the species in Saiko Lake.〔 The fish is dark olive with black spots on its back, and grows to approximately one foot (30 centimeters) in length.〔 ==References== *´ 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「Oncorhynchus kawamurae」の詳細全文を読む スポンサード リンク
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