Oncorhynchus kawamurae “Kunimasu,” a deepwater trout, discovered in Lake Saiko, 70 years after extinction in the original habitat, Lake Tazawa, Japan

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概要

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• 田沢湖で絶滅した固有種クニマス（サケ科）の山梨県西湖での発見. 京都大学プレスリリース. 2011-02-22.Oncorhynchus kawamurae (Osteichthyes: Salmonidae) (common name “Kunimasu”), a species endemic to Lake Tazawa, Akita Prefecture, Japan, was believed to have been extinct since 1940. However, nine specimens were discovered in March and April 2010 in Lake Saiko, Yamanashi Prefecture, one of the lakes to which eyed eggs of the species were introduced in 1935. These were identified as O. kawamurae because of having 47–62 pyloric caeca, 37–43 gill-rakers, a black-colored body, and spawning at 30–40 m depth in early spring, which are unique characteristics within Oncorhynchus. Furthermore, the distinctiveness of Kunimasu from sympatric kokanee (O. nerka) was supported by microsatellite DNA data.

• 2011-04-25

著者

• Nakabo Tetsuji

  The Kyoto University Museum

• NAKAYAMA Kouji

  Field Science Education and Research Center, Kyoto University

• Miyazawa Masayuki

  Office Of Liaison And Cooperative Research Tokyo University Of Marine Science And Technology

• MUTO Nozomu

  Graduate School of Agriculture, Kyoto University

• Nakayama Kouji

  Field Science Education And Research Center Kyoto University

• Muto Nozomu

  Graduate School Of Agriculture Kyoto University

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