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Title: Oncorhynchus kawamurae “Kunimasu,” a deepwater trout, discovered in Lake Saiko, 70 years after extinction in the original habitat, Lake Tazawa, Japan
Authors: Nakabo, Tetsuji
Nakayama, Kouji  kyouindb  KAKEN_id
Muto, Nozomu
Miyazawa, Masayuki
Author's alias: 中坊, 徹次
中山, 耕至
武藤, 望生
宮澤, 正之
Keywords: Oncorhynchus kawamurae
Deepwater trout
Supposed extinction
Morphological and molecular data
Issue Date: 2011
Publisher: Springer
Journal title: Ichthyological Research
Volume: 58
Issue: 2
Start page: 180
End page: 183
Abstract: 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.
Description: 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.
Rights: The final publication is available at
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
DOI(Published Version): 10.1007/s10228-011-0204-8
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