First report of the occurrence of a female Amur sturgeon Acipenser schrenckii in advanced stages of oogenesis, off the coast of Mombetsu, Hokkaido, Japan

First report of the occurrence of a female Amur sturgeon Acipenser schrenckii in advanced stages of oogenesis, off the coast of Mombetsu, Hokkaido, Japan

A female Amur sturgeon Acipenser schrenckii was captured by a salmon set-net at the coast of Mombetsu, Hokkaido, Japan, on 2 November 2016. The sturgeon was 164 cm in total length, 156 cm in fork length and 24 kg in body weight. The GSI of the sturgeon was 15.8 and the mean diameter of the largest g...

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Veröffentlicht in:Coastal marine science 2018-01, Vol.41 (1), p.7-10
Hauptverfasser: Hagihara, Seishi, Azuma, Noriko, Suyama, Kiichi, Katakura, Seiji, Ijiri, Shigeho, Adachi, Shinji
Format: Artikel
Sprache:eng
Schlagworte:
Acipenser schrenckii
Females
Gametogenesis
Gonadosomatic index
Marine
Oogenesis
Reproduction
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Zusammenfassung:A female Amur sturgeon Acipenser schrenckii was captured by a salmon set-net at the coast of Mombetsu, Hokkaido, Japan, on 2 November 2016. The sturgeon was 164 cm in total length, 156 cm in fork length and 24 kg in body weight. The GSI of the sturgeon was 15.8 and the mean diameter of the largest group of oocytes was 2.5 mm and these were at the midvitellogenic stage. This is first report of a female Amur sturgeon in advanced stages of gametogenesis from coastal Japan.
ISSN:1349-3000