成熟度および鱗相によるシロザケの系群識別〔英文〕

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概要

• 論文の詳細を見る

• The origin of four-year-old chum salmon caught in the Bering Sea in July, 1981 was estimated from their gonad weight and scale characters. There were three different maturity groups in the gonad weight frequency distributions for both female and male chum salmon. The maturing group with lower gonad weight (MT2) had more circuli and narrower width of the first year zone of the scale than those of the immature group (MT1) and the maturing group with higher gonad weight (MT3). A comparison of the scale characters of these three groups with those of chum salmon caught in the coastal regions showed that the MT1 group was similar to U.S.S.R. and Japanese chum salmon, the MT2 group was similar to Japanese chum salmon, and the MT3 group was similar to U.S.S.R. chum salmon. This suggests that different maturity groups in the high seas catch correspond to stocks from different geographical regions.

• 日本水産學會の論文

著者

• 石田 行正

  遠洋水産研究所

• 高木 健治

  北海道区水産研究所

• 伊藤 外夫

  遠洋水産研究所

関連論文

• さけ・ます資源および表層生物の長期モニタリング
• 小田和湾におけるアミメハギの成長と成熟〔英文〕
• 平行流し網実験による漁獲効率とシロザケ資源量の推定〔英文〕
• 西部北太平洋におけるギンザケの成長変動〔英文〕
• 成熟度および鱗相によるシロザケの系群識別〔英文〕

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