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Studies on the ecology of the herring in the northern part of the Okhotsk Sea in summer. III, Geographical variations in fork length and scale pattern in 4year-old group

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タイトル: Studies on the ecology of the herring in the northern part of the Okhotsk Sea in summer. III, Geographical variations in fork length and scale pattern in 4year-old group
その他のタイトル: オホーツク海北部における夏季のニシンの研究. III, 4才群の体長および鱗相の地域差について
著者: Takahashi, Toyomi 著作を一覧する
発行日: 1978年
出版者: 日本水産学会 = The Japanese Society of Scientific Fisheries
誌名: 日本水産学会誌 = Bulletin of the Japanese Society of Scientific Fisheries
巻: 44
号: 2
開始ページ: 105
終了ページ: 116
出版社 DOI: 10.2331/suisan.44.105
抄録: For the purpose of elucidating the stock system of fish group chiefly composed of 4 year-old fish found around the area of the Ayan in the summers of 1971-1973, fork lengths and scale patterns of 4 year-old fish taken from the different areas in the northern part of the Okhotsk Sea were examined. It was confirmed that the mean fork length of 4 year-old fish around the area of the Ayan was consistently about 1 cm smaller than that of the eastern area of the Okhotsk. Scale patterns also differ considerably among areas and they are divided roughly into the two types of Tauisk and Ayan. The results of analyzing the ratio of distance among the annuli and the fork length estimated at the 1st annulus formation indicate that these two 4 year-old groups with the different scale patterns had lived under different circumstances after the first year of life. However, these fish groups are not always isolated from each other through the stages in development. Comparison of scale ratio Ri/fork length relationships shows that fish group in the area of the Ayan in 1973 is mixture, which arose during the third year of life, of fish with the different scale pattern of Tauisk and Ayan types. Otherwise, it was found that the fish with the specific values of scale ratio r2/r3 could be used as an indicator of presence of fish appeared around the area of the Ayan in each year.
Rights: ©1978 公益社団法人日本水産学会 The Japanese Society of Fisheries Science
©1978 公益社団法人日本水産学会 The Japanese Society of Fisheries Science
資料タイプ: article
URI: http://hdl.handle.net/2115/38568
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 高橋 豊美

 

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