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北海道後志沿岸におけるクロソイの年齢と成長

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Title: 北海道後志沿岸におけるクロソイの年齢と成長
Other Titles: Age and Growth of Sebastes schlegeli in the Coastal Waters of Shiribeshi Subprefecture, Hokkaido, Japan
Authors: 佐々木, 正義1 Browse this author
蜜谷, 法行2 Browse this author
西内, 修一3 Browse this author
塩川, 文康4 Browse this author
高橋, 豊美5 Browse this author
Authors(alt): Sasaki, Masayoshi1
Mitsutani, Noriyuki2
Nishiuchi, Syuichi3
Shiokawa, Fumiyasu4
Takahashi, Toyomi5
Keywords: age
cross-section method
growth
otolith
Sebastes schlegeli
Issue Date: Nov-2004
Publisher: 水産海洋学会
Journal Title: 水産海洋研究
Journal Title(alt): Bulletin of the Japanese Society of Fisheries Oceanography
Volume: 68
Issue: 4
Start Page: 232
End Page: 238
Abstract: Age and growth of Sebastes schlegeli collected from the coastal waters of the Shiribeshi subprefecture in Hokkaido were studied. Observations of the otolith margin verified that annuli (outer margins of the opaque zone) were formed chiefly in June. This period accorded approximately with the parturition season (late May-mid-June) that was judged from the seasonal change in gonadosomatic index, occurrence of eyed eggs and histological observations of ovaries. The surface method of otolith aging was found to be inadequate for aging of S. schlegeli older than 7 years because of the underestimation of age. A significant difference was found in the parameters of the growth equations between females and males. Growth of S. schlegeli was expressed by the von Bertalanffy asymptotic growth function as TLt=633.1(1-exp^[-0.160(t+0.965)]) for females and TLt=417.7(1-exp^[-0.363(t+0.368)]) for males, where TLt is the total length (mm) at age t (after parturition in years). Based on previously published data, the growth rate of S. schlegeli in this region was relatively low, especially in males, because of low temperatures during the winter and spring and the shortness of the high growth period of 10-20℃.
Type: article
URI: http://hdl.handle.net/2115/38885
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋 豊美

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