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北海道南西部における秋季のスケトウダラの分布と成熟

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Title: 北海道南西部における秋季のスケトウダラの分布と成熟
Other Titles: Distribution and Maturation of Adult Walleye Pollock in Autumn in the Japan Sea off Southwest Hokkaido
Authors: 亀井, 佳彦1 Browse this author
高津, 哲也2 Browse this author →KAKEN DB
高木, 省吾3 Browse this author
中谷, 敏邦4 Browse this author →KAKEN DB
高橋, 豊美5 Browse this author →KAKEN DB
前田, 辰昭6 Browse this author →KAKEN DB
Authors(alt): Kamei, Yoshihiko1
Takatsu, Tetsuya2
Takagi, Shogo3
Nakatani, Toshikuni4
Takahashi, Toyomi5
Maeda, Tatsuaki6
Keywords: スケトウダラ
北海道南西部沖合
分布
成熟
産卵回遊
Issue Date: 15-Mar-1999
Publisher: 日本水産学会
Journal Title: 日本水産学会誌
Journal Title(alt): Bulletin of the Japanese Society of Scientific Fisheries
Volume: 65
Issue: 2
Start Page: 223
End Page: 229
Publisher DOI: 10.2331/suisan.65.223
Abstract: In order to elucidate the association between the distribution and maturation of adult walleye pollock Theragra chalcogramma, otter trawl samplings were carried out in the Japan Sea off the southwest Hokkaido in October from 1989 to 1994. CPUE values of walleye pollock were significantly higher in the coastal region than those in the offshore region through the sampling years except for 1994. Proportions of males were significantly higher in the coastal region except for 1993 and 1994. Many males were nearly mature, and no differences in male gonad indices were found either between coastal and offshore regions or among the coastal areas. In contrast, females collected in the coastal region were more mature than those in the offshore region. Clear geographical differences in body length were not found either among males or among females. Sexual differences in reproductive behavior and maturity might be responsible for the skewed distribution pattern of adult walleye pollock in October.
Rights: 本文データは学協会の許諾に基づきCiNiiから複製したものである
© 1999 公益社団法人日本水産学会
© 1999 The Japanese Society of Fisheries Science
(Relation)isversionof: http://ci.nii.ac.jp/naid/110003144779
Type: article
URI: http://hdl.handle.net/2115/38418
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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