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寄生性カイアシ類Haemobaphes dicerausおよびClavella perfidaがスケトウダラの成長・成熟におよぼす影響

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Title: 寄生性カイアシ類Haemobaphes dicerausおよびClavella perfidaがスケトウダラの成長・成熟におよぼす影響
Other Titles: Influence of the parasitic copepod Haemobaphes diceraus and Clavella perfida on growth and maturity of walleye pollock Theragra chalcogramma
Authors: 片倉, 靖次1 Browse this author
桜井, 泰憲2 Browse this author →KAKEN DB
吉田, 英雄3 Browse this author
西村, 明4 Browse this author
小西, 健志5 Browse this author
西山, 恒夫6 Browse this author
Authors(alt): Katakura, Seiji1
Sakurai, Yasunori2
Yoshida, Hideo3
Nishimura, Akira4
Konishi, Kenji5
Nishiyama, Tsuneo6
Keywords: スケトウダラ
Theragra chalcogramma
寄生性カイアシ類
Haemobaphes diceraus
Clavella perfida
成長・成熟
ゴンボスケソ
Issue Date: 2004
Publisher: 日本水産学会
Journal Title: 日本水産学会誌
Volume: 70
Issue: 3
Start Page: 324
End Page: 332
Publisher DOI: 10.2331/suisan.70.324
Abstract: The effects of infection with parasitic copepods Haemobaphes diceraus and Clavell perfida on the growth and maturity of walleye pollock Theragra Thalcogramma off the coast of eastern Hokkaido, Japan were examined in the feeding season and spawning season. In the feeding season, the condition factor (KF) and hepatic somatic index (HSI) of walleye pollock decreased as the number of H. diceraus increased, but were not related to the number of C. perfida. In the spawning season, the KF, HSI, and gonadic somatic index (GSI) of both sexes of fish decreased as the number of H. diceraus increased. Reproductively spent fish were more often infected with H. diceraus than those of other maturity levels were. No atretic oocytes were detected in the gonads infected with H. diceraus. Histological observation of fish gonads suggests that H. diceraus infection may cause spawning to occur earlier or to be suspended. The lengths of fish at age did not differ between individuals infected with H. diceraus and uninfected ones. The infection rate of H. diceraus increased steadily with age, but no more than three H. dicer aus per host were observed. We conclude that H. diceraus infection significantly influences the reproduction of walleye pollock through the nutritional condition.
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
© 2004 公益社団法人日本水産学会
© 2004 The Japanese Society of Fisheries Science
Type: article
URI: http://hdl.handle.net/2115/35246
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: 桜井 泰憲

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