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
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...
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日本水産学会
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Online Access: | http://hdl.handle.net/2115/35246 https://doi.org/10.2331/suisan.70.324 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/35246 2023-05-15T18:32:51+02:00 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 Influence of the parasitic copepod Haemobaphes diceraus and Clavella perfida on growth and maturity of walleye pollock Theragra chalcogramma 片倉, 靖次 桜井, 泰憲 吉田, 英雄 西村, 明 小西, 健志 西山, 恒夫 http://hdl.handle.net/2115/35246 https://doi.org/10.2331/suisan.70.324 jpn jpn 日本水産学会 http://ci.nii.ac.jp/naid/110003145727/ http://hdl.handle.net/2115/35246 日本水産学会誌, 70(3): 324-332 http://dx.doi.org/10.2331/suisan.70.324 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 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 487 article fthokunivhus https://doi.org/10.2331/suisan.70.324 2022-11-18T01:01:39Z 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. Article in Journal/Newspaper Theragra chalcogramma Copepods Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) NIPPON SUISAN GAKKAISHI 70 3 324 332 |
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Open Polar |
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Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
language |
Japanese |
topic |
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 487 |
spellingShingle |
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 487 片倉, 靖次 桜井, 泰憲 吉田, 英雄 西村, 明 小西, 健志 西山, 恒夫 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 |
topic_facet |
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 487 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
片倉, 靖次 桜井, 泰憲 吉田, 英雄 西村, 明 小西, 健志 西山, 恒夫 |
author_facet |
片倉, 靖次 桜井, 泰憲 吉田, 英雄 西村, 明 小西, 健志 西山, 恒夫 |
author_sort |
片倉, 靖次 |
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 |
title_short |
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 |
title_full |
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 |
title_fullStr |
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 |
title_full_unstemmed |
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 |
title_sort |
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 |
publisher |
日本水産学会 |
url |
http://hdl.handle.net/2115/35246 https://doi.org/10.2331/suisan.70.324 |
genre |
Theragra chalcogramma Copepods |
genre_facet |
Theragra chalcogramma Copepods |
op_relation |
http://ci.nii.ac.jp/naid/110003145727/ http://hdl.handle.net/2115/35246 日本水産学会誌, 70(3): 324-332 http://dx.doi.org/10.2331/suisan.70.324 |
op_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 |
op_doi |
https://doi.org/10.2331/suisan.70.324 |
container_title |
NIPPON SUISAN GAKKAISHI |
container_volume |
70 |
container_issue |
3 |
container_start_page |
324 |
op_container_end_page |
332 |
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1766217042399068160 |