Energetic consequences of reproduction in Atlantic cod ( Gadus morhua) in relation to spawning level of somatic energy reserves
The influence of a lower condition on reproductive investment, somatic energy losses, and postspawning condition of Atlantic cod (Gadus morhua) was examined under the hypothesis that females, in response to lower available energy reserves, would reduce reproductive investment in order to limit somat...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
2000
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Online Access: | http://dx.doi.org/10.1139/f00-022 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-022 |
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crcansciencepubl:10.1139/f00-022 2024-09-15T17:55:25+00:00 Energetic consequences of reproduction in Atlantic cod ( Gadus morhua) in relation to spawning level of somatic energy reserves Lambert, Yvan Dutil, Jean-Denis 2000 http://dx.doi.org/10.1139/f00-022 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-022 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 57, issue 4, page 815-825 ISSN 0706-652X 1205-7533 journal-article 2000 crcansciencepubl https://doi.org/10.1139/f00-022 2024-08-08T04:13:35Z The influence of a lower condition on reproductive investment, somatic energy losses, and postspawning condition of Atlantic cod (Gadus morhua) was examined under the hypothesis that females, in response to lower available energy reserves, would reduce reproductive investment in order to limit somatic energy losses. Laboratory experiments revealed that female cod with high prespawning condition factors ended reproduction in better condition than females with low prespawning condition factors. Fecundity and total egg dry weight were significantly lower in poor-condition females. The loss in somatic mass and energy in these poor-condition females was nevertheless higher, in relative terms, than the losses experienced by females in good condition. Consequently, energy reserves invested in reproduction by poor-condition females increase their risk of mortality. In the northern Gulf of St. Lawrence during the early 1990s, reproductive females had lower fecundities and were in worse prespawning and postspawning condition. The condition of spent females suggested a greater impact of changes in environmental conditions on adult than on immature cod. Reproductive potential and possibly recruitment may have suffered from that situation and could have contributed to the failure of that stock to recover despite the moratorium on commercial fishing. Article in Journal/Newspaper atlantic cod Gadus morhua Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 57 4 815 825 |
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Canadian Science Publishing |
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English |
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The influence of a lower condition on reproductive investment, somatic energy losses, and postspawning condition of Atlantic cod (Gadus morhua) was examined under the hypothesis that females, in response to lower available energy reserves, would reduce reproductive investment in order to limit somatic energy losses. Laboratory experiments revealed that female cod with high prespawning condition factors ended reproduction in better condition than females with low prespawning condition factors. Fecundity and total egg dry weight were significantly lower in poor-condition females. The loss in somatic mass and energy in these poor-condition females was nevertheless higher, in relative terms, than the losses experienced by females in good condition. Consequently, energy reserves invested in reproduction by poor-condition females increase their risk of mortality. In the northern Gulf of St. Lawrence during the early 1990s, reproductive females had lower fecundities and were in worse prespawning and postspawning condition. The condition of spent females suggested a greater impact of changes in environmental conditions on adult than on immature cod. Reproductive potential and possibly recruitment may have suffered from that situation and could have contributed to the failure of that stock to recover despite the moratorium on commercial fishing. |
format |
Article in Journal/Newspaper |
author |
Lambert, Yvan Dutil, Jean-Denis |
spellingShingle |
Lambert, Yvan Dutil, Jean-Denis Energetic consequences of reproduction in Atlantic cod ( Gadus morhua) in relation to spawning level of somatic energy reserves |
author_facet |
Lambert, Yvan Dutil, Jean-Denis |
author_sort |
Lambert, Yvan |
title |
Energetic consequences of reproduction in Atlantic cod ( Gadus morhua) in relation to spawning level of somatic energy reserves |
title_short |
Energetic consequences of reproduction in Atlantic cod ( Gadus morhua) in relation to spawning level of somatic energy reserves |
title_full |
Energetic consequences of reproduction in Atlantic cod ( Gadus morhua) in relation to spawning level of somatic energy reserves |
title_fullStr |
Energetic consequences of reproduction in Atlantic cod ( Gadus morhua) in relation to spawning level of somatic energy reserves |
title_full_unstemmed |
Energetic consequences of reproduction in Atlantic cod ( Gadus morhua) in relation to spawning level of somatic energy reserves |
title_sort |
energetic consequences of reproduction in atlantic cod ( gadus morhua) in relation to spawning level of somatic energy reserves |
publisher |
Canadian Science Publishing |
publishDate |
2000 |
url |
http://dx.doi.org/10.1139/f00-022 http://www.nrcresearchpress.com/doi/pdf/10.1139/f00-022 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 57, issue 4, page 815-825 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f00-022 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
57 |
container_issue |
4 |
container_start_page |
815 |
op_container_end_page |
825 |
_version_ |
1810431708074344448 |