Reproductive investment in Atlantic cod populations off Newfoundland: Contrasting trends between males and females
Life history theory predicts selection for higher reproductive investment in response to increased mortality among mature individuals. We tested this prediction over the period from 1978 to 2013 for three populations of Atlantic cod (Gadus morhua) off Newfoundland. These populations were heavily fis...
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ftarchimer:oai:archimer.ifremer.fr:51111 2023-05-15T15:26:59+02:00 Reproductive investment in Atlantic cod populations off Newfoundland: Contrasting trends between males and females Baulier, Loic Morgan, M. Joanne Lilly, George R. Dieckmann, Ulf Heino, Mikko 2017-08 application/pdf https://archimer.ifremer.fr/doc/00400/51111/51893.pdf https://doi.org/10.1139/facets-2017-0005 https://archimer.ifremer.fr/doc/00400/51111/ eng eng Canadian Science Publishing, Nrc Research Press https://archimer.ifremer.fr/doc/00400/51111/51893.pdf doi:10.1139/facets-2017-0005 https://archimer.ifremer.fr/doc/00400/51111/ 2017 Baulier et al. This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. info:eu-repo/semantics/openAccess restricted use CC-BY Facets (2371-1671) (Canadian Science Publishing, Nrc Research Press), 2017-08 , Vol. 2 , P. 660-681 reproductive investment fisheries-induced evolution Atlantic cod gonad weight text Publication info:eu-repo/semantics/article 2017 ftarchimer https://doi.org/10.1139/facets-2017-0005 2021-09-23T20:29:55Z Life history theory predicts selection for higher reproductive investment in response to increased mortality among mature individuals. We tested this prediction over the period from 1978 to 2013 for three populations of Atlantic cod (Gadus morhua) off Newfoundland. These populations were heavily fished for a long period. We considered changes in standardized gonad weight as a proxy for changes in gonadal investment. We accounted for the allometry between gonad and body weight, individual body condition, water temperature, and potential spatial and density-dependent effects. Males display significant temporal trends in gonadal investment in all populations; in agreement with theoretical predictions, these trends show increased gonadal investments during the earlier part of the time series when mortality was high, with the trends leveling off or reversing after the later imposition of fishing moratoria. In contrast, females display patterns that are less consistent and expected; significant trends are detected only when accounting for density-dependent effects, with females in two populations unexpectedly showing a long-term decline in gonadal investment. Our results support the hypothesis that fisheries-induced evolution has occurred in gonadal investment in males, but not in females, and suggest that gonadal investment is more important for male reproductive success than expected in this lekking species. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) FACETS 2 2 660 681 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
reproductive investment fisheries-induced evolution Atlantic cod gonad weight |
spellingShingle |
reproductive investment fisheries-induced evolution Atlantic cod gonad weight Baulier, Loic Morgan, M. Joanne Lilly, George R. Dieckmann, Ulf Heino, Mikko Reproductive investment in Atlantic cod populations off Newfoundland: Contrasting trends between males and females |
topic_facet |
reproductive investment fisheries-induced evolution Atlantic cod gonad weight |
description |
Life history theory predicts selection for higher reproductive investment in response to increased mortality among mature individuals. We tested this prediction over the period from 1978 to 2013 for three populations of Atlantic cod (Gadus morhua) off Newfoundland. These populations were heavily fished for a long period. We considered changes in standardized gonad weight as a proxy for changes in gonadal investment. We accounted for the allometry between gonad and body weight, individual body condition, water temperature, and potential spatial and density-dependent effects. Males display significant temporal trends in gonadal investment in all populations; in agreement with theoretical predictions, these trends show increased gonadal investments during the earlier part of the time series when mortality was high, with the trends leveling off or reversing after the later imposition of fishing moratoria. In contrast, females display patterns that are less consistent and expected; significant trends are detected only when accounting for density-dependent effects, with females in two populations unexpectedly showing a long-term decline in gonadal investment. Our results support the hypothesis that fisheries-induced evolution has occurred in gonadal investment in males, but not in females, and suggest that gonadal investment is more important for male reproductive success than expected in this lekking species. |
format |
Article in Journal/Newspaper |
author |
Baulier, Loic Morgan, M. Joanne Lilly, George R. Dieckmann, Ulf Heino, Mikko |
author_facet |
Baulier, Loic Morgan, M. Joanne Lilly, George R. Dieckmann, Ulf Heino, Mikko |
author_sort |
Baulier, Loic |
title |
Reproductive investment in Atlantic cod populations off Newfoundland: Contrasting trends between males and females |
title_short |
Reproductive investment in Atlantic cod populations off Newfoundland: Contrasting trends between males and females |
title_full |
Reproductive investment in Atlantic cod populations off Newfoundland: Contrasting trends between males and females |
title_fullStr |
Reproductive investment in Atlantic cod populations off Newfoundland: Contrasting trends between males and females |
title_full_unstemmed |
Reproductive investment in Atlantic cod populations off Newfoundland: Contrasting trends between males and females |
title_sort |
reproductive investment in atlantic cod populations off newfoundland: contrasting trends between males and females |
publisher |
Canadian Science Publishing, Nrc Research Press |
publishDate |
2017 |
url |
https://archimer.ifremer.fr/doc/00400/51111/51893.pdf https://doi.org/10.1139/facets-2017-0005 https://archimer.ifremer.fr/doc/00400/51111/ |
genre |
atlantic cod Gadus morhua Newfoundland |
genre_facet |
atlantic cod Gadus morhua Newfoundland |
op_source |
Facets (2371-1671) (Canadian Science Publishing, Nrc Research Press), 2017-08 , Vol. 2 , P. 660-681 |
op_relation |
https://archimer.ifremer.fr/doc/00400/51111/51893.pdf doi:10.1139/facets-2017-0005 https://archimer.ifremer.fr/doc/00400/51111/ |
op_rights |
2017 Baulier et al. This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1139/facets-2017-0005 |
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660 |
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