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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ftccsdartic:oai:HAL:hal-04201962v1 2023-10-09T21:49:46+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 Sciences et Technologies Halieutiques (STH) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) 2017-08 https://hal.science/hal-04201962 https://doi.org/10.1139/facets-2017-0005 en eng HAL CCSD Canadian Science Publishing info:eu-repo/semantics/altIdentifier/doi/10.1139/facets-2017-0005 hal-04201962 https://hal.science/hal-04201962 doi:10.1139/facets-2017-0005 ISSN: 2371-1671 Facets https://hal.science/hal-04201962 Facets, 2017, 2, pp.660-681. ⟨10.1139/facets-2017-0005⟩ [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2017 ftccsdartic https://doi.org/10.1139/facets-2017-0005 2023-09-23T22:55:17Z 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) FACETS 2 2 660 681 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
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[SDV]Life Sciences [q-bio] |
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[SDV]Life Sciences [q-bio] 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 |
[SDV]Life Sciences [q-bio] |
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. |
author2 |
Sciences et Technologies Halieutiques (STH) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
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 |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-04201962 https://doi.org/10.1139/facets-2017-0005 |
genre |
atlantic cod Gadus morhua Newfoundland |
genre_facet |
atlantic cod Gadus morhua Newfoundland |
op_source |
ISSN: 2371-1671 Facets https://hal.science/hal-04201962 Facets, 2017, 2, pp.660-681. ⟨10.1139/facets-2017-0005⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1139/facets-2017-0005 hal-04201962 https://hal.science/hal-04201962 doi:10.1139/facets-2017-0005 |
op_doi |
https://doi.org/10.1139/facets-2017-0005 |
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1779312806066126848 |