Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod ( Gadus morhua )
We tested the hypothesis that reproductive success in Atlantic cod (Gadus morhua) is random with respect to similarity in body size between mates. Immediately prior to their natural breeding periods, groups of 52–93 cod from three Northwest Atlantic populations were transported to a large (15 m diam...
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Online Access: | http://dx.doi.org/10.1139/f06-182 http://www.nrcresearchpress.com/doi/pdf/10.1139/f06-182 |
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crcansciencepubl:10.1139/f06-182 2023-12-17T10:27:00+01:00 Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod ( Gadus morhua ) Rowe, Sherrylynn Hutchings, Jeffrey A Skjæraasen, Jon Egil 2007 http://dx.doi.org/10.1139/f06-182 http://www.nrcresearchpress.com/doi/pdf/10.1139/f06-182 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 2, page 219-226 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2007 crcansciencepubl https://doi.org/10.1139/f06-182 2023-11-19T13:38:23Z We tested the hypothesis that reproductive success in Atlantic cod (Gadus morhua) is random with respect to similarity in body size between mates. Immediately prior to their natural breeding periods, groups of 52–93 cod from three Northwest Atlantic populations were transported to a large (15 m diameter, 4 m deep) tank where they spawned undisturbed at densities similar to those in nature. Based on microsatellite DNA-parentage assignment of 8913 offspring from four spawning groups, females and males achieved their highest reproductive success when breeding with mates that were larger than themselves. Our observations are consistent with the hypothesis that some form of intrasexual competition or mate choice is a constituent of the mating system of this species and that this can have an important influence on individual fitness. Our results further suggest that reductions in the mean and variance in body size of commercially exploited marine fishes concomitant with size-selective harvesting may have greater negative consequences for population recovery than previously thought. Article in Journal/Newspaper atlantic cod Gadus morhua Northwest Atlantic Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 64 2 219 226 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Rowe, Sherrylynn Hutchings, Jeffrey A Skjæraasen, Jon Egil Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod ( Gadus morhua ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
We tested the hypothesis that reproductive success in Atlantic cod (Gadus morhua) is random with respect to similarity in body size between mates. Immediately prior to their natural breeding periods, groups of 52–93 cod from three Northwest Atlantic populations were transported to a large (15 m diameter, 4 m deep) tank where they spawned undisturbed at densities similar to those in nature. Based on microsatellite DNA-parentage assignment of 8913 offspring from four spawning groups, females and males achieved their highest reproductive success when breeding with mates that were larger than themselves. Our observations are consistent with the hypothesis that some form of intrasexual competition or mate choice is a constituent of the mating system of this species and that this can have an important influence on individual fitness. Our results further suggest that reductions in the mean and variance in body size of commercially exploited marine fishes concomitant with size-selective harvesting may have greater negative consequences for population recovery than previously thought. |
format |
Article in Journal/Newspaper |
author |
Rowe, Sherrylynn Hutchings, Jeffrey A Skjæraasen, Jon Egil |
author_facet |
Rowe, Sherrylynn Hutchings, Jeffrey A Skjæraasen, Jon Egil |
author_sort |
Rowe, Sherrylynn |
title |
Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod ( Gadus morhua ) |
title_short |
Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod ( Gadus morhua ) |
title_full |
Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod ( Gadus morhua ) |
title_fullStr |
Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod ( Gadus morhua ) |
title_full_unstemmed |
Nonrandom mating in a broadcast spawner: mate size influences reproductive success in Atlantic cod ( Gadus morhua ) |
title_sort |
nonrandom mating in a broadcast spawner: mate size influences reproductive success in atlantic cod ( gadus morhua ) |
publisher |
Canadian Science Publishing |
publishDate |
2007 |
url |
http://dx.doi.org/10.1139/f06-182 http://www.nrcresearchpress.com/doi/pdf/10.1139/f06-182 |
genre |
atlantic cod Gadus morhua Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Northwest Atlantic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 2, page 219-226 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f06-182 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
64 |
container_issue |
2 |
container_start_page |
219 |
op_container_end_page |
226 |
_version_ |
1785578762059907072 |