Male reproductive competition in spawning aggregations of cod ( Gadus morhua, L.)
Abstract Reproductive competition may lead to a large skew in reproductive success among individuals. Very few studies have analysed the paternity contribution of individual males in spawning aggregations of fish species with huge census population sizes. We quantified the variance in male reproduct...
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crwiley:10.1046/j.0962-1083.2001.01424.x 2024-06-23T07:52:56+00:00 Male reproductive competition in spawning aggregations of cod ( Gadus morhua, L.) Bekkevold, D Hansen, M. M Loeschcke, V 2002 http://dx.doi.org/10.1046/j.0962-1083.2001.01424.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.0962-1083.2001.01424.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.0962-1083.2001.01424.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Molecular Ecology volume 11, issue 1, page 91-102 ISSN 0962-1083 1365-294X journal-article 2002 crwiley https://doi.org/10.1046/j.0962-1083.2001.01424.x 2024-06-04T06:49:03Z Abstract Reproductive competition may lead to a large skew in reproductive success among individuals. Very few studies have analysed the paternity contribution of individual males in spawning aggregations of fish species with huge census population sizes. We quantified the variance in male reproductive success in spawning aggregations of cod under experimental conditions over an entire spawning season. Male reproductive success was estimated by microsatellite‐based parentage analysis of offspring produced in six separate groups of spawning cod. In total, 1340 offspring and 102 spawnings distributed across a spawning season were analysed. Our results show that multiple males contributed sperm to most spawnings but that paternity frequencies were highly skewed among males, with larger males on average siring higher proportions of offspring. It was further indicated that male reproductive success was dependent on the magnitude of the size difference between a female and a male. We discuss our results in relation to the cod mating system. Finally, we suggest that the highly skewed distribution of paternity success observed in cod may be a factor contributing to the low effective population size/census population size ratios observed in many marine organisms. Article in Journal/Newspaper Gadus morhua Wiley Online Library Molecular Ecology 11 1 91 102 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Reproductive competition may lead to a large skew in reproductive success among individuals. Very few studies have analysed the paternity contribution of individual males in spawning aggregations of fish species with huge census population sizes. We quantified the variance in male reproductive success in spawning aggregations of cod under experimental conditions over an entire spawning season. Male reproductive success was estimated by microsatellite‐based parentage analysis of offspring produced in six separate groups of spawning cod. In total, 1340 offspring and 102 spawnings distributed across a spawning season were analysed. Our results show that multiple males contributed sperm to most spawnings but that paternity frequencies were highly skewed among males, with larger males on average siring higher proportions of offspring. It was further indicated that male reproductive success was dependent on the magnitude of the size difference between a female and a male. We discuss our results in relation to the cod mating system. Finally, we suggest that the highly skewed distribution of paternity success observed in cod may be a factor contributing to the low effective population size/census population size ratios observed in many marine organisms. |
format |
Article in Journal/Newspaper |
author |
Bekkevold, D Hansen, M. M Loeschcke, V |
spellingShingle |
Bekkevold, D Hansen, M. M Loeschcke, V Male reproductive competition in spawning aggregations of cod ( Gadus morhua, L.) |
author_facet |
Bekkevold, D Hansen, M. M Loeschcke, V |
author_sort |
Bekkevold, D |
title |
Male reproductive competition in spawning aggregations of cod ( Gadus morhua, L.) |
title_short |
Male reproductive competition in spawning aggregations of cod ( Gadus morhua, L.) |
title_full |
Male reproductive competition in spawning aggregations of cod ( Gadus morhua, L.) |
title_fullStr |
Male reproductive competition in spawning aggregations of cod ( Gadus morhua, L.) |
title_full_unstemmed |
Male reproductive competition in spawning aggregations of cod ( Gadus morhua, L.) |
title_sort |
male reproductive competition in spawning aggregations of cod ( gadus morhua, l.) |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1046/j.0962-1083.2001.01424.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.0962-1083.2001.01424.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.0962-1083.2001.01424.x |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Molecular Ecology volume 11, issue 1, page 91-102 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.0962-1083.2001.01424.x |
container_title |
Molecular Ecology |
container_volume |
11 |
container_issue |
1 |
container_start_page |
91 |
op_container_end_page |
102 |
_version_ |
1802644395797774336 |