Influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy
Various mechanisms of sexual selection can occur at both the whole organism and gamete levels. Fertilization success in salmonid fishes is largely determined by behavioural competition within and between "fighter" and "sneaker" male strategies, but is also influenced by interacti...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | https://scholar.uwindsor.ca/glierpub/31 https://doi.org/10.1139/F2012-007 |
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1031 2023-06-11T04:10:19+02:00 Influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy Weir, Laura K. Hutchings, Jeffrey A. Heath, Daniel D. 2012-01-01T08:00:00Z https://scholar.uwindsor.ca/glierpub/31 https://doi.org/10.1139/F2012-007 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/31 doi:10.1139/F2012-007 http://dx.doi.org/10.1139/F2012-007 Great Lakes Institute for Environmental Research Publications Biochemistry Biophysics and Structural Biology Biodiversity Biology Life Sciences Marine Biology text 2012 ftunivwindsor https://doi.org/10.1139/F2012-007 2023-05-06T19:03:38Z Various mechanisms of sexual selection can occur at both the whole organism and gamete levels. Fertilization success in salmonid fishes is largely determined by behavioural competition within and between "fighter" and "sneaker" male strategies, but is also influenced by interactions among gametes. We investigated the influence of density, fighter male presence, and major histocompatibility (MH) genotype on patterns of fertilization success in sneaker Atlantic salmon (Salmo salar). At low density and in the absence of fighter males, monopolization by single sneaker males occurred, suggesting that male-male competition was the main determinant of fertilization success. By contrast, at high density and (or) in the presence of fighter males, several sneakers succeeded in fertilizing eggs. Our study, the first to investigate the role of MH-mediated fertilization for a genetically based alternative male mating strategy, suggests that a larger proportion of eggs were fertilized by sneakers whose MH genotypes were more similar to those of the female than expected by chance. These findings highlight the importance of examining sexual selection under different competitive conditions. Text Atlantic salmon Salmo salar University of Windsor, Ontario: Scholarship at UWindsor Canadian Journal of Fisheries and Aquatic Sciences 69 4 670 680 |
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Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Biochemistry Biophysics and Structural Biology Biodiversity Biology Life Sciences Marine Biology |
spellingShingle |
Biochemistry Biophysics and Structural Biology Biodiversity Biology Life Sciences Marine Biology Weir, Laura K. Hutchings, Jeffrey A. Heath, Daniel D. Influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy |
topic_facet |
Biochemistry Biophysics and Structural Biology Biodiversity Biology Life Sciences Marine Biology |
description |
Various mechanisms of sexual selection can occur at both the whole organism and gamete levels. Fertilization success in salmonid fishes is largely determined by behavioural competition within and between "fighter" and "sneaker" male strategies, but is also influenced by interactions among gametes. We investigated the influence of density, fighter male presence, and major histocompatibility (MH) genotype on patterns of fertilization success in sneaker Atlantic salmon (Salmo salar). At low density and in the absence of fighter males, monopolization by single sneaker males occurred, suggesting that male-male competition was the main determinant of fertilization success. By contrast, at high density and (or) in the presence of fighter males, several sneakers succeeded in fertilizing eggs. Our study, the first to investigate the role of MH-mediated fertilization for a genetically based alternative male mating strategy, suggests that a larger proportion of eggs were fertilized by sneakers whose MH genotypes were more similar to those of the female than expected by chance. These findings highlight the importance of examining sexual selection under different competitive conditions. |
format |
Text |
author |
Weir, Laura K. Hutchings, Jeffrey A. Heath, Daniel D. |
author_facet |
Weir, Laura K. Hutchings, Jeffrey A. Heath, Daniel D. |
author_sort |
Weir, Laura K. |
title |
Influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy |
title_short |
Influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy |
title_full |
Influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy |
title_fullStr |
Influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy |
title_full_unstemmed |
Influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy |
title_sort |
influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy |
publisher |
Scholarship at UWindsor |
publishDate |
2012 |
url |
https://scholar.uwindsor.ca/glierpub/31 https://doi.org/10.1139/F2012-007 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/31 doi:10.1139/F2012-007 http://dx.doi.org/10.1139/F2012-007 |
op_doi |
https://doi.org/10.1139/F2012-007 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
69 |
container_issue |
4 |
container_start_page |
670 |
op_container_end_page |
680 |
_version_ |
1768384666874675200 |