Genetic variation in threshold reaction norms for alternative reproductive tactics in male Atlantic salmon, Salmo salar
Alternative reproductive tactics may be a product of adaptive phenotypic plasticity, such that discontinuous variation in life history depends on both the genotype and the environment. Phenotypes that fall below a genetically determined threshold adopt one tactic, while those exceeding the threshold...
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crroyalsociety:10.1098/rspb.2008.0251 2024-06-02T08:03:30+00:00 Genetic variation in threshold reaction norms for alternative reproductive tactics in male Atlantic salmon, Salmo salar Piché, Jacinthe Hutchings, Jeffrey A Blanchard, Wade 2008 http://dx.doi.org/10.1098/rspb.2008.0251 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2008.0251 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2008.0251 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 275, issue 1642, page 1571-1575 ISSN 0962-8452 1471-2954 journal-article 2008 crroyalsociety https://doi.org/10.1098/rspb.2008.0251 2024-05-07T14:16:36Z Alternative reproductive tactics may be a product of adaptive phenotypic plasticity, such that discontinuous variation in life history depends on both the genotype and the environment. Phenotypes that fall below a genetically determined threshold adopt one tactic, while those exceeding the threshold adopt the alternative tactic. We report evidence of genetic variability in maturation thresholds for male Atlantic salmon ( Salmo salar ) that mature either as large (more than 1 kg) anadromous males or as small (10–150 g) parr. Using a common-garden experimental protocol, we find that the growth rate at which the sneaker parr phenotype is expressed differs among pure- and mixed-population crosses. Maturation thresholds of hybrids were intermediate to those of pure crosses, consistent with the hypothesis that the life-history switch points are heritable. Our work provides evidence, for a vertebrate, that thresholds for alternative reproductive tactics differ genetically among populations and can be modelled as discontinuous reaction norms for age and size at maturity. Article in Journal/Newspaper Atlantic salmon Salmo salar The Royal Society Proceedings of the Royal Society B: Biological Sciences 275 1642 1571 1575 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Alternative reproductive tactics may be a product of adaptive phenotypic plasticity, such that discontinuous variation in life history depends on both the genotype and the environment. Phenotypes that fall below a genetically determined threshold adopt one tactic, while those exceeding the threshold adopt the alternative tactic. We report evidence of genetic variability in maturation thresholds for male Atlantic salmon ( Salmo salar ) that mature either as large (more than 1 kg) anadromous males or as small (10–150 g) parr. Using a common-garden experimental protocol, we find that the growth rate at which the sneaker parr phenotype is expressed differs among pure- and mixed-population crosses. Maturation thresholds of hybrids were intermediate to those of pure crosses, consistent with the hypothesis that the life-history switch points are heritable. Our work provides evidence, for a vertebrate, that thresholds for alternative reproductive tactics differ genetically among populations and can be modelled as discontinuous reaction norms for age and size at maturity. |
format |
Article in Journal/Newspaper |
author |
Piché, Jacinthe Hutchings, Jeffrey A Blanchard, Wade |
spellingShingle |
Piché, Jacinthe Hutchings, Jeffrey A Blanchard, Wade Genetic variation in threshold reaction norms for alternative reproductive tactics in male Atlantic salmon, Salmo salar |
author_facet |
Piché, Jacinthe Hutchings, Jeffrey A Blanchard, Wade |
author_sort |
Piché, Jacinthe |
title |
Genetic variation in threshold reaction norms for alternative reproductive tactics in male Atlantic salmon, Salmo salar |
title_short |
Genetic variation in threshold reaction norms for alternative reproductive tactics in male Atlantic salmon, Salmo salar |
title_full |
Genetic variation in threshold reaction norms for alternative reproductive tactics in male Atlantic salmon, Salmo salar |
title_fullStr |
Genetic variation in threshold reaction norms for alternative reproductive tactics in male Atlantic salmon, Salmo salar |
title_full_unstemmed |
Genetic variation in threshold reaction norms for alternative reproductive tactics in male Atlantic salmon, Salmo salar |
title_sort |
genetic variation in threshold reaction norms for alternative reproductive tactics in male atlantic salmon, salmo salar |
publisher |
The Royal Society |
publishDate |
2008 |
url |
http://dx.doi.org/10.1098/rspb.2008.0251 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2008.0251 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2008.0251 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 275, issue 1642, page 1571-1575 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.2008.0251 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
275 |
container_issue |
1642 |
container_start_page |
1571 |
op_container_end_page |
1575 |
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1800748051730530304 |