Fine‐scale temporal adaptation within a salmonid population: mechanism and consequences
Abstract We demonstrate a clear example of local adaptation of seasonal timing of spawning and embryo development. The consequence is a population of pink salmon that is segmented into spawning groups that use the same limited habitat. We synthesize published observations with results of new analyse...
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crwiley:10.1111/mec.12400 2024-05-19T07:47:24+00:00 Fine‐scale temporal adaptation within a salmonid population: mechanism and consequences Gharrett, Anthony J. Joyce, John Smoker, William W. 2013 http://dx.doi.org/10.1111/mec.12400 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12400 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12400 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 Molecular Ecology volume 22, issue 17, page 4457-4469 ISSN 0962-1083 1365-294X Genetics Ecology, Evolution, Behavior and Systematics journal-article 2013 crwiley https://doi.org/10.1111/mec.12400 2024-04-22T07:34:11Z Abstract We demonstrate a clear example of local adaptation of seasonal timing of spawning and embryo development. The consequence is a population of pink salmon that is segmented into spawning groups that use the same limited habitat. We synthesize published observations with results of new analyses to demonstrate that genetic variation of these traits results in survival differentials related to that variation, and that density‐dependent embryo mortality and seasonally variable juvenile mortality are a mechanism of selection. Most examples of local adaptation in natural systems depend on observed correlations between environments and fitness traits, but do not fully demonstrate local adaptation: that the trait is genetically determined, exhibits different fitness in common environments or across different environments, and its variation is mechanistically connected to fitness differences. The geographic or temporal scales of local adaptation often remain obscure. Here, we show that heritable, fine‐scale differences of timing of reproductive migration in a pink salmon ( O ncorhynchus gorbuscha ) resulted in temporal structure that persisted several generations; the differences enable a density‐dependent population to pack more spawners into limited spawning habitat, that is, enhance its fitness. A balanced trade‐off of survivals results because embryos from early‐migrating fish have a lower freshwater survival (harsh early physical conditions and disturbance by late spawners), but emigrant fry from late‐migrating fish have lower marine survivals (timing of their vernal emergence into the estuarine environment). Such fine‐scale local adaptations increase the genetic portfolio of the populations and may provide a buffer against the impacts of climate change. Article in Journal/Newspaper Pink salmon Wiley Online Library Molecular Ecology 22 17 4457 4469 |
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English |
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Genetics Ecology, Evolution, Behavior and Systematics |
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Genetics Ecology, Evolution, Behavior and Systematics Gharrett, Anthony J. Joyce, John Smoker, William W. Fine‐scale temporal adaptation within a salmonid population: mechanism and consequences |
topic_facet |
Genetics Ecology, Evolution, Behavior and Systematics |
description |
Abstract We demonstrate a clear example of local adaptation of seasonal timing of spawning and embryo development. The consequence is a population of pink salmon that is segmented into spawning groups that use the same limited habitat. We synthesize published observations with results of new analyses to demonstrate that genetic variation of these traits results in survival differentials related to that variation, and that density‐dependent embryo mortality and seasonally variable juvenile mortality are a mechanism of selection. Most examples of local adaptation in natural systems depend on observed correlations between environments and fitness traits, but do not fully demonstrate local adaptation: that the trait is genetically determined, exhibits different fitness in common environments or across different environments, and its variation is mechanistically connected to fitness differences. The geographic or temporal scales of local adaptation often remain obscure. Here, we show that heritable, fine‐scale differences of timing of reproductive migration in a pink salmon ( O ncorhynchus gorbuscha ) resulted in temporal structure that persisted several generations; the differences enable a density‐dependent population to pack more spawners into limited spawning habitat, that is, enhance its fitness. A balanced trade‐off of survivals results because embryos from early‐migrating fish have a lower freshwater survival (harsh early physical conditions and disturbance by late spawners), but emigrant fry from late‐migrating fish have lower marine survivals (timing of their vernal emergence into the estuarine environment). Such fine‐scale local adaptations increase the genetic portfolio of the populations and may provide a buffer against the impacts of climate change. |
format |
Article in Journal/Newspaper |
author |
Gharrett, Anthony J. Joyce, John Smoker, William W. |
author_facet |
Gharrett, Anthony J. Joyce, John Smoker, William W. |
author_sort |
Gharrett, Anthony J. |
title |
Fine‐scale temporal adaptation within a salmonid population: mechanism and consequences |
title_short |
Fine‐scale temporal adaptation within a salmonid population: mechanism and consequences |
title_full |
Fine‐scale temporal adaptation within a salmonid population: mechanism and consequences |
title_fullStr |
Fine‐scale temporal adaptation within a salmonid population: mechanism and consequences |
title_full_unstemmed |
Fine‐scale temporal adaptation within a salmonid population: mechanism and consequences |
title_sort |
fine‐scale temporal adaptation within a salmonid population: mechanism and consequences |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1111/mec.12400 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12400 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12400 |
genre |
Pink salmon |
genre_facet |
Pink salmon |
op_source |
Molecular Ecology volume 22, issue 17, page 4457-4469 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 |
op_doi |
https://doi.org/10.1111/mec.12400 |
container_title |
Molecular Ecology |
container_volume |
22 |
container_issue |
17 |
container_start_page |
4457 |
op_container_end_page |
4469 |
_version_ |
1799487810338553856 |