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Evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (Salvelinus confluentus) population

The coexistence of distinct alternative mating strategies (AMS) is often explained by mechanisms involving trade‐offs between reproductive traits and lifetime fitness; yet their relative importance remains poorly understood. Here, we used an established individual‐based, spatially explicit model to...

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Autores principales: Bernos, Thaïs A., Chang, Sarah L., Giglio, Rachael M., Davenport, Kaeli, Fisher, Jeff, Lowery, Erin, Bearlin, Andrew, Simmons, Ryan, Fortin, Marie‐Josée, Day, Casey C., Landguth, Erin L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10082177/
https://www.ncbi.nlm.nih.gov/pubmed/37038529
http://dx.doi.org/10.1002/ece3.9965
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author Bernos, Thaïs A.
Chang, Sarah L.
Giglio, Rachael M.
Davenport, Kaeli
Fisher, Jeff
Lowery, Erin
Bearlin, Andrew
Simmons, Ryan
Fortin, Marie‐Josée
Day, Casey C.
Landguth, Erin L.
author_facet Bernos, Thaïs A.
Chang, Sarah L.
Giglio, Rachael M.
Davenport, Kaeli
Fisher, Jeff
Lowery, Erin
Bearlin, Andrew
Simmons, Ryan
Fortin, Marie‐Josée
Day, Casey C.
Landguth, Erin L.
author_sort Bernos, Thaïs A.
collection PubMed
description The coexistence of distinct alternative mating strategies (AMS) is often explained by mechanisms involving trade‐offs between reproductive traits and lifetime fitness; yet their relative importance remains poorly understood. Here, we used an established individual‐based, spatially explicit model to simulate bull trout (Salvelinus confluentus) in the Skagit River (Washington, USA) and investigated the influence of female mating preference, sneaker‐specific mortality, and variation in age‐at‐maturity on AMS persistence using global sensitivity analyses and boosted regression trees. We assumed that two genetically fixed AMS coexisted within the population: sneaker males (characterized by younger age‐at‐maturity, greater AMS‐specific mortality, and lower reproductive fitness) and territorial males. After 300 years, variation in relative sneaker success in the system was explained by sneaker males' reproductive fitness (72%) and, to a lesser extent, the length of their reproductive lifespan (21%) and their proportion in the initial population (8%). However, under a wide range of parameter values, our simulated scenarios predicted the extinction of territorial males or their persistence in small, declining populations. Although these results do not resolve the coexistence of AMS in salmonids, they reinforce the importance of mechanisms reducing sneaker's lifetime reproductive success in favoring AMS coexistence within salmonid populations but also limit the prediction that, without any other selective mechanisms at play, strong female preference for mating with territorial males and differences in reproductive lifespan allow the stable coexistence of distinct AMS.
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spelling pubmed-100821772023-04-09 Evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (Salvelinus confluentus) population Bernos, Thaïs A. Chang, Sarah L. Giglio, Rachael M. Davenport, Kaeli Fisher, Jeff Lowery, Erin Bearlin, Andrew Simmons, Ryan Fortin, Marie‐Josée Day, Casey C. Landguth, Erin L. Ecol Evol Research Articles The coexistence of distinct alternative mating strategies (AMS) is often explained by mechanisms involving trade‐offs between reproductive traits and lifetime fitness; yet their relative importance remains poorly understood. Here, we used an established individual‐based, spatially explicit model to simulate bull trout (Salvelinus confluentus) in the Skagit River (Washington, USA) and investigated the influence of female mating preference, sneaker‐specific mortality, and variation in age‐at‐maturity on AMS persistence using global sensitivity analyses and boosted regression trees. We assumed that two genetically fixed AMS coexisted within the population: sneaker males (characterized by younger age‐at‐maturity, greater AMS‐specific mortality, and lower reproductive fitness) and territorial males. After 300 years, variation in relative sneaker success in the system was explained by sneaker males' reproductive fitness (72%) and, to a lesser extent, the length of their reproductive lifespan (21%) and their proportion in the initial population (8%). However, under a wide range of parameter values, our simulated scenarios predicted the extinction of territorial males or their persistence in small, declining populations. Although these results do not resolve the coexistence of AMS in salmonids, they reinforce the importance of mechanisms reducing sneaker's lifetime reproductive success in favoring AMS coexistence within salmonid populations but also limit the prediction that, without any other selective mechanisms at play, strong female preference for mating with territorial males and differences in reproductive lifespan allow the stable coexistence of distinct AMS. John Wiley and Sons Inc. 2023-04-07 /pmc/articles/PMC10082177/ /pubmed/37038529 http://dx.doi.org/10.1002/ece3.9965 Text en © 2023 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Bernos, Thaïs A.
Chang, Sarah L.
Giglio, Rachael M.
Davenport, Kaeli
Fisher, Jeff
Lowery, Erin
Bearlin, Andrew
Simmons, Ryan
Fortin, Marie‐Josée
Day, Casey C.
Landguth, Erin L.
Evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (Salvelinus confluentus) population
title Evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (Salvelinus confluentus) population
title_full Evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (Salvelinus confluentus) population
title_fullStr Evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (Salvelinus confluentus) population
title_full_unstemmed Evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (Salvelinus confluentus) population
title_short Evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (Salvelinus confluentus) population
title_sort evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (salvelinus confluentus) population
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10082177/
https://www.ncbi.nlm.nih.gov/pubmed/37038529
http://dx.doi.org/10.1002/ece3.9965
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