Offspring sex ratio increases with male reproductive success in the polygynous southern elephant seals
In polygynous species, most dominant males sire a disproportionate number of offspring and dominance rank is assumed to be age dependent. Yet, extreme inter-male competition and high early male mortality prevent most males from reaching a social status that could guaranty a high reproductive success...
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ftccsdartic:oai:HAL:hal-04172327v1 2024-02-27T08:40:11+00:00 Offspring sex ratio increases with male reproductive success in the polygynous southern elephant seals Allegue, Hassen Guinet, Christophe Patrick, Samantha Ribout, Cécile Bichet, Coraline Lepais, Olivier Réale, Denis Université du Québec à Montréal = University of Québec in Montréal (UQAM) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) University of Liverpool Biodiversité, Gènes & Communautés (BioGeCo) Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) 2023-07-27 https://hal.science/hal-04172327 https://doi.org/10.32942/X21S30 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.32942/X21S30 hal-04172327 https://hal.science/hal-04172327 doi:10.32942/X21S30 https://hal.science/hal-04172327 2023 Offspring sex ratio polygyny reproductive success Mirounga leonina [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] info:eu-repo/semantics/preprint Preprints, Working Papers, . 2023 ftccsdartic https://doi.org/10.32942/X21S30 2024-01-28T00:37:59Z In polygynous species, most dominant males sire a disproportionate number of offspring and dominance rank is assumed to be age dependent. Yet, extreme inter-male competition and high early male mortality prevent most males from reaching a social status that could guaranty a high reproductive success. Alternative reproductive tactics may have evolved to maximize male reproductive success despite a low social rank. One of them, offspring sex-ratio adjustment, may allow males to produce more offspring of the sex that will provide a higher fitness. If traits influencing dominance in males are heritable and if the average fitness of subordinate males is lower than the average fitness of females, we predict that the probability of producing a son would increase with a male reproductive success as its sons would be more likely to become dominant. We tested this hypothesis on southern elephant seals breeding on the Kerguelen Archipelago. Using 530 pups sired by 52 males, we found that the probability of siring a son increases with a male reproductive success. Out finding provide new insights on sex ratio variation can be an important tool in managing population dynamics and structure, which has direct implications on wildlife conservation. Report Elephant Seals Mirounga leonina Southern Elephant Seals Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Kerguelen |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Offspring sex ratio polygyny reproductive success Mirounga leonina [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] |
spellingShingle |
Offspring sex ratio polygyny reproductive success Mirounga leonina [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] Allegue, Hassen Guinet, Christophe Patrick, Samantha Ribout, Cécile Bichet, Coraline Lepais, Olivier Réale, Denis Offspring sex ratio increases with male reproductive success in the polygynous southern elephant seals |
topic_facet |
Offspring sex ratio polygyny reproductive success Mirounga leonina [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE] |
description |
In polygynous species, most dominant males sire a disproportionate number of offspring and dominance rank is assumed to be age dependent. Yet, extreme inter-male competition and high early male mortality prevent most males from reaching a social status that could guaranty a high reproductive success. Alternative reproductive tactics may have evolved to maximize male reproductive success despite a low social rank. One of them, offspring sex-ratio adjustment, may allow males to produce more offspring of the sex that will provide a higher fitness. If traits influencing dominance in males are heritable and if the average fitness of subordinate males is lower than the average fitness of females, we predict that the probability of producing a son would increase with a male reproductive success as its sons would be more likely to become dominant. We tested this hypothesis on southern elephant seals breeding on the Kerguelen Archipelago. Using 530 pups sired by 52 males, we found that the probability of siring a son increases with a male reproductive success. Out finding provide new insights on sex ratio variation can be an important tool in managing population dynamics and structure, which has direct implications on wildlife conservation. |
author2 |
Université du Québec à Montréal = University of Québec in Montréal (UQAM) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) University of Liverpool Biodiversité, Gènes & Communautés (BioGeCo) Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
format |
Report |
author |
Allegue, Hassen Guinet, Christophe Patrick, Samantha Ribout, Cécile Bichet, Coraline Lepais, Olivier Réale, Denis |
author_facet |
Allegue, Hassen Guinet, Christophe Patrick, Samantha Ribout, Cécile Bichet, Coraline Lepais, Olivier Réale, Denis |
author_sort |
Allegue, Hassen |
title |
Offspring sex ratio increases with male reproductive success in the polygynous southern elephant seals |
title_short |
Offspring sex ratio increases with male reproductive success in the polygynous southern elephant seals |
title_full |
Offspring sex ratio increases with male reproductive success in the polygynous southern elephant seals |
title_fullStr |
Offspring sex ratio increases with male reproductive success in the polygynous southern elephant seals |
title_full_unstemmed |
Offspring sex ratio increases with male reproductive success in the polygynous southern elephant seals |
title_sort |
offspring sex ratio increases with male reproductive success in the polygynous southern elephant seals |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04172327 https://doi.org/10.32942/X21S30 |
geographic |
Kerguelen |
geographic_facet |
Kerguelen |
genre |
Elephant Seals Mirounga leonina Southern Elephant Seals |
genre_facet |
Elephant Seals Mirounga leonina Southern Elephant Seals |
op_source |
https://hal.science/hal-04172327 2023 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.32942/X21S30 hal-04172327 https://hal.science/hal-04172327 doi:10.32942/X21S30 |
op_doi |
https://doi.org/10.32942/X21S30 |
_version_ |
1792047285954150400 |