Mating success and body condition not related to foraging specializations in male fur seals
International audience Individual specialization is widespread among wild populations. While its fitness consequences are central in predicting the ecological and evolutionary trajectories of populations, they remain poorly understood. Long-term individual foraging specializations occur in male Anta...
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ftccsdartic:oai:HAL:hal-01349347v1 2023-05-15T13:31:46+02:00 Mating success and body condition not related to foraging specializations in male fur seals Kernaleguen, Laëtitia Cherel, Yves Guinet, Christophe Arnould, John Py School of Life and Environmental Sciences Deakin University Burwood Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) 2016 https://hal.archives-ouvertes.fr/hal-01349347 https://doi.org/10.1098/rsos.160143 en eng HAL CCSD The Royal Society info:eu-repo/semantics/altIdentifier/doi/10.1098/rsos.160143 hal-01349347 https://hal.archives-ouvertes.fr/hal-01349347 doi:10.1098/rsos.160143 ISSN: 2054-5703 Royal Society Open Science https://hal.archives-ouvertes.fr/hal-01349347 Royal Society Open Science, The Royal Society, 2016, ⟨10.1098/rsos.160143⟩ stable isotopes : territorial males fitness payoff reproductive success Arctocephalus diet [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1098/rsos.160143 2021-11-07T04:16:16Z International audience Individual specialization is widespread among wild populations. While its fitness consequences are central in predicting the ecological and evolutionary trajectories of populations, they remain poorly understood. Long-term individual foraging specializations occur in male Antarctic (Arctocephalus gazella) and Australian (A. pusillus doriferus) fur seals. Strong selective pressure is expected in these highly dimorphic and polygynous species, raising the question of the fitness payoffs associated with different foraging strategies. We investigated the relationship between individual isotopic niche (a proxy of foraging specialization), body size and condition, and an index of reproductive success (harem size) in territorial males. Individuals varied greatly in their skin and fur isotopic values reflecting a range of foraging strategies within the two populations. However, in both species, isotopic niche was not correlated to body size, condition or mating success (R2/ρ < 0.06). Furthermore, no foraging niche was predominant in either species, which would have indicated a substantial long-term fitness benefit of a particular strategy via a higher survival rate. These results suggest that the fitness consequences of a foraging strategy depend not only on the quality of prey and feeding habitat but also on an individual's hunting efficiency and skills. Article in Journal/Newspaper Antarc* Antarctic Arctocephalus gazella Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Royal Society Open Science 3 7 160143 |
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 |
stable isotopes : territorial males fitness payoff reproductive success Arctocephalus diet [SDE]Environmental Sciences |
spellingShingle |
stable isotopes : territorial males fitness payoff reproductive success Arctocephalus diet [SDE]Environmental Sciences Kernaleguen, Laëtitia Cherel, Yves Guinet, Christophe Arnould, John Py Mating success and body condition not related to foraging specializations in male fur seals |
topic_facet |
stable isotopes : territorial males fitness payoff reproductive success Arctocephalus diet [SDE]Environmental Sciences |
description |
International audience Individual specialization is widespread among wild populations. While its fitness consequences are central in predicting the ecological and evolutionary trajectories of populations, they remain poorly understood. Long-term individual foraging specializations occur in male Antarctic (Arctocephalus gazella) and Australian (A. pusillus doriferus) fur seals. Strong selective pressure is expected in these highly dimorphic and polygynous species, raising the question of the fitness payoffs associated with different foraging strategies. We investigated the relationship between individual isotopic niche (a proxy of foraging specialization), body size and condition, and an index of reproductive success (harem size) in territorial males. Individuals varied greatly in their skin and fur isotopic values reflecting a range of foraging strategies within the two populations. However, in both species, isotopic niche was not correlated to body size, condition or mating success (R2/ρ < 0.06). Furthermore, no foraging niche was predominant in either species, which would have indicated a substantial long-term fitness benefit of a particular strategy via a higher survival rate. These results suggest that the fitness consequences of a foraging strategy depend not only on the quality of prey and feeding habitat but also on an individual's hunting efficiency and skills. |
author2 |
School of Life and Environmental Sciences Deakin University Burwood Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
format |
Article in Journal/Newspaper |
author |
Kernaleguen, Laëtitia Cherel, Yves Guinet, Christophe Arnould, John Py |
author_facet |
Kernaleguen, Laëtitia Cherel, Yves Guinet, Christophe Arnould, John Py |
author_sort |
Kernaleguen, Laëtitia |
title |
Mating success and body condition not related to foraging specializations in male fur seals |
title_short |
Mating success and body condition not related to foraging specializations in male fur seals |
title_full |
Mating success and body condition not related to foraging specializations in male fur seals |
title_fullStr |
Mating success and body condition not related to foraging specializations in male fur seals |
title_full_unstemmed |
Mating success and body condition not related to foraging specializations in male fur seals |
title_sort |
mating success and body condition not related to foraging specializations in male fur seals |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-01349347 https://doi.org/10.1098/rsos.160143 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Arctocephalus gazella |
op_source |
ISSN: 2054-5703 Royal Society Open Science https://hal.archives-ouvertes.fr/hal-01349347 Royal Society Open Science, The Royal Society, 2016, ⟨10.1098/rsos.160143⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1098/rsos.160143 hal-01349347 https://hal.archives-ouvertes.fr/hal-01349347 doi:10.1098/rsos.160143 |
op_doi |
https://doi.org/10.1098/rsos.160143 |
container_title |
Royal Society Open Science |
container_volume |
3 |
container_issue |
7 |
container_start_page |
160143 |
_version_ |
1766020814690320384 |