Can Foraging Ecology Drive the Evolution of Body Size in a Diving Endotherm?
International audience Within a single animal species, different morphs can allow for differential exploitation of foraging niches between populations, while sexual size dimorphism can provide each sex with access to different resources. Despite being potentially important agents of evolution, resou...
Published in: | PLoS ONE |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Subjects: | |
Online Access: | https://hal.science/hal-00787590 https://hal.science/hal-00787590/document https://hal.science/hal-00787590/file/pone.0056297.pdf https://doi.org/10.1371/journal.pone.0056297 |
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Université de Nantes: HAL-UNIV-NANTES |
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language |
English |
topic |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology |
spellingShingle |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology Cook, Timothée R. Lescroel, Amélie Cherel, Yves Kato, Akiko Bost, Charles-André Can Foraging Ecology Drive the Evolution of Body Size in a Diving Endotherm? |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology |
description |
International audience Within a single animal species, different morphs can allow for differential exploitation of foraging niches between populations, while sexual size dimorphism can provide each sex with access to different resources. Despite being potentially important agents of evolution, resource polymorphisms, and the way they operate in wild populations, remain poorly understood. In this study, we examine how trophic factors can select for different body sizes between populations and sexes in a diving endotherm. Dive depth and duration are positively related to body size in diving birds and mammals, a relationship explained by a lower mass-specific metabolic rate and greater oxygen stores in larger individuals. Based on this allometry, we predict that selection for exploiting resources situated at different depths can drive the evolution of body size in species of diving endotherms at the population and sexual level. To test this prediction, we studied the foraging ecology of Blue-eyed Shags, a group of cormorants with male-biased sexual size dimorphism from across the Southern Ocean. We found that mean body mass and relative difference in body mass between sexes varied by up to 77% and 107% between neighbouring colonies, respectively. Birds from colonies with larger individuals dived deeper than birds from colonies with smaller individuals, when accounting for sex. In parallel, males dived further offshore and deeper than females and the sexual difference in dive depth reflected the level of sexual size dimorphism at each colony. We argue that body size in this group of birds is under intense selection for diving to depths of profitable benthic prey patches and that, locally, sexual niche divergence selection can exaggerate the sexual size dimorphism of Blue-eyed Shags initially set up by sexual selection. Our findings suggest that trophic resources can select for important geographic micro-variability in body size between populations and sexes. |
author2 |
Institute of African Ornithology University of Cape Town Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Département Ecologie, Physiologie et Ethologie (DEPE-IPHC) Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) National Institute of Polar Research Tokyo (NiPR) |
format |
Article in Journal/Newspaper |
author |
Cook, Timothée R. Lescroel, Amélie Cherel, Yves Kato, Akiko Bost, Charles-André |
author_facet |
Cook, Timothée R. Lescroel, Amélie Cherel, Yves Kato, Akiko Bost, Charles-André |
author_sort |
Cook, Timothée R. |
title |
Can Foraging Ecology Drive the Evolution of Body Size in a Diving Endotherm? |
title_short |
Can Foraging Ecology Drive the Evolution of Body Size in a Diving Endotherm? |
title_full |
Can Foraging Ecology Drive the Evolution of Body Size in a Diving Endotherm? |
title_fullStr |
Can Foraging Ecology Drive the Evolution of Body Size in a Diving Endotherm? |
title_full_unstemmed |
Can Foraging Ecology Drive the Evolution of Body Size in a Diving Endotherm? |
title_sort |
can foraging ecology drive the evolution of body size in a diving endotherm? |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-00787590 https://hal.science/hal-00787590/document https://hal.science/hal-00787590/file/pone.0056297.pdf https://doi.org/10.1371/journal.pone.0056297 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-00787590 PLoS ONE, 2013, 8 (2), pp.e56297. ⟨10.1371/journal.pone.0056297⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0056297 hal-00787590 https://hal.science/hal-00787590 https://hal.science/hal-00787590/document https://hal.science/hal-00787590/file/pone.0056297.pdf doi:10.1371/journal.pone.0056297 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0056297 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
2 |
container_start_page |
e56297 |
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1766207645835853824 |
spelling |
ftunivnantes:oai:HAL:hal-00787590v1 2023-05-15T18:25:55+02:00 Can Foraging Ecology Drive the Evolution of Body Size in a Diving Endotherm? Cook, Timothée R. Lescroel, Amélie Cherel, Yves Kato, Akiko Bost, Charles-André Institute of African Ornithology University of Cape Town Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Département Ecologie, Physiologie et Ethologie (DEPE-IPHC) Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) National Institute of Polar Research Tokyo (NiPR) 2013 https://hal.science/hal-00787590 https://hal.science/hal-00787590/document https://hal.science/hal-00787590/file/pone.0056297.pdf https://doi.org/10.1371/journal.pone.0056297 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0056297 hal-00787590 https://hal.science/hal-00787590 https://hal.science/hal-00787590/document https://hal.science/hal-00787590/file/pone.0056297.pdf doi:10.1371/journal.pone.0056297 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-00787590 PLoS ONE, 2013, 8 (2), pp.e56297. ⟨10.1371/journal.pone.0056297⟩ [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology info:eu-repo/semantics/article Journal articles 2013 ftunivnantes https://doi.org/10.1371/journal.pone.0056297 2023-03-08T03:01:18Z International audience Within a single animal species, different morphs can allow for differential exploitation of foraging niches between populations, while sexual size dimorphism can provide each sex with access to different resources. Despite being potentially important agents of evolution, resource polymorphisms, and the way they operate in wild populations, remain poorly understood. In this study, we examine how trophic factors can select for different body sizes between populations and sexes in a diving endotherm. Dive depth and duration are positively related to body size in diving birds and mammals, a relationship explained by a lower mass-specific metabolic rate and greater oxygen stores in larger individuals. Based on this allometry, we predict that selection for exploiting resources situated at different depths can drive the evolution of body size in species of diving endotherms at the population and sexual level. To test this prediction, we studied the foraging ecology of Blue-eyed Shags, a group of cormorants with male-biased sexual size dimorphism from across the Southern Ocean. We found that mean body mass and relative difference in body mass between sexes varied by up to 77% and 107% between neighbouring colonies, respectively. Birds from colonies with larger individuals dived deeper than birds from colonies with smaller individuals, when accounting for sex. In parallel, males dived further offshore and deeper than females and the sexual difference in dive depth reflected the level of sexual size dimorphism at each colony. We argue that body size in this group of birds is under intense selection for diving to depths of profitable benthic prey patches and that, locally, sexual niche divergence selection can exaggerate the sexual size dimorphism of Blue-eyed Shags initially set up by sexual selection. Our findings suggest that trophic resources can select for important geographic micro-variability in body size between populations and sexes. Article in Journal/Newspaper Southern Ocean Université de Nantes: HAL-UNIV-NANTES Southern Ocean PLoS ONE 8 2 e56297 |