Individual heterogeneity in life‐history trade‐offs with age at first reproduction in capital breeding elephant seals
International audience ecruitment age plays a key role in life-history evolution. Because individuals allocate limited resources among competing life-history functions, theory predicts trade-offs between current reproduction and future growth, survival and/or reproduction. Reproductive costs tend to...
Published in: | Population Ecology |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2019
|
Subjects: | |
Online Access: | https://hal.science/hal-02177472 https://hal.science/hal-02177472/document https://hal.science/hal-02177472/file/pope12015.pdf https://doi.org/10.1002/1438-390X.12015 |
id |
ftinstagro:oai:HAL:hal-02177472v1 |
---|---|
record_format |
openpolar |
spelling |
ftinstagro:oai:HAL:hal-02177472v1 2024-06-23T07:52:29+00:00 Individual heterogeneity in life‐history trade‐offs with age at first reproduction in capital breeding elephant seals Oosthuizen, W. Chris Postma, Martin Altwegg, Res Nevoux, Marie Pradel, Roger Bester, Marthan, N. Nico de Bruyn, P, J University of Pretoria South Africa University of Cape Town, Dept Stat Sci, Ctr Stat Ecol Environm & Conservat, Rondebosch Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST 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) 2019 https://hal.science/hal-02177472 https://hal.science/hal-02177472/document https://hal.science/hal-02177472/file/pope12015.pdf https://doi.org/10.1002/1438-390X.12015 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1002/1438-390X.12015 hal-02177472 https://hal.science/hal-02177472 https://hal.science/hal-02177472/document https://hal.science/hal-02177472/file/pope12015.pdf doi:10.1002/1438-390X.12015 WOS: 000491428300006 info:eu-repo/semantics/OpenAccess ISSN: 1438-3896 Population Ecology https://hal.science/hal-02177472 Population Ecology, 2019, 61 (4), pp.421-435. ⟨10.1002/1438-390X.12015⟩ cost of reproduction hidden heterogeneity individual quality mixture models recruitment age [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2019 ftinstagro https://doi.org/10.1002/1438-390X.12015 2024-05-29T23:51:14Z International audience ecruitment age plays a key role in life-history evolution. Because individuals allocate limited resources among competing life-history functions, theory predicts trade-offs between current reproduction and future growth, survival and/or reproduction. Reproductive costs tend to vary with recruitment age, but may also be overridden by fixed individual differences leading to persistent demographic heterogeneity and positive covariation among demographic traits at the population level. We tested for evidence of intra- and inter-generational trade-offs and individual heterogeneity relating to age at first reproduction using three decades of detailed individual life-history data of 6,439 capital breeding female southern elephant seals. Contrary to the predictions from trade-off hypotheses, we found that recruitment at an early age was associated with higher population level survival and subsequent breeding probabilities. Nonetheless, a survival cost of first reproduction was evident at the population level, as first-time breeders always had lower survival probabilities than prebreeders and experienced breeders of the same age. However, models accounting for hidden persistent demographic heterogeneity revealed that the trade-off between first reproduction and survival was only expressed in "low quality" individuals, comprising 35% of the population. The short-term somatic costs associated with breeding at an early age had no effect on the ability of females to allocate resources to offspring in the next breeding season. Our results provide strong evidence for individual heterogeneity in the life-history trajectories of female elephant seals. By explicitly modeling hidden persistent demographic heterogeneity we show that individual heterogeneity governs the expression of trade-offs with first reproduction in elephant seals. Article in Journal/Newspaper Elephant Seals Southern Elephant Seals Portail HAL Institut Agro Population Ecology 61 4 421 435 |
institution |
Open Polar |
collection |
Portail HAL Institut Agro |
op_collection_id |
ftinstagro |
language |
English |
topic |
cost of reproduction hidden heterogeneity individual quality mixture models recruitment age [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
cost of reproduction hidden heterogeneity individual quality mixture models recruitment age [SDE.BE]Environmental Sciences/Biodiversity and Ecology Oosthuizen, W. Chris Postma, Martin Altwegg, Res Nevoux, Marie Pradel, Roger Bester, Marthan, N. Nico de Bruyn, P, J Individual heterogeneity in life‐history trade‐offs with age at first reproduction in capital breeding elephant seals |
topic_facet |
cost of reproduction hidden heterogeneity individual quality mixture models recruitment age [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience ecruitment age plays a key role in life-history evolution. Because individuals allocate limited resources among competing life-history functions, theory predicts trade-offs between current reproduction and future growth, survival and/or reproduction. Reproductive costs tend to vary with recruitment age, but may also be overridden by fixed individual differences leading to persistent demographic heterogeneity and positive covariation among demographic traits at the population level. We tested for evidence of intra- and inter-generational trade-offs and individual heterogeneity relating to age at first reproduction using three decades of detailed individual life-history data of 6,439 capital breeding female southern elephant seals. Contrary to the predictions from trade-off hypotheses, we found that recruitment at an early age was associated with higher population level survival and subsequent breeding probabilities. Nonetheless, a survival cost of first reproduction was evident at the population level, as first-time breeders always had lower survival probabilities than prebreeders and experienced breeders of the same age. However, models accounting for hidden persistent demographic heterogeneity revealed that the trade-off between first reproduction and survival was only expressed in "low quality" individuals, comprising 35% of the population. The short-term somatic costs associated with breeding at an early age had no effect on the ability of females to allocate resources to offspring in the next breeding season. Our results provide strong evidence for individual heterogeneity in the life-history trajectories of female elephant seals. By explicitly modeling hidden persistent demographic heterogeneity we show that individual heterogeneity governs the expression of trade-offs with first reproduction in elephant seals. |
author2 |
University of Pretoria South Africa University of Cape Town, Dept Stat Sci, Ctr Stat Ecol Environm & Conservat, Rondebosch Écologie et santé des écosystèmes (ESE) Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST 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) |
format |
Article in Journal/Newspaper |
author |
Oosthuizen, W. Chris Postma, Martin Altwegg, Res Nevoux, Marie Pradel, Roger Bester, Marthan, N. Nico de Bruyn, P, J |
author_facet |
Oosthuizen, W. Chris Postma, Martin Altwegg, Res Nevoux, Marie Pradel, Roger Bester, Marthan, N. Nico de Bruyn, P, J |
author_sort |
Oosthuizen, W. Chris |
title |
Individual heterogeneity in life‐history trade‐offs with age at first reproduction in capital breeding elephant seals |
title_short |
Individual heterogeneity in life‐history trade‐offs with age at first reproduction in capital breeding elephant seals |
title_full |
Individual heterogeneity in life‐history trade‐offs with age at first reproduction in capital breeding elephant seals |
title_fullStr |
Individual heterogeneity in life‐history trade‐offs with age at first reproduction in capital breeding elephant seals |
title_full_unstemmed |
Individual heterogeneity in life‐history trade‐offs with age at first reproduction in capital breeding elephant seals |
title_sort |
individual heterogeneity in life‐history trade‐offs with age at first reproduction in capital breeding elephant seals |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02177472 https://hal.science/hal-02177472/document https://hal.science/hal-02177472/file/pope12015.pdf https://doi.org/10.1002/1438-390X.12015 |
genre |
Elephant Seals Southern Elephant Seals |
genre_facet |
Elephant Seals Southern Elephant Seals |
op_source |
ISSN: 1438-3896 Population Ecology https://hal.science/hal-02177472 Population Ecology, 2019, 61 (4), pp.421-435. ⟨10.1002/1438-390X.12015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/1438-390X.12015 hal-02177472 https://hal.science/hal-02177472 https://hal.science/hal-02177472/document https://hal.science/hal-02177472/file/pope12015.pdf doi:10.1002/1438-390X.12015 WOS: 000491428300006 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/1438-390X.12015 |
container_title |
Population Ecology |
container_volume |
61 |
container_issue |
4 |
container_start_page |
421 |
op_container_end_page |
435 |
_version_ |
1802643793209458688 |