AustralieFrV1, PubMed, Corpus, bibRecord, 003795

Age-specific cost of first reproduction in female southern elephant seals.

Identifieur interne : 003795 ( PubMed/Corpus ); précédent : 003794; suivant : 003796

Age-specific cost of first reproduction in female southern elephant seals.

Auteurs : Marine Desprez ; Robert Harcourt ; Mark A. Hindell ; Sarah Cubaynes ; Olivier Gimenez ; Clive R. Mcmahon

Source :

Biology letters [ 1744-957X ] ; 2014.

RBID : pubmed:24872464

English descriptors

KwdEn :
- Age Factors, Animals, Female, Mortality, Reproduction (physiology), Seals, Earless (physiology).
MESH :
- physiology : Reproduction, Seals, Earless.
- Age Factors, Animals, Female, Mortality.

Abstract

When to commence breeding is a crucial life-history decision that may be the most important determinant of an individual's lifetime reproductive output and can have major consequences on population dynamics. The age at which individuals first reproduce is an important factor influencing the intensity of potential costs (e.g. reduced survival) involved in the first breeding event. However, quantifying age-related variation in the cost of first reproduction in wild animals remains challenging because of the difficulty in reliably recording the first breeding event. Here, using a multi-event capture-recapture model that accounts for both imperfect detection and uncertainty in the breeding status on an 18-year dataset involving 6637 individuals, we estimated age and state-specific survival of female elephant seals (Mirounga leonina) in the declining Macquarie Island population. We detected a clear cost of first reproduction on survival. This cost was higher for both younger first-time breeders and older first-time breeders compared with females recruiting at age four, the overall mean age at first reproduction. Neither earlier primiparity nor delaying primiparity appear to confer any evolutionary advantage, rather the optimal strategy seems to be to start breeding at a single age, 4 years.

DOI: 10.1098/rsbl.2014.0264
PubMed: 24872464

Links to Exploration step

pubmed:24872464

Le document en format XML

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<author><name sortKey="Desprez, Marine" sort="Desprez, Marine" uniqKey="Desprez M" first="Marine" last="Desprez">Marine Desprez</name>
<affiliation><nlm:affiliation>Marine Predator Research Group, Department of Biological Sciences, Macquarie University, North Ryde, New South Wales 2109, Australia marine.desprez@mq.edu.au.</nlm:affiliation>
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<author><name sortKey="Harcourt, Robert" sort="Harcourt, Robert" uniqKey="Harcourt R" first="Robert" last="Harcourt">Robert Harcourt</name>
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<author><name sortKey="Hindell, Mark A" sort="Hindell, Mark A" uniqKey="Hindell M" first="Mark A" last="Hindell">Mark A. Hindell</name>
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<author><name sortKey="Cubaynes, Sarah" sort="Cubaynes, Sarah" uniqKey="Cubaynes S" first="Sarah" last="Cubaynes">Sarah Cubaynes</name>
<affiliation><nlm:affiliation>Department of Zoology, University of Oxford, The Tinbergen Building, South Parks Road, Oxford OX1 3PS, UK.</nlm:affiliation>
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<author><name sortKey="Gimenez, Olivier" sort="Gimenez, Olivier" uniqKey="Gimenez O" first="Olivier" last="Gimenez">Olivier Gimenez</name>
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<author><name sortKey="Mcmahon, Clive R" sort="Mcmahon, Clive R" uniqKey="Mcmahon C" first="Clive R" last="Mcmahon">Clive R. Mcmahon</name>
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<front><div type="abstract" xml:lang="en">When to commence breeding is a crucial life-history decision that may be the most important determinant of an individual's lifetime reproductive output and can have major consequences on population dynamics. The age at which individuals first reproduce is an important factor influencing the intensity of potential costs (e.g. reduced survival) involved in the first breeding event. However, quantifying age-related variation in the cost of first reproduction in wild animals remains challenging because of the difficulty in reliably recording the first breeding event. Here, using a multi-event capture-recapture model that accounts for both imperfect detection and uncertainty in the breeding status on an 18-year dataset involving 6637 individuals, we estimated age and state-specific survival of female elephant seals (Mirounga leonina) in the declining Macquarie Island population. We detected a clear cost of first reproduction on survival. This cost was higher for both younger first-time breeders and older first-time breeders compared with females recruiting at age four, the overall mean age at first reproduction. Neither earlier primiparity nor delaying primiparity appear to confer any evolutionary advantage, rather the optimal strategy seems to be to start breeding at a single age, 4 years.</div>
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<CommentsCorrections RefType="Cites"><RefSource>Proc Biol Sci. 2014 May 7;281(1782):20132842</RefSource>
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Age-specific cost of first reproduction in female southern elephant seals.

Age-specific cost of first reproduction in female southern elephant seals.

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki