Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals.
Identifieur interne : 000E26 ( PubMed/Corpus ); précédent : 000E25; suivant : 000E27Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals.
Auteurs : Tiphaine Jeanniard-Du-Dot ; Andrew W. Trites ; John P Y. Arnould ; Christophe GuinetSource :
- PloS one [ 1932-6203 ] ; 2017.
English descriptors
- KwdEn :
- MESH :
- growth & development : Fur Seals.
- metabolism : Fur Seals.
- physiology : Fur Seals.
- Animals, Body Size, Energy Metabolism, Female, Predatory Behavior, Reproduction, Weaning.
Abstract
The efficiency with which individuals extract energy from their environment defines their survival and reproductive success, and thus their selective contribution to the population. Individuals that forage more efficiently (i.e., when energy gained exceeds energy expended) are likely to be more successful at raising viable offspring than individuals that forage less efficiently. Our goal was to test this prediction in large long-lived mammals under free-ranging conditions. To do so, we equipped 20 lactating Antarctic fur seals (Arctocephalus gazella) breeding on Kerguelen Island in the Southern Ocean with tags that recorded GPS locations, depth and tri-axial acceleration to determine at-sea behaviours and detailed time-activity budgets during their foraging trips. We also simultaneously measured energy spent at sea using the doubly-labeled water (DLW) method, and estimated the energy acquired while foraging from 1) type and energy content of prey species present in scat remains, and 2) numbers of prey capture attempts determined from head acceleration. Finally, we followed the growth of 36 pups from birth until weaning (of which 20 were the offspring of our 20 tracked mothers), and used the relative differences in body mass of pups at weaning as an index of first year survival and thus the reproductive success of their mothers. Our results show that females with greater foraging efficiencies produced relatively bigger pups at weaning. These mothers achieved greater foraging efficiency by extracting more energy per minute of diving rather than by reducing energy expenditure. This strategy also resulted in the females spending less time diving and less time overall at sea, which allowed them to deliver higher quality milk to their pups, or allowed their pups to suckle more frequently, or both. The linkage we demonstrate between reproductive success and the quality of individuals as foragers provides an individual-based quantitative framework to investigate how changes in the availability and accessibility of prey can affect fitness of animals.
DOI: 10.1371/journal.pone.0174001
PubMed: 28453563
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pubmed:28453563Le document en format XML
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Trites</name><affiliation><nlm:affiliation>Marine Mammal Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada.</nlm:affiliation></affiliation></author><author><name sortKey="Arnould, John P Y" sort="Arnould, John P Y" uniqKey="Arnould J" first="John P Y" last="Arnould">John P Y. Arnould</name><affiliation><nlm:affiliation>School of Life and Environmental Sciences, Deakin University, Burwood, VIC, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Guinet, Christophe" sort="Guinet, Christophe" uniqKey="Guinet C" first="Christophe" last="Guinet">Christophe Guinet</name><affiliation><nlm:affiliation>Centre d'Etudes Biologiques de Chizé, CNRS, Villiers en Bois, France.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2017">2017</date><idno type="RBID">pubmed:28453563</idno><idno type="pmid">28453563</idno><idno type="doi">10.1371/journal.pone.0174001</idno><idno type="wicri:Area/PubMed/Corpus">000E26</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000E26</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals.</title><author><name sortKey="Jeanniard Du Dot, Tiphaine" sort="Jeanniard Du Dot, Tiphaine" uniqKey="Jeanniard Du Dot T" first="Tiphaine" last="Jeanniard-Du-Dot">Tiphaine Jeanniard-Du-Dot</name><affiliation><nlm:affiliation>Marine Mammal Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada.</nlm:affiliation></affiliation></author><author><name sortKey="Trites, Andrew W" sort="Trites, Andrew W" uniqKey="Trites A" first="Andrew W" last="Trites">Andrew W. Trites</name><affiliation><nlm:affiliation>Marine Mammal Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada.</nlm:affiliation></affiliation></author><author><name sortKey="Arnould, John P Y" sort="Arnould, John P Y" uniqKey="Arnould J" first="John P Y" last="Arnould">John P Y. Arnould</name><affiliation><nlm:affiliation>School of Life and Environmental Sciences, Deakin University, Burwood, VIC, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Guinet, Christophe" sort="Guinet, Christophe" uniqKey="Guinet C" first="Christophe" last="Guinet">Christophe Guinet</name><affiliation><nlm:affiliation>Centre d'Etudes Biologiques de Chizé, CNRS, Villiers en Bois, France.</nlm:affiliation></affiliation></author></analytic><series><title level="j">PloS one</title><idno type="eISSN">1932-6203</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Body Size</term><term>Energy Metabolism</term><term>Female</term><term>Fur Seals (growth & development)</term><term>Fur Seals (metabolism)</term><term>Fur Seals (physiology)</term><term>Predatory Behavior</term><term>Reproduction</term><term>Weaning</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Fur Seals</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Fur Seals</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Fur Seals</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Body Size</term><term>Energy Metabolism</term><term>Female</term><term>Predatory Behavior</term><term>Reproduction</term><term>Weaning</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The efficiency with which individuals extract energy from their environment defines their survival and reproductive success, and thus their selective contribution to the population. Individuals that forage more efficiently (i.e., when energy gained exceeds energy expended) are likely to be more successful at raising viable offspring than individuals that forage less efficiently. Our goal was to test this prediction in large long-lived mammals under free-ranging conditions. To do so, we equipped 20 lactating Antarctic fur seals (Arctocephalus gazella) breeding on Kerguelen Island in the Southern Ocean with tags that recorded GPS locations, depth and tri-axial acceleration to determine at-sea behaviours and detailed time-activity budgets during their foraging trips. We also simultaneously measured energy spent at sea using the doubly-labeled water (DLW) method, and estimated the energy acquired while foraging from 1) type and energy content of prey species present in scat remains, and 2) numbers of prey capture attempts determined from head acceleration. Finally, we followed the growth of 36 pups from birth until weaning (of which 20 were the offspring of our 20 tracked mothers), and used the relative differences in body mass of pups at weaning as an index of first year survival and thus the reproductive success of their mothers. Our results show that females with greater foraging efficiencies produced relatively bigger pups at weaning. These mothers achieved greater foraging efficiency by extracting more energy per minute of diving rather than by reducing energy expenditure. This strategy also resulted in the females spending less time diving and less time overall at sea, which allowed them to deliver higher quality milk to their pups, or allowed their pups to suckle more frequently, or both. The linkage we demonstrate between reproductive success and the quality of individuals as foragers provides an individual-based quantitative framework to investigate how changes in the availability and accessibility of prey can affect fitness of animals.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">28453563</PMID><DateCreated><Year>2017</Year><Month>04</Month><Day>28</Day></DateCreated><DateCompleted><Year>2017</Year><Month>09</Month><Day>07</Day></DateCompleted><DateRevised><Year>2017</Year><Month>09</Month><Day>07</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Electronic">1932-6203</ISSN><JournalIssue CitedMedium="Internet"><Volume>12</Volume><Issue>4</Issue><PubDate><Year>2017</Year></PubDate></JournalIssue><Title>PloS one</Title><ISOAbbreviation>PLoS ONE</ISOAbbreviation></Journal><ArticleTitle>Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals.</ArticleTitle><Pagination><MedlinePgn>e0174001</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1371/journal.pone.0174001</ELocationID><Abstract><AbstractText>The efficiency with which individuals extract energy from their environment defines their survival and reproductive success, and thus their selective contribution to the population. Individuals that forage more efficiently (i.e., when energy gained exceeds energy expended) are likely to be more successful at raising viable offspring than individuals that forage less efficiently. Our goal was to test this prediction in large long-lived mammals under free-ranging conditions. To do so, we equipped 20 lactating Antarctic fur seals (Arctocephalus gazella) breeding on Kerguelen Island in the Southern Ocean with tags that recorded GPS locations, depth and tri-axial acceleration to determine at-sea behaviours and detailed time-activity budgets during their foraging trips. We also simultaneously measured energy spent at sea using the doubly-labeled water (DLW) method, and estimated the energy acquired while foraging from 1) type and energy content of prey species present in scat remains, and 2) numbers of prey capture attempts determined from head acceleration. Finally, we followed the growth of 36 pups from birth until weaning (of which 20 were the offspring of our 20 tracked mothers), and used the relative differences in body mass of pups at weaning as an index of first year survival and thus the reproductive success of their mothers. Our results show that females with greater foraging efficiencies produced relatively bigger pups at weaning. These mothers achieved greater foraging efficiency by extracting more energy per minute of diving rather than by reducing energy expenditure. This strategy also resulted in the females spending less time diving and less time overall at sea, which allowed them to deliver higher quality milk to their pups, or allowed their pups to suckle more frequently, or both. The linkage we demonstrate between reproductive success and the quality of individuals as foragers provides an individual-based quantitative framework to investigate how changes in the availability and accessibility of prey can affect fitness of animals.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Jeanniard-du-Dot</LastName><ForeName>Tiphaine</ForeName><Initials>T</Initials><Identifier Source="ORCID">http://orcid.org/0000-0003-1985-8325</Identifier><AffiliationInfo><Affiliation>Marine Mammal Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Centre d'Etudes Biologiques de Chizé, CNRS, Villiers en Bois, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Trites</LastName><ForeName>Andrew W</ForeName><Initials>AW</Initials><AffiliationInfo><Affiliation>Marine Mammal Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Arnould</LastName><ForeName>John P Y</ForeName><Initials>JPY</Initials><AffiliationInfo><Affiliation>School of Life and Environmental Sciences, Deakin University, Burwood, VIC, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Guinet</LastName><ForeName>Christophe</ForeName><Initials>C</Initials><AffiliationInfo><Affiliation>Centre d'Etudes Biologiques de Chizé, CNRS, Villiers en Bois, France.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2017</Year><Month>04</Month><Day>28</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>PLoS One</MedlineTA><NlmUniqueID>101285081</NlmUniqueID><ISSNLinking>1932-6203</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><CommentsCorrectionsList><CommentsCorrections RefType="Cites"><RefSource>J Exp Mar Bio Ecol. 2000 May 18;248(1):53-78</RefSource><PMID Version="1">10764884</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>PLoS One. 2015 Jun 24;10(6):e0128789</RefSource><PMID Version="1">26107647</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>J Exp Biol. 1992 Sep;170:35-42</RefSource><PMID Version="1">1402612</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>PLoS One. 2017 Mar 29;12 (3):e0173797</RefSource><PMID Version="1">28355282</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Oecologia. 1990 Jan;82(1):56-67</RefSource><PMID Version="1">28313138</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>J Exp Biol. 1994 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Version="1">28314043</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Ecology. 2010 Jul;91(7):2044-55</RefSource><PMID Version="1">20715627</PMID></CommentsCorrections></CommentsCorrectionsList><MeshHeadingList><MeshHeading><DescriptorName UI="D000818" MajorTopicYN="N">Animals</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D049628" MajorTopicYN="N">Body Size</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004734" MajorTopicYN="Y">Energy Metabolism</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005260" MajorTopicYN="N">Female</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D046069" MajorTopicYN="N">Fur Seals</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D011235" 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