Habitat Saturation Results in Joint-Nesting Female Coalitions in a Social Bird
Joint nesting by females and cooperative polyandry—cooperatively breeding groups with a male-biased breeder sex ratio—are little-understood, rare breeding systems. We tested alternative hypotheses of factors potentially driving these phenomena in a population of joint-nesting acorn woodpeckers (Mela...
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Veröffentlicht in: | The American naturalist 2019-06, Vol.193 (6), p.830-840 |
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creator | Barve, Sahas Koenig, Walter D. Haydock, Joseph Walters, Eric L. |
description | Joint nesting by females and cooperative polyandry—cooperatively breeding groups with a male-biased breeder sex ratio—are little-understood, rare breeding systems. We tested alternative hypotheses of factors potentially driving these phenomena in a population of joint-nesting acorn woodpeckers (Melanerpes formicivorus). During periods of high population density and thus low independent breeding opportunities, acorn woodpecker females formed joint-nesting coalitions with close kin. Coalitions were typically associated with groups with a male bias. We found strong evidence for both inter- and intrasexual conflict, as joint nesting conferred a fitness benefit to some males, a significant fitness cost to females, and no gain in per capita reproductive output for either sex. Such conflict, particularly the cost to females, may be an important reason why joint nesting is rare among cooperatively breeding taxa. |
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We tested alternative hypotheses of factors potentially driving these phenomena in a population of joint-nesting acorn woodpeckers (Melanerpes formicivorus). During periods of high population density and thus low independent breeding opportunities, acorn woodpecker females formed joint-nesting coalitions with close kin. Coalitions were typically associated with groups with a male bias. We found strong evidence for both inter- and intrasexual conflict, as joint nesting conferred a fitness benefit to some males, a significant fitness cost to females, and no gain in per capita reproductive output for either sex. 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Such conflict, particularly the cost to females, may be an important reason why joint nesting is rare among cooperatively breeding taxa.</description><subject>Animal breeding</subject><subject>Animals</subject><subject>Associations</subject><subject>Birds</subject><subject>Communal breeding</subject><subject>Ecosystem</subject><subject>Female</subject><subject>Females</subject><subject>Fitness</subject><subject>Genetic Fitness</subject><subject>Male</subject><subject>Males</subject><subject>Nesting</subject><subject>Nesting Behavior</subject><subject>Polyandry</subject><subject>Population Density</subject><subject>Sex</subject><subject>Sex ratio</subject><subject>Sexual Behavior, Animal</subject><subject>Social Behavior</subject><issn>0003-0147</issn><issn>1537-5323</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpd0NFKwzAUBuAgiptTH0ECinhTTZqmTS51OKeMCU6vS5YmM6NtZpJe-PZmdip4dXLg48_hB-AUo2uMWH5TIIIZ2wNDTEmRUJKSfTBECJEE4awYgCPv13HlGaeHYEBwfFHOh2A-FUsTRIALETongrEtfFG-q4OHpoVP1rQhmSsfTLuCE9WIWsGxFbXZym8i4MJKI2p4Z1x1DA60qL062c0ReJvcv46nyez54XF8O0skyVlIUkzzKitwqrHO5RJXTGes4qjQGZasYoQWTGRMqZxpKjQWLBcpp5mUmkqkNRmBqz534-xHF88rG-OlqmvRKtv5Mk1JijBnKI30_B9d28618bqoipxxUmAW1WWvpLPeO6XLjTONcJ8lRuW24bJvOMKzXVy3bFT1y34qjeCiB518N1Ks7MYp7_8-3eV8AVpogB4</recordid><startdate>20190601</startdate><enddate>20190601</enddate><creator>Barve, Sahas</creator><creator>Koenig, Walter D.</creator><creator>Haydock, Joseph</creator><creator>Walters, Eric L.</creator><general>The University of Chicago Press</general><general>University of Chicago, acting through its Press</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7SN</scope><scope>7SS</scope><scope>7ST</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>RC3</scope><scope>SOI</scope><scope>7X8</scope></search><sort><creationdate>20190601</creationdate><title>Habitat Saturation Results in Joint-Nesting Female Coalitions in a Social Bird</title><author>Barve, Sahas ; Koenig, Walter D. ; Haydock, Joseph ; Walters, Eric L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c368t-2156d4712f1f6cb1d8f48d907f41c8d83578a48ee68f5af1a86a2954ccf5c0ff3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Animal breeding</topic><topic>Animals</topic><topic>Associations</topic><topic>Birds</topic><topic>Communal breeding</topic><topic>Ecosystem</topic><topic>Female</topic><topic>Females</topic><topic>Fitness</topic><topic>Genetic Fitness</topic><topic>Male</topic><topic>Males</topic><topic>Nesting</topic><topic>Nesting Behavior</topic><topic>Polyandry</topic><topic>Population Density</topic><topic>Sex</topic><topic>Sex ratio</topic><topic>Sexual Behavior, Animal</topic><topic>Social Behavior</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Barve, Sahas</creatorcontrib><creatorcontrib>Koenig, Walter D.</creatorcontrib><creatorcontrib>Haydock, Joseph</creatorcontrib><creatorcontrib>Walters, Eric L.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Environment Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><collection>Environment Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>The American naturalist</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Barve, Sahas</au><au>Koenig, Walter D.</au><au>Haydock, Joseph</au><au>Walters, Eric L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Habitat Saturation Results in Joint-Nesting Female Coalitions in a Social Bird</atitle><jtitle>The American naturalist</jtitle><addtitle>Am Nat</addtitle><date>2019-06-01</date><risdate>2019</risdate><volume>193</volume><issue>6</issue><spage>830</spage><epage>840</epage><pages>830-840</pages><issn>0003-0147</issn><eissn>1537-5323</eissn><abstract>Joint nesting by females and cooperative polyandry—cooperatively breeding groups with a male-biased breeder sex ratio—are little-understood, rare breeding systems. 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subjects | Animal breeding Animals Associations Birds Communal breeding Ecosystem Female Females Fitness Genetic Fitness Male Males Nesting Nesting Behavior Polyandry Population Density Sex Sex ratio Sexual Behavior, Animal Social Behavior |
title | Habitat Saturation Results in Joint-Nesting Female Coalitions in a Social Bird |
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