Low success of shiny cowbird chicks parasitizing rufous-bellied thrushes: chick–chick competition or parental discrimination?
Identifieur interne : 001B20 ( Istex/Corpus ); précédent : 001B19; suivant : 001B21Low success of shiny cowbird chicks parasitizing rufous-bellied thrushes: chick–chick competition or parental discrimination?
Auteurs : Gabriela LichtensteinSource :
- Animal Behaviour [ 0003-3472 ] ; 2001.
Abstract
The interaction between parasitic chicks and their hosts can have three outcomes: parasitic chicks might be favoured over the host young, disfavoured, or hosts might behave towards the parasitic chicks as towards their own young. I tested these hypotheses in a study of shiny cowbirds, Molothrus bonariensis, parasitizing rufous-bellied thrushes,Turdus rufiventris . Parasitic chicks were fed significantly less than the host young. I tested whether this was because parasitic chicks were outcompeted by the larger host young, or were disfavoured by the host adults. I videotaped parasitized broods containing a shiny cowbird raised with one host chick and nonparasitized broods containing a large and a small thrush that matched the size difference between the host and the parasitic chick. Parents used different rules for feeding chicks in the parasitized and nonparasitized nests. In nonparasitized nests, parents fed the chick that was positioned highest in the nest. However, in the parasitized nests, host chicks had a significantly greater chance of getting fed if they were higher or at the same height as the cowbird. When the cowbird chick was positioned higher than the thrush chicks, there was no difference between the chicks in the probabilities of their being fed. In addition, even when parents offered food to the cowbird chick, they then removed it from the cowbird's gape to feed their own chick as soon as it started begging. These results suggest that the poor success of shiny cowbird nestlings at nests of rufous-bellied thrushes is not simply due to competition with their larger nestmates, but may also involve parental discrimination. I discuss why hosts with chicks larger than the parasitic chicks may be more likely to evolve discrimination against parasitic chicks.
Url:
DOI: 10.1006/anbe.2000.1595
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<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Low success of shiny cowbird chicks parasitizing rufous-bellied thrushes: chick–chick competition or parental discrimination?</title><author><name sortKey="Lichtenstein, Gabriela" sort="Lichtenstein, Gabriela" uniqKey="Lichtenstein G" first="Gabriela" last="Lichtenstein">Gabriela Lichtenstein</name><affiliation><mods:affiliation>Department of Zoology, University of Cambridge</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:509EEFB0C1EE2CE4E0A74813FD93F20FED534504</idno><date when="2001" year="2001">2001</date><idno type="doi">10.1006/anbe.2000.1595</idno><idno type="url">https://api.istex.fr/document/509EEFB0C1EE2CE4E0A74813FD93F20FED534504/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001B20</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001B20</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Low success of shiny cowbird chicks parasitizing rufous-bellied thrushes: chick–chick competition or parental discrimination?</title><author><name sortKey="Lichtenstein, Gabriela" sort="Lichtenstein, Gabriela" uniqKey="Lichtenstein G" first="Gabriela" last="Lichtenstein">Gabriela Lichtenstein</name><affiliation><mods:affiliation>Department of Zoology, University of Cambridge</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Animal Behaviour</title><title level="j" type="abbrev">YANBE</title><idno type="ISSN">0003-3472</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2001">2001</date><biblScope unit="volume">61</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="401">401</biblScope><biblScope unit="page" to="413">413</biblScope></imprint><idno type="ISSN">0003-3472</idno></series><idno type="istex">509EEFB0C1EE2CE4E0A74813FD93F20FED534504</idno><idno type="DOI">10.1006/anbe.2000.1595</idno><idno type="PII">S0003-3472(00)91595-1</idno><idno type="ArticleID">91595</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0003-3472</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The interaction between parasitic chicks and their hosts can have three outcomes: parasitic chicks might be favoured over the host young, disfavoured, or hosts might behave towards the parasitic chicks as towards their own young. I tested these hypotheses in a study of shiny cowbirds, Molothrus bonariensis, parasitizing rufous-bellied thrushes,Turdus rufiventris . Parasitic chicks were fed significantly less than the host young. I tested whether this was because parasitic chicks were outcompeted by the larger host young, or were disfavoured by the host adults. I videotaped parasitized broods containing a shiny cowbird raised with one host chick and nonparasitized broods containing a large and a small thrush that matched the size difference between the host and the parasitic chick. Parents used different rules for feeding chicks in the parasitized and nonparasitized nests. In nonparasitized nests, parents fed the chick that was positioned highest in the nest. However, in the parasitized nests, host chicks had a significantly greater chance of getting fed if they were higher or at the same height as the cowbird. When the cowbird chick was positioned higher than the thrush chicks, there was no difference between the chicks in the probabilities of their being fed. In addition, even when parents offered food to the cowbird chick, they then removed it from the cowbird's gape to feed their own chick as soon as it started begging. These results suggest that the poor success of shiny cowbird nestlings at nests of rufous-bellied thrushes is not simply due to competition with their larger nestmates, but may also involve parental discrimination. I discuss why hosts with chicks larger than the parasitic chicks may be more likely to evolve discrimination against parasitic chicks.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>Gabriela Lichtenstein</name><affiliations><json:string>Department of Zoology, University of Cambridge</json:string></affiliations></json:item></author><articleId><json:string>91595</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>The interaction between parasitic chicks and their hosts can have three outcomes: parasitic chicks might be favoured over the host young, disfavoured, or hosts might behave towards the parasitic chicks as towards their own young. I tested these hypotheses in a study of shiny cowbirds, Molothrus bonariensis, parasitizing rufous-bellied thrushes,Turdus rufiventris . Parasitic chicks were fed significantly less than the host young. I tested whether this was because parasitic chicks were outcompeted by the larger host young, or were disfavoured by the host adults. I videotaped parasitized broods containing a shiny cowbird raised with one host chick and nonparasitized broods containing a large and a small thrush that matched the size difference between the host and the parasitic chick. Parents used different rules for feeding chicks in the parasitized and nonparasitized nests. In nonparasitized nests, parents fed the chick that was positioned highest in the nest. However, in the parasitized nests, host chicks had a significantly greater chance of getting fed if they were higher or at the same height as the cowbird. When the cowbird chick was positioned higher than the thrush chicks, there was no difference between the chicks in the probabilities of their being fed. In addition, even when parents offered food to the cowbird chick, they then removed it from the cowbird's gape to feed their own chick as soon as it started begging. These results suggest that the poor success of shiny cowbird nestlings at nests of rufous-bellied thrushes is not simply due to competition with their larger nestmates, but may also involve parental discrimination. 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Lichtenstein, International Institute for Environment and Development (IIED-AL), Gral Paz 1180, Buenos Aires, Argentina (email:gaby@interlink.com.ar).</p></note><affiliation>Department of Zoology, University of Cambridge</affiliation></author></analytic><monogr><title level="j">Animal Behaviour</title><title level="j" type="abbrev">YANBE</title><idno type="pISSN">0003-3472</idno><idno type="PII">S0003-3472(00)X0010-3</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2001"></date><biblScope unit="volume">61</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="401">401</biblScope><biblScope unit="page" to="413">413</biblScope></imprint></monogr><idno type="istex">509EEFB0C1EE2CE4E0A74813FD93F20FED534504</idno><idno type="DOI">10.1006/anbe.2000.1595</idno><idno type="PII">S0003-3472(00)91595-1</idno><idno type="ArticleID">91595</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2001</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The interaction between parasitic chicks and their hosts can have three outcomes: parasitic chicks might be favoured over the host young, disfavoured, or hosts might behave towards the parasitic chicks as towards their own young. I tested these hypotheses in a study of shiny cowbirds, Molothrus bonariensis, parasitizing rufous-bellied thrushes,Turdus rufiventris . Parasitic chicks were fed significantly less than the host young. I tested whether this was because parasitic chicks were outcompeted by the larger host young, or were disfavoured by the host adults. I videotaped parasitized broods containing a shiny cowbird raised with one host chick and nonparasitized broods containing a large and a small thrush that matched the size difference between the host and the parasitic chick. Parents used different rules for feeding chicks in the parasitized and nonparasitized nests. In nonparasitized nests, parents fed the chick that was positioned highest in the nest. However, in the parasitized nests, host chicks had a significantly greater chance of getting fed if they were higher or at the same height as the cowbird. When the cowbird chick was positioned higher than the thrush chicks, there was no difference between the chicks in the probabilities of their being fed. In addition, even when parents offered food to the cowbird chick, they then removed it from the cowbird's gape to feed their own chick as soon as it started begging. These results suggest that the poor success of shiny cowbird nestlings at nests of rufous-bellied thrushes is not simply due to competition with their larger nestmates, but may also involve parental discrimination. I discuss why hosts with chicks larger than the parasitic chicks may be more likely to evolve discrimination against parasitic chicks.</p></abstract></profileDesc><revisionDesc><change when="2000-02-08">Modified</change><change when="2001">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/509EEFB0C1EE2CE4E0A74813FD93F20FED534504/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: tail"><istex:xmlDeclaration>version="1.0" encoding="UTF-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>YANBE</jid><aid>91595</aid><ce:pii>S0003-3472(00)91595-1</ce:pii><ce:doi>10.1006/anbe.2000.1595</ce:doi><ce:copyright type="other" year="2001">The Association for the Study of Animal Behaviour</ce:copyright></item-info><head><ce:dochead><ce:textfn>Regular Articles</ce:textfn></ce:dochead><ce:title>Low success of shiny cowbird chicks parasitizing rufous-bellied thrushes: chick–chick competition or parental discrimination?</ce:title><ce:author-group><ce:author><ce:given-name>Gabriela</ce:given-name><ce:surname>Lichtenstein</ce:surname><ce:cross-ref refid="FN1"><ce:sup loc="post">f1</ce:sup><ce:footnote id="FN1"><ce:label>f1</ce:label><ce:note-para>Correspondence and present address: G. Lichtenstein, International Institute for Environment and Development (IIED-AL), Gral Paz 1180, Buenos Aires, Argentina (email:gaby@interlink.com.ar).</ce:note-para></ce:footnote></ce:cross-ref></ce:author><ce:affiliation><ce:textfn>Department of Zoology, University of Cambridge</ce:textfn></ce:affiliation></ce:author-group><ce:date-received day="20" month="10" year="1999"></ce:date-received><ce:date-revised day="8" month="2" year="2000"></ce:date-revised><ce:date-accepted day="12" month="7" year="2000"></ce:date-accepted><ce:abstract class="author"><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para view="all" id="simple-para.0010">The interaction between parasitic chicks and their hosts can have three outcomes: parasitic chicks might be favoured over the host young, disfavoured, or hosts might behave towards the parasitic chicks as towards their own young. I tested these hypotheses in a study of shiny cowbirds, <ce:italic>Molothrus bonariensis</ce:italic>, parasitizing rufous-bellied thrushes,<ce:italic>Turdus rufiventris</ce:italic> . Parasitic chicks were fed significantly less than the host young. I tested whether this was because parasitic chicks were outcompeted by the larger host young, or were disfavoured by the host adults. I videotaped parasitized broods containing a shiny cowbird raised with one host chick and nonparasitized broods containing a large and a small thrush that matched the size difference between the host and the parasitic chick. Parents used different rules for feeding chicks in the parasitized and nonparasitized nests. In nonparasitized nests, parents fed the chick that was positioned highest in the nest. However, in the parasitized nests, host chicks had a significantly greater chance of getting fed if they were higher or at the same height as the cowbird. When the cowbird chick was positioned higher than the thrush chicks, there was no difference between the chicks in the probabilities of their being fed. In addition, even when parents offered food to the cowbird chick, they then removed it from the cowbird's gape to feed their own chick as soon as it started begging. These results suggest that the poor success of shiny cowbird nestlings at nests of rufous-bellied thrushes is not simply due to competition with their larger nestmates, but may also involve parental discrimination. I discuss why hosts with chicks larger than the parasitic chicks may be more likely to evolve discrimination against parasitic chicks.</ce:simple-para></ce:abstract-sec></ce:abstract></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Low success of shiny cowbird chicks parasitizing rufous-bellied thrushes: chick–chick competition or parental discrimination?</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Low success of shiny cowbird chicks parasitizing rufous-bellied thrushes: chick–chick competition or parental discrimination?</title></titleInfo><name type="personal"><namePart type="given">Gabriela</namePart><namePart type="family">Lichtenstein</namePart><affiliation>Department of Zoology, University of Cambridge</affiliation><description>Correspondence and present address: G. Lichtenstein, International Institute for Environment and Development (IIED-AL), Gral Paz 1180, Buenos Aires, Argentina (email:gaby@interlink.com.ar).</description><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">2001</dateIssued><dateModified encoding="w3cdtf">2000-02-08</dateModified><copyrightDate encoding="w3cdtf">2001</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The interaction between parasitic chicks and their hosts can have three outcomes: parasitic chicks might be favoured over the host young, disfavoured, or hosts might behave towards the parasitic chicks as towards their own young. I tested these hypotheses in a study of shiny cowbirds, Molothrus bonariensis, parasitizing rufous-bellied thrushes,Turdus rufiventris . Parasitic chicks were fed significantly less than the host young. I tested whether this was because parasitic chicks were outcompeted by the larger host young, or were disfavoured by the host adults. I videotaped parasitized broods containing a shiny cowbird raised with one host chick and nonparasitized broods containing a large and a small thrush that matched the size difference between the host and the parasitic chick. Parents used different rules for feeding chicks in the parasitized and nonparasitized nests. In nonparasitized nests, parents fed the chick that was positioned highest in the nest. However, in the parasitized nests, host chicks had a significantly greater chance of getting fed if they were higher or at the same height as the cowbird. When the cowbird chick was positioned higher than the thrush chicks, there was no difference between the chicks in the probabilities of their being fed. In addition, even when parents offered food to the cowbird chick, they then removed it from the cowbird's gape to feed their own chick as soon as it started begging. These results suggest that the poor success of shiny cowbird nestlings at nests of rufous-bellied thrushes is not simply due to competition with their larger nestmates, but may also involve parental discrimination. I discuss why hosts with chicks larger than the parasitic chicks may be more likely to evolve discrimination against parasitic chicks.</abstract><note type="content">Section title: Regular Articles</note><relatedItem type="host"><titleInfo><title>Animal Behaviour</title></titleInfo><titleInfo type="abbreviated"><title>YANBE</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">200102</dateIssued></originInfo><identifier type="ISSN">0003-3472</identifier><identifier type="PII">S0003-3472(00)X0010-3</identifier><part><date>200102</date><detail type="volume"><number>61</number><caption>vol.</caption></detail><detail type="issue"><number>2</number><caption>no.</caption></detail><extent unit="issue pages"><start>277</start><end>515</end></extent><extent unit="pages"><start>401</start><end>413</end></extent></part></relatedItem><identifier type="istex">509EEFB0C1EE2CE4E0A74813FD93F20FED534504</identifier><identifier type="DOI">10.1006/anbe.2000.1595</identifier><identifier type="PII">S0003-3472(00)91595-1</identifier><identifier type="ArticleID">91595</identifier><accessCondition type="use and reproduction" contentType="copyright">©2001 The Association for the Study of Animal Behaviour</accessCondition><recordInfo><recordContentSource>ELSEVIER</recordContentSource><recordOrigin>The Association for the Study of Animal Behaviour, ©2001</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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