Consequences to fitness‐related traits of hybridization between farmed and wild Atlantic salmon, Salmo salar
Identifieur interne : 000E93 ( Istex/Corpus ); précédent : 000E92; suivant : 000E94Consequences to fitness‐related traits of hybridization between farmed and wild Atlantic salmon, Salmo salar
Auteurs : J. L. Lawlor ; J. A. HutchingsSource :
- Journal of Fish Biology [ 0022-1112 ] ; 2004-12.
Abstract
Introgression between wild and farmed Atlantic salmon Salmo salar has been hypothesized to influence the persistence of wild populations, particularly those at heightened risk of extinction. Based on pure and hybrid crosses involving one farmed and two wild populations (Tusket River and Stewiacke River, an endangered population) in a common‐garden environment, we examined the consequences of introgression to survival, growth, and disease resistance in the first year of life. Introgression with farmed salmon had either no effect (Stewiacke) or a negative effect (Tusket) on survival. Importantly, the among‐family variance in survival (a negative correlate of population persistence) was higher for the hybrids than it was among the pure crosses. There was also evidence of genetic differences in growth rate and disease susceptibility. Introgression with their farmed counterparts is unlikely to have a positive effect on the fitness of wild Atlantic salmon. The degree to which genetic interactions between farmed and wild salmon threaten the latter's persistence almost certainly depends on the degree to which individuals are adapted to their local environment, on the genetic differentiation between farmed and wild individuals, and on the relative proportions of farmed and wild salmon during spawning.
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DOI: 10.1111/j.0022-1112.2004.0559n.x
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Based on pure and hybrid crosses involving one farmed and two wild populations (Tusket River and Stewiacke River, an endangered population) in a common‐garden environment, we examined the consequences of introgression to survival, growth, and disease resistance in the first year of life. Introgression with farmed salmon had either no effect (Stewiacke) or a negative effect (Tusket) on survival. Importantly, the among‐family variance in survival (a negative correlate of population persistence) was higher for the hybrids than it was among the pure crosses. There was also evidence of genetic differences in growth rate and disease susceptibility. Introgression with their farmed counterparts is unlikely to have a positive effect on the fitness of wild Atlantic salmon. The degree to which genetic interactions between farmed and wild salmon threaten the latter's persistence almost certainly depends on the degree to which individuals are adapted to their local environment, on the genetic differentiation between farmed and wild individuals, and on the relative proportions of farmed and wild salmon during spawning.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>J. L. Lawlor</name><affiliations><json:string>(1Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada).</json:string></affiliations></json:item><json:item><name>J. A. 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L.</givenNames><familyName>Lawlor</familyName></personName></creator> 1 <creator creatorRole="author" xml:id="cr2" affiliationRef="#aff-1-1"><personName><givenNames>J. A.</givenNames><familyName>Hutchings</familyName></personName></creator> 1 </creators><affiliationGroup><affiliation xml:id="aff-1-1" countryCode="CA"><unparsedAffiliation>(<sup>1</sup><i>Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada</i>).</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><p>Introgression between wild and farmed Atlantic salmon <i>Salmo salar</i> has been hypothesized to influence the persistence of wild populations, particularly those at heightened risk of extinction. Based on pure and hybrid crosses involving one farmed and two wild populations (Tusket River and Stewiacke River, an endangered population) in a common‐garden environment, we examined the consequences of introgression to survival, growth, and disease resistance in the first year of life. Introgression with farmed salmon had either no effect (Stewiacke) or a negative effect (Tusket) on survival. Importantly, the among‐family variance in survival (a negative correlate of population persistence) was higher for the hybrids than it was among the pure crosses. There was also evidence of genetic differences in growth rate and disease susceptibility. Introgression with their farmed counterparts is unlikely to have a positive effect on the fitness of wild Atlantic salmon. The degree to which genetic interactions between farmed and wild salmon threaten the latter's persistence almost certainly depends on the degree to which individuals are adapted to their local environment, on the genetic differentiation between farmed and wild individuals, and on the relative proportions of farmed and wild salmon during spawning.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Consequences to fitness‐related traits of hybridization between farmed and wild Atlantic salmon, Salmo salar</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>paper abstracts</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Consequences to fitness‐related traits of hybridization between farmed and wild Atlantic salmon, Salmo salar</title></titleInfo><name type="personal"><namePart type="given">J. L.</namePart><namePart type="family">Lawlor</namePart><affiliation>(1Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada).</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J. A.</namePart><namePart type="family">Hutchings</namePart><affiliation>(1Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada).</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="abstract" displayLabel="abstract"></genre><originInfo><publisher>Blackwell Science Ltd</publisher><place><placeTerm type="text">Oxford, UK; Malden, USA</placeTerm></place><dateIssued encoding="w3cdtf">2004-12</dateIssued><copyrightDate encoding="w3cdtf">2004</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">Introgression between wild and farmed Atlantic salmon Salmo salar has been hypothesized to influence the persistence of wild populations, particularly those at heightened risk of extinction. Based on pure and hybrid crosses involving one farmed and two wild populations (Tusket River and Stewiacke River, an endangered population) in a common‐garden environment, we examined the consequences of introgression to survival, growth, and disease resistance in the first year of life. Introgression with farmed salmon had either no effect (Stewiacke) or a negative effect (Tusket) on survival. Importantly, the among‐family variance in survival (a negative correlate of population persistence) was higher for the hybrids than it was among the pure crosses. There was also evidence of genetic differences in growth rate and disease susceptibility. Introgression with their farmed counterparts is unlikely to have a positive effect on the fitness of wild Atlantic salmon. The degree to which genetic interactions between farmed and wild salmon threaten the latter's persistence almost certainly depends on the degree to which individuals are adapted to their local environment, on the genetic differentiation between farmed and wild individuals, and on the relative proportions of farmed and wild salmon during spawning.</abstract><relatedItem type="host"><titleInfo><title>Journal of Fish Biology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0022-1112</identifier><identifier type="eISSN">1095-8649</identifier><identifier type="DOI">10.1111/(ISSN)1095-8649</identifier><identifier type="PublisherID">JFB</identifier><part><date>2004</date><detail type="volume"><caption>vol.</caption><number>65</number></detail><detail type="supplement"><caption>Suppl. no.</caption><number>s1</number></detail><extent unit="pages"><start>319</start><end>319</end><total>1</total></extent></part></relatedItem><identifier type="istex">AF5C84859B435F51B47CE48F4FB0AEF68270F419</identifier><identifier type="DOI">10.1111/j.0022-1112.2004.0559n.x</identifier><identifier type="ArticleID">JFB559N</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Science Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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