Estuarine phase during seaward migration for allis shad Alosa alosa and twaite shad Alosa fallax future spawners
Identifieur interne : 000B91 ( Istex/Corpus ); précédent : 000B90; suivant : 000B92Estuarine phase during seaward migration for allis shad Alosa alosa and twaite shad Alosa fallax future spawners
Auteurs : A. Lochet ; S. Boutry ; E. RochardSource :
- Ecology of Freshwater Fish [ 0906-6691 ] ; 2009-06.
English descriptors
Abstract
Abstract – The timing and duration of the estuarine phase during seaward migration were addressed for allis shad and twaite shad, closely related sympatric species in the Gironde system. Otolith Sr:Ca and daily growth increments were used to retrospectively estimate the age at entrance in the estuary, the time spent in estuary and the age at seaward exit from returning adults. The two species exhibited different seaward migration strategies: allis shad entered the estuary at an older age than twaite shad (88 days vs. 59 days), stayed shorter in the estuary (11 days vs. 17 days) and exited to the sea at an older age (99 days vs. 77 days). In the Gironde system, the estuarine phase is very short and occurs within a particular time ‘window’ for the juveniles that will become future spawners. In this context, it might be suggested that the estuarine phase is a bottleneck for these sympatric shad populations.
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DOI: 10.1111/j.1600-0633.2008.00350.x
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Otolith Sr:Ca and daily growth increments were used to retrospectively estimate the age at entrance in the estuary, the time spent in estuary and the age at seaward exit from returning adults. The two species exhibited different seaward migration strategies: allis shad entered the estuary at an older age than twaite shad (88 days vs. 59 days), stayed shorter in the estuary (11 days vs. 17 days) and exited to the sea at an older age (99 days vs. 77 days). In the Gironde system, the estuarine phase is very short and occurs within a particular time ‘window’ for the juveniles that will become future spawners. In this context, it might be suggested that the estuarine phase is a bottleneck for these sympatric shad populations.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>A. Lochet</name><affiliations><json:string>Cemagref, UR EPBX</json:string></affiliations></json:item><json:item><name>S. 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Journal compilation © 2009 Blackwell Munksgaard</copyright><eventGroup><event type="firstOnline" date="2009-02-01"></event><event type="publishedOnlineFinalForm" date="2009-05-15"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.2 mode:FullText source:FullText result:FullText" date="2010-03-06"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-24"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-16"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="323">323</numbering><numbering type="pageLast" number="335">335</numbering></numberingGroup><correspondenceTo>A. Lochet, Cemagref, UR EPBX, 50 avenue de Verdun, F‐33612 Cestas Cedex, France; e‐mail: <email>aude.lochet@cemagref.fr</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:EFF.EFF350.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Accepted for publication December 20, 2008</unparsedEditorialHistory><countGroup><count type="figureTotal" number="5"></count><count type="tableTotal" number="1"></count></countGroup><titleGroup><title type="main">Estuarine phase during seaward migration for allis shad <i>Alosa alosa</i> and twaite shad <i>Alosa fallax</i> future spawners</title><title type="shortAuthors"><b>Lochet et al.</b></title><title type="short"><b>Downstream migration and survival of allis shad and twaite shad</b></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>A.</givenNames><familyName>Lochet</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a2"><personName><givenNames>S.</givenNames><familyName>Boutry</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a1"><personName><givenNames>E.</givenNames><familyName>Rochard</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1"><unparsedAffiliation>Cemagref, UR EPBX</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="FR"><unparsedAffiliation>Cemagref, UR REBX, Cestas Cedex, France</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">estuary</keyword><keyword xml:id="k2">survival</keyword><keyword xml:id="k3">juveniles</keyword><keyword xml:id="k4">migration pattern</keyword><keyword xml:id="k5">shad</keyword><keyword xml:id="k6">otolith</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><!-- Lochet A, Boutry S, Rochard E. Estuarine phase during seaward migration for allis shad Alosa alosa and twaite shad Alosa fallax future spawners.
Ecology of Freshwater Fish 2009: 18: 323–335. © 2009 The Authors. Journal compilation © 2009 Blackwell Munksgaard --><p><b>Abstract – </b> The timing and duration of the estuarine phase during seaward migration were addressed for allis shad and twaite shad, closely related sympatric species in the Gironde system. Otolith Sr:Ca and daily growth increments were used to retrospectively estimate the age at entrance in the estuary, the time spent in estuary and the age at seaward exit from returning adults. The two species exhibited different seaward migration strategies: allis shad entered the estuary at an older age than twaite shad (88 days vs. 59 days), stayed shorter in the estuary (11 days vs. 17 days) and exited to the sea at an older age (99 days vs. 77 days). In the Gironde system, the estuarine phase is very short and occurs within a particular time ‘window’ for the juveniles that will become future spawners. In this context, it might be suggested that the estuarine phase is a bottleneck for these sympatric shad populations.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Estuarine phase during seaward migration for allis shad Alosa alosa and twaite shad Alosa fallax future spawners</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Downstream migration and survival of allis shad and twaite shad</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Estuarine phase during seaward migration for allis shad Alosa alosa and twaite shad Alosa fallax future spawners</title></titleInfo><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Lochet</namePart><affiliation>Cemagref, UR EPBX</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Boutry</namePart><affiliation>Cemagref, UR REBX, Cestas Cedex, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Rochard</namePart><affiliation>Cemagref, UR EPBX</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2009-06</dateIssued><edition>Accepted for publication December 20, 2008</edition><copyrightDate encoding="w3cdtf">2009</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">5</extent><extent unit="tables">1</extent></physicalDescription><abstract>Abstract – The timing and duration of the estuarine phase during seaward migration were addressed for allis shad and twaite shad, closely related sympatric species in the Gironde system. Otolith Sr:Ca and daily growth increments were used to retrospectively estimate the age at entrance in the estuary, the time spent in estuary and the age at seaward exit from returning adults. The two species exhibited different seaward migration strategies: allis shad entered the estuary at an older age than twaite shad (88 days vs. 59 days), stayed shorter in the estuary (11 days vs. 17 days) and exited to the sea at an older age (99 days vs. 77 days). In the Gironde system, the estuarine phase is very short and occurs within a particular time ‘window’ for the juveniles that will become future spawners. In this context, it might be suggested that the estuarine phase is a bottleneck for these sympatric shad populations.</abstract><subject lang="en"><genre>keywords</genre><topic>estuary</topic><topic>survival</topic><topic>juveniles</topic><topic>migration pattern</topic><topic>shad</topic><topic>otolith</topic></subject><relatedItem type="host"><titleInfo><title>Ecology of Freshwater Fish</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0906-6691</identifier><identifier type="eISSN">1600-0633</identifier><identifier type="DOI">10.1111/(ISSN)1600-0633</identifier><identifier type="PublisherID">EFF</identifier><part><date>2009</date><detail type="volume"><caption>vol.</caption><number>18</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>323</start><end>335</end><total>13</total></extent></part></relatedItem><identifier type="istex">0841C24524C125C43462AA76AF9D9CCD70D2AA67</identifier><identifier type="DOI">10.1111/j.1600-0633.2008.00350.x</identifier><identifier type="ArticleID">EFF350</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2009 The Authors. 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