Evidence of autumn spawning in Suwannee River Gulf sturgeon, Acipenser oxyrinchus desotoi (Vladykov, 1955)
Identifieur interne : 000C59 ( Istex/Corpus ); précédent : 000C58; suivant : 000C60Evidence of autumn spawning in Suwannee River Gulf sturgeon, Acipenser oxyrinchus desotoi (Vladykov, 1955)
Auteurs : M. T. Randall ; K. J. SulakSource :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 2012-08.
Abstract
Evidence of autumn spawning of Gulf sturgeon Acipenser oxyrinchus desotoi in the Suwannee River, Florida, was compiled from multiple investigations between 1986 and 2008. Gulf sturgeon are known from egg collections to spawn in the springtime months following immigration into rivers. Evidence of autumn spawning includes multiple captures of sturgeon in September through early November that were ripe (late‐development ova; motile sperm) or exhibited just‐spawned characteristics, telemetry of fish that made >175 river kilometer upstream excursions to the spawning grounds in September–October, and the capture of a 9.3 cm TL age‐0 Gulf sturgeon on 29 November 2000 (which would have been spawned in late September 2000). Analysis of age‐at‐length data indicates that ca. 20% of the Suwannee River Gulf sturgeon population may be attributable to autumn spawning. However, with the very low sampling effort expended, eggs or early life stages have not yet been captured in the autumn, which would be the conclusive proof of autumn spawning. More sampling, and sampling at previously unknown sites frequented by acoustic telemetry fish, would be required to find eggs.
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DOI: 10.1111/j.1439-0426.2012.01960.x
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Gulf sturgeon are known from egg collections to spawn in the springtime months following immigration into rivers. Evidence of autumn spawning includes multiple captures of sturgeon in September through early November that were ripe (late‐development ova; motile sperm) or exhibited just‐spawned characteristics, telemetry of fish that made >175 river kilometer upstream excursions to the spawning grounds in September–October, and the capture of a 9.3 cm TL age‐0 Gulf sturgeon on 29 November 2000 (which would have been spawned in late September 2000). Analysis of age‐at‐length data indicates that ca. 20% of the Suwannee River Gulf sturgeon population may be attributable to autumn spawning. However, with the very low sampling effort expended, eggs or early life stages have not yet been captured in the autumn, which would be the conclusive proof of autumn spawning. More sampling, and sampling at previously unknown sites frequented by acoustic telemetry fish, would be required to find eggs.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>M. T. Randall</name><affiliations><json:string>Southeast Ecological Science Center, U.S. Geological Survey, Gainesville, FL, USA</json:string></affiliations></json:item><json:item><name>K. J. Sulak</name><affiliations><json:string>Southeast Ecological Science Center, U.S. Geological Survey, Gainesville, FL, USA</json:string></affiliations></json:item></author><articleId><json:string>JAI1960</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Evidence of autumn spawning of Gulf sturgeon Acipenser oxyrinchus desotoi in the Suwannee River, Florida, was compiled from multiple investigations between 1986 and 2008. 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E‐mail: <email>mrandall@usgs.gov</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:JAI.JAI1960.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received: May 20, 2011 Accepted: January 6, 2012</unparsedEditorialHistory><countGroup><count type="figureTotal" number="3"></count><count type="tableTotal" number="2"></count></countGroup><titleGroup><title type="main">Evidence of autumn spawning in Suwannee River Gulf sturgeon, <i>Acipenser oxyrinchus desotoi</i> (Vladykov, 1955)</title><title type="shortAuthors">M. T. Randall and K. J. Sulak</title><title type="short">Autumn spawning of Gulf sturgeon, Suwannee River, FL</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#aff-1-1"><personName><givenNames>M. T.</givenNames><familyName>Randall</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#aff-1-1"><personName><givenNames>K. J.</givenNames><familyName>Sulak</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="aff-1-1" countryCode="US"><unparsedAffiliation>Southeast Ecological Science Center, U.S. Geological Survey, Gainesville, FL, USA</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Summary</title><p>Evidence of autumn spawning of Gulf sturgeon <i>Acipenser oxyrinchus desotoi</i> in the Suwannee River, Florida, was compiled from multiple investigations between 1986 and 2008. Gulf sturgeon are known from egg collections to spawn in the springtime months following immigration into rivers. Evidence of autumn spawning includes multiple captures of sturgeon in September through early November that were ripe (late‐development ova; motile sperm) or exhibited just‐spawned characteristics, telemetry of fish that made >175 river kilometer upstream excursions to the spawning grounds in September–October, and the capture of a 9.3 cm TL age‐0 Gulf sturgeon on 29 November 2000 (which would have been spawned in late September 2000). Analysis of age‐at‐length data indicates that ca. 20% of the Suwannee River Gulf sturgeon population may be attributable to autumn spawning. However, with the very low sampling effort expended, eggs or early life stages have not yet been captured in the autumn, which would be the conclusive proof of autumn spawning. More sampling, and sampling at previously unknown sites frequented by acoustic telemetry fish, would be required to find eggs.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Evidence of autumn spawning in Suwannee River Gulf sturgeon, Acipenser oxyrinchus desotoi (Vladykov, 1955)</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Autumn spawning of Gulf sturgeon, Suwannee River, FL</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Evidence of autumn spawning in Suwannee River Gulf sturgeon, Acipenser oxyrinchus desotoi (Vladykov, 1955)</title></titleInfo><name type="personal"><namePart type="given">M. 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Gulf sturgeon are known from egg collections to spawn in the springtime months following immigration into rivers. Evidence of autumn spawning includes multiple captures of sturgeon in September through early November that were ripe (late‐development ova; motile sperm) or exhibited just‐spawned characteristics, telemetry of fish that made >175 river kilometer upstream excursions to the spawning grounds in September–October, and the capture of a 9.3 cm TL age‐0 Gulf sturgeon on 29 November 2000 (which would have been spawned in late September 2000). Analysis of age‐at‐length data indicates that ca. 20% of the Suwannee River Gulf sturgeon population may be attributable to autumn spawning. However, with the very low sampling effort expended, eggs or early life stages have not yet been captured in the autumn, which would be the conclusive proof of autumn spawning. More sampling, and sampling at previously unknown sites frequented by acoustic telemetry fish, would be required to find eggs.</abstract><relatedItem type="host"><titleInfo><title>Journal of Applied Ichthyology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0175-8659</identifier><identifier type="eISSN">1439-0426</identifier><identifier type="DOI">10.1111/(ISSN)1439-0426</identifier><identifier type="PublisherID">JAI</identifier><part><date>2012</date><detail type="volume"><caption>vol.</caption><number>28</number></detail><detail type="issue"><caption>no.</caption><number>4</number></detail><extent unit="pages"><start>489</start><end>495</end><total>7</total></extent></part></relatedItem><identifier type="istex">77B3B8D3DB05575CF09FB4D89D0B08052233CC16</identifier><identifier type="DOI">10.1111/j.1439-0426.2012.01960.x</identifier><identifier type="ArticleID">JAI1960</identifier><accessCondition type="use and reproduction" contentType="copyright">Published 2012. This article is a U.S. Government work and is in the Public domain in the USA</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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