Acipenser sturio and Acipenser nudiventris in the Danube – extant or extinct?
Identifieur interne : 000A55 ( Istex/Corpus ); précédent : 000A54; suivant : 000A56Acipenser sturio and Acipenser nudiventris in the Danube – extant or extinct?
Auteurs : I. Jari ; M. Lenhardt ; G. Cvijanovi ; T. EbenhardSource :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 2009-04.
Abstract
The presence of Atlantic sturgeon (Acipenser sturio) and ship sturgeon (Acipenser nudiventris) in the Danube has been known through only occasional, chance sightings; significant uncertainty remains as to whether these species are already extinct or still present in the Danube River basin. In this study, five different statistical methods were applied for assessment of their extinction probability. All methods provided a significant probability that the Atlantic sturgeon is extinct, with extinction having occurred somewhere between 1966 and 1970. Although the applied methods provided different results, all indicated that the ship sturgeon is probably still present, but that extinction may occur within a few decades. Sensitivity analyses of these statistical methods projected that new sightings of ship sturgeon in the coming years would not extend the length of extinction by more than a few years. The best management approach for these two species, given the lack of knowledge on their presence in the Danube River basin, could be to apply all feasible protection measures for the other four Danube sturgeon species. These measures could at the same time provide protection for these two species, presuming they are not already extinct or beyond recovery.
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DOI: 10.1111/j.1439-0426.2009.01227.x
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In this study, five different statistical methods were applied for assessment of their extinction probability. All methods provided a significant probability that the Atlantic sturgeon is extinct, with extinction having occurred somewhere between 1966 and 1970. Although the applied methods provided different results, all indicated that the ship sturgeon is probably still present, but that extinction may occur within a few decades. Sensitivity analyses of these statistical methods projected that new sightings of ship sturgeon in the coming years would not extend the length of extinction by more than a few years. The best management approach for these two species, given the lack of knowledge on their presence in the Danube River basin, could be to apply all feasible protection measures for the other four Danube sturgeon species. 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E‐mail: <email>ijaric@ibiss.bg.ac.yu</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:JAI.JAI1227.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received: June 21, 2008 Accepted: October 2, 2008</unparsedEditorialHistory><countGroup><count type="figureTotal" number="1"></count><count type="tableTotal" number="3"></count></countGroup><titleGroup><title type="main"><i>Acipenser sturio</i> and <i>Acipenser nudiventris</i> in the Danube – extant or extinct?</title><title type="shortAuthors">I. Jarić et al.</title><title type="short">Sturgeon extinctions in the Danube</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>I.</givenNames><familyName>Jarić</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a2"><personName><givenNames>M.</givenNames><familyName>Lenhardt</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a1"><personName><givenNames>G.</givenNames><familyName>Cvijanović</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a3"><personName><givenNames>T.</givenNames><familyName>Ebenhard</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="RS"><unparsedAffiliation>Institute for Multidisciplinary Research, Belgrade, Serbia</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="RS"><unparsedAffiliation>Institute for Biological Research, Belgrade, Serbia</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="SE"><unparsedAffiliation>Swedish Biodiversity Centre (CBM), Uppsala, Sweden</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Summary</title><p>The presence of Atlantic sturgeon (<i>Acipenser sturio)</i> and ship sturgeon (<i>Acipenser nudiventris</i>) in the Danube has been known through only occasional, chance sightings; significant uncertainty remains as to whether these species are already extinct or still present in the Danube River basin. In this study, five different statistical methods were applied for assessment of their extinction probability. All methods provided a significant probability that the Atlantic sturgeon is extinct, with extinction having occurred somewhere between 1966 and 1970. Although the applied methods provided different results, all indicated that the ship sturgeon is probably still present, but that extinction may occur within a few decades. Sensitivity analyses of these statistical methods projected that new sightings of ship sturgeon in the coming years would not extend the length of extinction by more than a few years. The best management approach for these two species, given the lack of knowledge on their presence in the Danube River basin, could be to apply all feasible protection measures for the other four Danube sturgeon species. These measures could at the same time provide protection for these two species, presuming they are not already extinct or beyond recovery.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Acipenser sturio and Acipenser nudiventris in the Danube – extant or extinct?</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Sturgeon extinctions in the Danube</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Acipenser sturio and Acipenser nudiventris in the Danube – extant or extinct?</title></titleInfo><name type="personal"><namePart type="given">I.</namePart><namePart type="family">Jarić</namePart><affiliation>Institute for Multidisciplinary Research, Belgrade, Serbia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Lenhardt</namePart><affiliation>Institute for Biological Research, Belgrade, Serbia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Cvijanović</namePart><affiliation>Institute for Multidisciplinary Research, Belgrade, Serbia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">T.</namePart><namePart type="family">Ebenhard</namePart><affiliation>Swedish Biodiversity Centre (CBM), Uppsala, Sweden</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">2009-04</dateIssued><edition>Received: June 21, 2008 Accepted: October 2, 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">1</extent><extent unit="tables">3</extent></physicalDescription><abstract lang="en">The presence of Atlantic sturgeon (Acipenser sturio) and ship sturgeon (Acipenser nudiventris) in the Danube has been known through only occasional, chance sightings; significant uncertainty remains as to whether these species are already extinct or still present in the Danube River basin. In this study, five different statistical methods were applied for assessment of their extinction probability. All methods provided a significant probability that the Atlantic sturgeon is extinct, with extinction having occurred somewhere between 1966 and 1970. Although the applied methods provided different results, all indicated that the ship sturgeon is probably still present, but that extinction may occur within a few decades. Sensitivity analyses of these statistical methods projected that new sightings of ship sturgeon in the coming years would not extend the length of extinction by more than a few years. The best management approach for these two species, given the lack of knowledge on their presence in the Danube River basin, could be to apply all feasible protection measures for the other four Danube sturgeon species. These measures could at the same time provide protection for these two species, presuming they are not already extinct or beyond recovery.</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>2009</date><detail type="volume"><caption>vol.</caption><number>25</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>137</start><end>141</end><total>7</total></extent></part></relatedItem><identifier type="istex">EF8D70471EF48B2688B545D91B266DA7EE197965</identifier><identifier type="DOI">10.1111/j.1439-0426.2009.01227.x</identifier><identifier type="ArticleID">JAI1227</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2009 The Authors. 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