Acipenser sturio L. in the Guadalquivir river, Spain. Water regulation and fishery as factors in stock decline from 1932 to 1967
Identifieur interne : 000405 ( Istex/Corpus ); précédent : 000404; suivant : 000406Acipenser sturio L. in the Guadalquivir river, Spain. Water regulation and fishery as factors in stock decline from 1932 to 1967
Auteurs : V. Fernández-PasquierSource :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 1999-09.
Abstract
Sturgeon (Acipenser sturio L., 1758) was a common species in the Guadalquivir River until the thirties. In 1932 a dam was built in the spawning area, 100 km from the river's mouth, that interrupted the migration. In the same year, a caviar and sturgeon smoked flesh factory started to run. By that time most of the fishes came to the factory from the dam area, but since 1934 the use of a fishing line without bait, specific for sturgeon catch, enabled fishermen to work in deep holes of the lower estuary. Using data from the factory records, we found that gravid females only got to spawning areas downstream of the dam when the water flow was greater than 100 m3/sec. Increasingly frequent dry weather in spring (caused by droughts and water regulation for flow irrigation) occurred, which led to persistent reproductive failures. During dry springs, it was more likely to catch sturgeons in the lower estuary than in the medium and upper estuarine areas, because fishes remained settled in deep holes, waiting for better water flow to continue their upstream migration. Increasing catches in this area resulted in the elimination of the most potentially reproductive adult fishes before they had any chance to spawn, which has finally led to the virtual extinction of the population.
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DOI: 10.1111/j.1439-0426.1999.tb00222.x
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ISTEX:8F0478D50A47C33B2FE570232488B8E7FC6A9D1ELe document en format XML
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Cadiz, Spain</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:8F0478D50A47C33B2FE570232488B8E7FC6A9D1E</idno><date when="1999" year="1999">1999</date><idno type="doi">10.1111/j.1439-0426.1999.tb00222.x</idno><idno type="url">https://api.istex.fr/document/8F0478D50A47C33B2FE570232488B8E7FC6A9D1E/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000405</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000405</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Acipenser sturio L. in the Guadalquivir river, Spain. Water regulation and fishery as factors in stock decline from 1932 to 1967</title><author><name sortKey="Fernandez Asquier, V" sort="Fernandez Asquier, V" uniqKey="Fernandez Asquier V" first="V." last="Fernández-Pasquier">V. Fernández-Pasquier</name><affiliation><mods:affiliation>P.O. Box287. E‐11540Sanluvcar de Barrameda. 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In 1932 a dam was built in the spawning area, 100 km from the river's mouth, that interrupted the migration. In the same year, a caviar and sturgeon smoked flesh factory started to run. By that time most of the fishes came to the factory from the dam area, but since 1934 the use of a fishing line without bait, specific for sturgeon catch, enabled fishermen to work in deep holes of the lower estuary. Using data from the factory records, we found that gravid females only got to spawning areas downstream of the dam when the water flow was greater than 100 m3/sec. Increasingly frequent dry weather in spring (caused by droughts and water regulation for flow irrigation) occurred, which led to persistent reproductive failures. During dry springs, it was more likely to catch sturgeons in the lower estuary than in the medium and upper estuarine areas, because fishes remained settled in deep holes, waiting for better water flow to continue their upstream migration. Increasing catches in this area resulted in the elimination of the most potentially reproductive adult fishes before they had any chance to spawn, which has finally led to the virtual extinction of the population.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>V. Fernández‐Pasquier</name><affiliations><json:string>P.O. Box287. E‐11540Sanluvcar de Barrameda. Cadiz, Spain</json:string></affiliations></json:item></author><articleId><json:string>JAI133</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Sturgeon (Acipenser sturio L., 1758) was a common species in the Guadalquivir River until the thirties. In 1932 a dam was built in the spawning area, 100 km from the river's mouth, that interrupted the migration. In the same year, a caviar and sturgeon smoked flesh factory started to run. By that time most of the fishes came to the factory from the dam area, but since 1934 the use of a fishing line without bait, specific for sturgeon catch, enabled fishermen to work in deep holes of the lower estuary. Using data from the factory records, we found that gravid females only got to spawning areas downstream of the dam when the water flow was greater than 100 m3/sec. Increasingly frequent dry weather in spring (caused by droughts and water regulation for flow irrigation) occurred, which led to persistent reproductive failures. During dry springs, it was more likely to catch sturgeons in the lower estuary than in the medium and upper estuarine areas, because fishes remained settled in deep holes, waiting for better water flow to continue their upstream migration. 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Water regulation and fishery as factors in stock decline from 1932 to 1967</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>V.</givenNames><familyName>Fernández‐Pasquier</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="ES"><unparsedAffiliation>P.O. Box287. E‐11540Sanluvcar de Barrameda. Cadiz, Spain</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Summary</title><p>Sturgeon (<i>Acipenser sturio</i> L., 1758) was a common species in the Guadalquivir River until the thirties. In 1932 a dam was built in the spawning area, 100 km from the river's mouth, that interrupted the migration. In the same year, a caviar and sturgeon smoked flesh factory started to run. By that time most of the fishes came to the factory from the dam area, but since 1934 the use of a fishing line without bait, specific for sturgeon catch, enabled fishermen to work in deep holes of the lower estuary. Using data from the factory records, we found that gravid females only got to spawning areas downstream of the dam when the water flow was greater than 100 m<sup>3</sup>/sec. Increasingly frequent dry weather in spring (caused by droughts and water regulation for flow irrigation) occurred, which led to persistent reproductive failures. During dry springs, it was more likely to catch sturgeons in the lower estuary than in the medium and upper estuarine areas, because fishes remained settled in deep holes, waiting for better water flow to continue their upstream migration. Increasing catches in this area resulted in the elimination of the most potentially reproductive adult fishes before they had any chance to spawn, which has finally led to the virtual extinction of the population.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Acipenser sturio L. in the Guadalquivir river, Spain. Water regulation and fishery as factors in stock decline from 1932 to 1967</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Acipenser sturio L. in the Guadalquivir river, Spain. Water regulation and fishery as factors in stock decline from 1932 to 1967</title></titleInfo><name type="personal"><namePart type="given">V.</namePart><namePart type="family">Fernández‐Pasquier</namePart><affiliation>P.O. Box287. E‐11540Sanluvcar de Barrameda. Cadiz, Spain</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">1999-09</dateIssued><copyrightDate encoding="w3cdtf">1999</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="references">17</extent></physicalDescription><abstract lang="en">Sturgeon (Acipenser sturio L., 1758) was a common species in the Guadalquivir River until the thirties. In 1932 a dam was built in the spawning area, 100 km from the river's mouth, that interrupted the migration. In the same year, a caviar and sturgeon smoked flesh factory started to run. By that time most of the fishes came to the factory from the dam area, but since 1934 the use of a fishing line without bait, specific for sturgeon catch, enabled fishermen to work in deep holes of the lower estuary. Using data from the factory records, we found that gravid females only got to spawning areas downstream of the dam when the water flow was greater than 100 m3/sec. Increasingly frequent dry weather in spring (caused by droughts and water regulation for flow irrigation) occurred, which led to persistent reproductive failures. During dry springs, it was more likely to catch sturgeons in the lower estuary than in the medium and upper estuarine areas, because fishes remained settled in deep holes, waiting for better water flow to continue their upstream migration. Increasing catches in this area resulted in the elimination of the most potentially reproductive adult fishes before they had any chance to spawn, which has finally led to the virtual extinction of the population.</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>1999</date><detail type="volume"><caption>vol.</caption><number>15</number></detail><detail type="issue"><caption>no.</caption><number>4‐5</number></detail><extent unit="pages"><start>133</start><end>135</end><total>3</total></extent></part></relatedItem><identifier type="istex">8F0478D50A47C33B2FE570232488B8E7FC6A9D1E</identifier><identifier type="DOI">10.1111/j.1439-0426.1999.tb00222.x</identifier><identifier type="ArticleID">JAI133</identifier><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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