Status and conservation of the giant European freshwater pearl mussel ( Margaritifera auricularia ) (Spengler, 1793) (Bivalvia: Unionoidea)
Identifieur interne : 000C49 ( Istex/Corpus ); précédent : 000C48; suivant : 000C50Status and conservation of the giant European freshwater pearl mussel ( Margaritifera auricularia ) (Spengler, 1793) (Bivalvia: Unionoidea)
Auteurs : R. Araujo ; M. A. RamosSource :
- Biological Conservation [ 0006-3207 ] ; 2000.
English descriptors
Abstract
The geographic range of the freshwater naiad Margaritifera auricularia has declined alarmingly since the beginning of the 20th century. The last records of live specimens date from 1933, and this species was thought to be extinct until 1996 when the authors found a population of about 2000 mussels in a channel of the Ebro River basin (Spain). The habitat, biology and host fish of the species are here described for the first time. The habitat is a well oxygenated, subsaline and oligo-mesotrophic water with high values of calcium (150 mg/l) where M. auricularia shows a patchy distribution in a substrate of pebbles, gravels and sand. In aquarium experiments all individuals released glochidia and developing embryos during 35 days (February–March), the former becoming attached to the gill filaments of the sturgeon (Accipenser baeri) 1 day after emission. One month later, at a temperature of 16–20°C, metamorphosed juveniles were obtained from induced infestations on the sturgeons. We review the current situation of this population and measures that should be urgently implemented to conserve this species through conservation of the habitat (Canal Imperial de Aragón) and long term programmes of artificial propagation.
Url:
DOI: 10.1016/S0006-3207(00)00075-6
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ISTEX:63AB8DEC6497A94CF78848BCF207B5B4533DAA37Le document en format XML
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The last records of live specimens date from 1933, and this species was thought to be extinct until 1996 when the authors found a population of about 2000 mussels in a channel of the Ebro River basin (Spain). The habitat, biology and host fish of the species are here described for the first time. The habitat is a well oxygenated, subsaline and oligo-mesotrophic water with high values of calcium (150 mg/l) where M. auricularia shows a patchy distribution in a substrate of pebbles, gravels and sand. In aquarium experiments all individuals released glochidia and developing embryos during 35 days (February–March), the former becoming attached to the gill filaments of the sturgeon (Accipenser baeri) 1 day after emission. One month later, at a temperature of 16–20°C, metamorphosed juveniles were obtained from induced infestations on the sturgeons. We review the current situation of this population and measures that should be urgently implemented to conserve this species through conservation of the habitat (Canal Imperial de Aragón) and long term programmes of artificial propagation.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>R. Araujo</name><affiliations><json:string>Museo Nacional de Ciencias Naturales (C.S.I.C.), José Gutiérrez Abascal 2, 28006 Madrid, Spain</json:string><json:string>E-mail: rafael@mncn.csic.es</json:string></affiliations></json:item><json:item><name>M.A. Ramos</name><affiliations><json:string>Museo Nacional de Ciencias Naturales (C.S.I.C.), José Gutiérrez Abascal 2, 28006 Madrid, Spain</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Margaritifera auricularia</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Conservation</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Freshwater pearl mussels</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Ebro basin</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Spain</value></json:item></subject><articleId><json:string>1344</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>The geographic range of the freshwater naiad Margaritifera auricularia has declined alarmingly since the beginning of the 20th century. The last records of live specimens date from 1933, and this species was thought to be extinct until 1996 when the authors found a population of about 2000 mussels in a channel of the Ebro River basin (Spain). The habitat, biology and host fish of the species are here described for the first time. The habitat is a well oxygenated, subsaline and oligo-mesotrophic water with high values of calcium (150 mg/l) where M. auricularia shows a patchy distribution in a substrate of pebbles, gravels and sand. In aquarium experiments all individuals released glochidia and developing embryos during 35 days (February–March), the former becoming attached to the gill filaments of the sturgeon (Accipenser baeri) 1 day after emission. One month later, at a temperature of 16–20°C, metamorphosed juveniles were obtained from induced infestations on the sturgeons. We review the current situation of this population and measures that should be urgently implemented to conserve this species through conservation of the habitat (Canal Imperial de Aragón) and long term programmes of artificial propagation.</abstract><qualityIndicators><score>6.875</score><pdfVersion>1.2</pdfVersion><pdfPageSize>595 x 794 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>5</keywordCount><abstractCharCount>1229</abstractCharCount><pdfWordCount>4607</pdfWordCount><pdfCharCount>29188</pdfCharCount><pdfPageCount>7</pdfPageCount><abstractWordCount>189</abstractWordCount></qualityIndicators><title>Status and conservation of the giant European freshwater pearl mussel ( Margaritifera auricularia ) (Spengler, 1793) (Bivalvia: Unionoidea)</title><pii><json:string>S0006-3207(00)00075-6</json:string></pii><genre><json:string>research-article</json:string></genre><host><volume>96</volume><pii><json:string>S0006-3207(00)X0068-7</json:string></pii><pages><last>239</last><first>233</first></pages><issn><json:string>0006-3207</json:string></issn><issue>2</issue><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><title>Biological Conservation</title><publicationDate>2000</publicationDate></host><categories><wos><json:string>science</json:string><json:string>environmental sciences</json:string><json:string>ecology</json:string><json:string>biodiversity conservation</json:string></wos><scienceMetrix><json:string>natural sciences</json:string><json:string>biology</json:string><json:string>ecology</json:string></scienceMetrix></categories><publicationDate>2000</publicationDate><copyrightDate>2000</copyrightDate><doi><json:string>10.1016/S0006-3207(00)00075-6</json:string></doi><id>63AB8DEC6497A94CF78848BCF207B5B4533DAA37</id><score>0.037043437</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/63AB8DEC6497A94CF78848BCF207B5B4533DAA37/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/63AB8DEC6497A94CF78848BCF207B5B4533DAA37/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/63AB8DEC6497A94CF78848BCF207B5B4533DAA37/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Status and conservation of the giant European freshwater pearl mussel ( Margaritifera auricularia ) (Spengler, 1793) (Bivalvia: Unionoidea)</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©2000 Elsevier Science Ltd</p></availability><date>2000</date></publicationStmt><notesStmt><note type="content">Fig. 1: Map of the Canal Imperial, in north east Spain.</note><note type="content">Fig. 2: Size frequencies structure of the Margaritifera auricularia population.</note><note type="content">Fig. 3: Sturgeon (Acipenser baeri) gill filaments showing encysted larvae (glochidia): (A) 1 h after infestation; (B) 1 month after infestation.</note><note type="content">Table 1: Particle size analysis (%) of substrate at the Canal Imperial where Margaritifera auricularia is very abundant (A and B), rare (C) and lacking (D)</note><note type="content">Table 2: Physico-chemical analyses of the water at the site of the richest population of Margaritifera auricularia at low water level (26 February 1997) and high water level (7 March 1997)</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Status and conservation of the giant European freshwater pearl mussel ( Margaritifera auricularia ) (Spengler, 1793) (Bivalvia: Unionoidea)</title><author xml:id="author-1"><persName><forename type="first">R.</forename><surname>Araujo</surname></persName><email>rafael@mncn.csic.es</email><note type="correspondence"><p>Corresponding author. Tel.: +34-914-111-328; fax: 34-915-645-078</p></note><affiliation>Museo Nacional de Ciencias Naturales (C.S.I.C.), José Gutiérrez Abascal 2, 28006 Madrid, Spain</affiliation></author><author xml:id="author-2"><persName><forename type="first">M.A.</forename><surname>Ramos</surname></persName><affiliation>Museo Nacional de Ciencias Naturales (C.S.I.C.), José Gutiérrez Abascal 2, 28006 Madrid, Spain</affiliation></author></analytic><monogr><title level="j">Biological Conservation</title><title level="j" type="abbrev">BIOC</title><idno type="pISSN">0006-3207</idno><idno type="PII">S0006-3207(00)X0068-7</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2000"></date><biblScope unit="volume">96</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="233">233</biblScope><biblScope unit="page" to="239">239</biblScope></imprint></monogr><idno type="istex">63AB8DEC6497A94CF78848BCF207B5B4533DAA37</idno><idno type="DOI">10.1016/S0006-3207(00)00075-6</idno><idno type="PII">S0006-3207(00)00075-6</idno><idno type="ArticleID">1344</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2000</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The geographic range of the freshwater naiad Margaritifera auricularia has declined alarmingly since the beginning of the 20th century. The last records of live specimens date from 1933, and this species was thought to be extinct until 1996 when the authors found a population of about 2000 mussels in a channel of the Ebro River basin (Spain). The habitat, biology and host fish of the species are here described for the first time. The habitat is a well oxygenated, subsaline and oligo-mesotrophic water with high values of calcium (150 mg/l) where M. auricularia shows a patchy distribution in a substrate of pebbles, gravels and sand. In aquarium experiments all individuals released glochidia and developing embryos during 35 days (February–March), the former becoming attached to the gill filaments of the sturgeon (Accipenser baeri) 1 day after emission. One month later, at a temperature of 16–20°C, metamorphosed juveniles were obtained from induced infestations on the sturgeons. We review the current situation of this population and measures that should be urgently implemented to conserve this species through conservation of the habitat (Canal Imperial de Aragón) and long term programmes of artificial propagation.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Margaritifera auricularia</term></item><item><term>Conservation</term></item><item><term>Freshwater pearl mussels</term></item><item><term>Ebro basin</term></item><item><term>Spain</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2000-05-02">Modified</change><change when="2000">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/63AB8DEC6497A94CF78848BCF207B5B4533DAA37/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="UTF-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="gr1" NDATA="IMAGE" name="gr1"></istex:entity><istex:entity SYSTEM="gr2" NDATA="IMAGE" name="gr2"></istex:entity><istex:entity SYSTEM="gr3" NDATA="IMAGE" name="gr3"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>BIOC</jid><aid>1344</aid><ce:pii>S0006-3207(00)00075-6</ce:pii><ce:doi>10.1016/S0006-3207(00)00075-6</ce:doi><ce:copyright type="full-transfer" year="2000">Elsevier Science Ltd</ce:copyright></item-info><head><ce:title>Status and conservation of the giant European freshwater pearl mussel (<ce:italic>Margaritifera auricularia</ce:italic>) (Spengler, 1793) (Bivalvia: Unionoidea)</ce:title><ce:author-group><ce:author><ce:given-name>R.</ce:given-name><ce:surname>Araujo</ce:surname><ce:cross-ref refid="CORR1">*</ce:cross-ref><ce:e-address type="email">rafael@mncn.csic.es</ce:e-address></ce:author><ce:author><ce:given-name>M.A.</ce:given-name><ce:surname>Ramos</ce:surname></ce:author><ce:affiliation><ce:textfn>Museo Nacional de Ciencias Naturales (C.S.I.C.), José Gutiérrez Abascal 2, 28006 Madrid, Spain</ce:textfn></ce:affiliation><ce:correspondence id="CORR1"><ce:label>*</ce:label><ce:text>Corresponding author. Tel.: +34-914-111-328; fax: 34-915-645-078</ce:text></ce:correspondence></ce:author-group><ce:date-received day="26" month="11" year="1999"></ce:date-received><ce:date-revised day="2" month="5" year="2000"></ce:date-revised><ce:date-accepted day="4" month="5" year="2000"></ce:date-accepted><ce:abstract class="author"><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para view="all" id="simple-para.0035">The geographic range of the freshwater naiad <ce:italic>Margaritifera auricularia</ce:italic> has declined alarmingly since the beginning of the 20th century. The last records of live specimens date from 1933, and this species was thought to be extinct until 1996 when the authors found a population of about 2000 mussels in a channel of the Ebro River basin (Spain). The habitat, biology and host fish of the species are here described for the first time. The habitat is a well oxygenated, subsaline and oligo-mesotrophic water with high values of calcium (150 mg/l) where <ce:italic>M. auricularia</ce:italic> shows a patchy distribution in a substrate of pebbles, gravels and sand. In aquarium experiments all individuals released glochidia and developing embryos during 35 days (February–March), the former becoming attached to the gill filaments of the sturgeon (<ce:italic>Accipenser baeri</ce:italic>) 1 day after emission. One month later, at a temperature of 16–20°C, metamorphosed juveniles were obtained from induced infestations on the sturgeons. We review the current situation of this population and measures that should be urgently implemented to conserve this species through conservation of the habitat (Canal Imperial de Aragón) and long term programmes of artificial propagation.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text><ce:italic>Margaritifera auricularia</ce:italic></ce:text></ce:keyword><ce:keyword><ce:text>Conservation</ce:text></ce:keyword><ce:keyword><ce:text>Freshwater pearl mussels</ce:text></ce:keyword><ce:keyword><ce:text>Ebro basin</ce:text></ce:keyword><ce:keyword><ce:text>Spain</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Status and conservation of the giant European freshwater pearl mussel ( Margaritifera auricularia ) (Spengler, 1793) (Bivalvia: Unionoidea)</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Status and conservation of the giant European freshwater pearl mussel (</title></titleInfo><name type="personal"><namePart type="given">R.</namePart><namePart type="family">Araujo</namePart><affiliation>Museo Nacional de Ciencias Naturales (C.S.I.C.), José Gutiérrez Abascal 2, 28006 Madrid, Spain</affiliation><affiliation>E-mail: rafael@mncn.csic.es</affiliation><description>Corresponding author. Tel.: +34-914-111-328; fax: 34-915-645-078</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.A.</namePart><namePart type="family">Ramos</namePart><affiliation>Museo Nacional de Ciencias Naturales (C.S.I.C.), José Gutiérrez Abascal 2, 28006 Madrid, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">2000</dateIssued><dateModified encoding="w3cdtf">2000-05-02</dateModified><copyrightDate encoding="w3cdtf">2000</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The geographic range of the freshwater naiad Margaritifera auricularia has declined alarmingly since the beginning of the 20th century. The last records of live specimens date from 1933, and this species was thought to be extinct until 1996 when the authors found a population of about 2000 mussels in a channel of the Ebro River basin (Spain). The habitat, biology and host fish of the species are here described for the first time. The habitat is a well oxygenated, subsaline and oligo-mesotrophic water with high values of calcium (150 mg/l) where M. auricularia shows a patchy distribution in a substrate of pebbles, gravels and sand. In aquarium experiments all individuals released glochidia and developing embryos during 35 days (February–March), the former becoming attached to the gill filaments of the sturgeon (Accipenser baeri) 1 day after emission. One month later, at a temperature of 16–20°C, metamorphosed juveniles were obtained from induced infestations on the sturgeons. We review the current situation of this population and measures that should be urgently implemented to conserve this species through conservation of the habitat (Canal Imperial de Aragón) and long term programmes of artificial propagation.</abstract><note type="content">Fig. 1: Map of the Canal Imperial, in north east Spain.</note><note type="content">Fig. 2: Size frequencies structure of the Margaritifera auricularia population.</note><note type="content">Fig. 3: Sturgeon (Acipenser baeri) gill filaments showing encysted larvae (glochidia): (A) 1 h after infestation; (B) 1 month after infestation.</note><note type="content">Table 1: Particle size analysis (%) of substrate at the Canal Imperial where Margaritifera auricularia is very abundant (A and B), rare (C) and lacking (D)</note><note type="content">Table 2: Physico-chemical analyses of the water at the site of the richest population of Margaritifera auricularia at low water level (26 February 1997) and high water level (7 March 1997)</note><subject lang="en"><genre>Keywords</genre><topic>Margaritifera auricularia</topic><topic>Conservation</topic><topic>Freshwater pearl mussels</topic><topic>Ebro basin</topic><topic>Spain</topic></subject><relatedItem type="host"><titleInfo><title>Biological Conservation</title></titleInfo><titleInfo type="abbreviated"><title>BIOC</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">200012</dateIssued></originInfo><identifier type="ISSN">0006-3207</identifier><identifier type="PII">S0006-3207(00)X0068-7</identifier><part><date>200012</date><detail type="volume"><number>96</number><caption>vol.</caption></detail><detail type="issue"><number>2</number><caption>no.</caption></detail><extent unit="issue pages"><start>133</start><end>262</end></extent><extent unit="pages"><start>233</start><end>239</end></extent></part></relatedItem><identifier type="istex">63AB8DEC6497A94CF78848BCF207B5B4533DAA37</identifier><identifier type="DOI">10.1016/S0006-3207(00)00075-6</identifier><identifier type="PII">S0006-3207(00)00075-6</identifier><identifier type="ArticleID">1344</identifier><accessCondition type="use and reproduction" contentType="copyright">©2000 Elsevier Science Ltd</accessCondition><recordInfo><recordContentSource>ELSEVIER</recordContentSource><recordOrigin>Elsevier Science Ltd, ©2000</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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