The assessment of fish vulnerability in Switzerland based on distribution data
Identifieur interne : 000C56 ( Istex/Corpus ); précédent : 000C55; suivant : 000C57The assessment of fish vulnerability in Switzerland based on distribution data
Auteurs : Arthur KirchhoferSource :
- Biological Conservation [ 0006-3207 ] ; 1997.
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- KwdEn :
Abstract
A nationwide study on the distribution of the fish fauna served as the basis for a vulnerability assessment of fish and cyclostomes in Switzerland. In all, 1900 river sections and 249 lakes were sampled in several stages using various methods. In 941 of these sampling sites fish were present with 1–37 taxa. The vulnerability of each taxon was assessed using the relationship between the numbers of actual occurrences, extinct populations, present population sizes and population stability. Each of these variables was transformed to respond in the form ‘lower value = higher threat’, and then all were summed to give a ‘vulnerability score’. This gave a standardised preliminary classification into five categories for 43 of the total 54 native taxa. However, further criteria not covered by the quantitative distribution data, such as zoogeography and fishery management, had to be included for several taxa in the final allocation of conservation status. In the resulting Red List, seven taxa are listed as extinct, five as critical, eight as endangered, eight as vulnerable and 14 as susceptible. Twelve native taxa are considered as not threatened, and for 13 introduced taxa no conservation status was assigned.
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DOI: 10.1016/S0006-3207(96)00099-7
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ISTEX:6755718EC1B17BF60C25825373A1414FB2B1B8FBLe document en format XML
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In all, 1900 river sections and 249 lakes were sampled in several stages using various methods. In 941 of these sampling sites fish were present with 1–37 taxa. The vulnerability of each taxon was assessed using the relationship between the numbers of actual occurrences, extinct populations, present population sizes and population stability. Each of these variables was transformed to respond in the form ‘lower value = higher threat’, and then all were summed to give a ‘vulnerability score’. This gave a standardised preliminary classification into five categories for 43 of the total 54 native taxa. However, further criteria not covered by the quantitative distribution data, such as zoogeography and fishery management, had to be included for several taxa in the final allocation of conservation status. In the resulting Red List, seven taxa are listed as extinct, five as critical, eight as endangered, eight as vulnerable and 14 as susceptible. 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Kirchhofer, Institute of Zoology, University of Bern, Baltzerstrasse 3, CH-3012 Bern, Switzerland. Tel.: +41 31 631 45 11; Fax: +41 31 631 48 88</p></note><affiliation>Institute of Zoology, University of Bern, Baltzerstrasse 3, CH-3012 Bern, Switzerland</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)X0021-3</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1997"></date><biblScope unit="volume">80</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="1">1</biblScope><biblScope unit="page" to="8">8</biblScope></imprint></monogr><idno type="istex">6755718EC1B17BF60C25825373A1414FB2B1B8FB</idno><idno type="DOI">10.1016/S0006-3207(96)00099-7</idno><idno type="PII">S0006-3207(96)00099-7</idno><idno type="ArticleID">96000997</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1997</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>A nationwide study on the distribution of the fish fauna served as the basis for a vulnerability assessment of fish and cyclostomes in Switzerland. In all, 1900 river sections and 249 lakes were sampled in several stages using various methods. In 941 of these sampling sites fish were present with 1–37 taxa. The vulnerability of each taxon was assessed using the relationship between the numbers of actual occurrences, extinct populations, present population sizes and population stability. Each of these variables was transformed to respond in the form ‘lower value = higher threat’, and then all were summed to give a ‘vulnerability score’. This gave a standardised preliminary classification into five categories for 43 of the total 54 native taxa. However, further criteria not covered by the quantitative distribution data, such as zoogeography and fishery management, had to be included for several taxa in the final allocation of conservation status. In the resulting Red List, seven taxa are listed as extinct, five as critical, eight as endangered, eight as vulnerable and 14 as susceptible. Twelve native taxa are considered as not threatened, and for 13 introduced taxa no conservation status was assigned.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>fish</term></item><item><term>cyclostomes</term></item><item><term>vulnerability</term></item><item><term>distribution</term></item><item><term>red list</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1997">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/6755718EC1B17BF60C25825373A1414FB2B1B8FB/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: 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:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>BIOC</jid><aid>96000997</aid><ce:pii>S0006-3207(96)00099-7</ce:pii><ce:doi>10.1016/S0006-3207(96)00099-7</ce:doi><ce:copyright type="unknown" year="1997"></ce:copyright></item-info><head><ce:title>The assessment of fish vulnerability in Switzerland based on distribution data</ce:title><ce:author-group><ce:author><ce:given-name>Arthur</ce:given-name><ce:surname>Kirchhofer</ce:surname><ce:cross-ref refid="COR1"><ce:sup loc="post">∗</ce:sup></ce:cross-ref><ce:e-address type="email">kirchhofer@zos.unibe.ch</ce:e-address></ce:author><ce:affiliation><ce:textfn>Institute of Zoology, University of Bern, Baltzerstrasse 3, CH-3012 Bern, Switzerland</ce:textfn></ce:affiliation><ce:correspondence id="COR1"><ce:label>∗</ce:label><ce:text>Correspondence to: A. Kirchhofer, Institute of Zoology, University of Bern, Baltzerstrasse 3, CH-3012 Bern, Switzerland. Tel.: +41 31 631 45 11; Fax: +41 31 631 48 88</ce:text></ce:correspondence></ce:author-group><ce:date-received day="31" month="5" year="1994"></ce:date-received><ce:date-accepted day="26" month="4" year="1996"></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.0010">A nationwide study on the distribution of the fish fauna served as the basis for a vulnerability assessment of fish and cyclostomes in Switzerland. In all, 1900 river sections and 249 lakes were sampled in several stages using various methods. In 941 of these sampling sites fish were present with 1–37 taxa. The vulnerability of each taxon was assessed using the relationship between the numbers of actual occurrences, extinct populations, present population sizes and population stability. Each of these variables was transformed to respond in the form ‘lower value = higher threat’, and then all were summed to give a ‘vulnerability score’. This gave a standardised preliminary classification into five categories for 43 of the total 54 native taxa. However, further criteria not covered by the quantitative distribution data, such as zoogeography and fishery management, had to be included for several taxa in the final allocation of conservation status. In the resulting Red List, seven taxa are listed as extinct, five as critical, eight as endangered, eight as vulnerable and 14 as susceptible. Twelve native taxa are considered as not threatened, and for 13 introduced taxa no conservation status was assigned.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>fish</ce:text></ce:keyword><ce:keyword><ce:text>cyclostomes</ce:text></ce:keyword><ce:keyword><ce:text>vulnerability</ce:text></ce:keyword><ce:keyword><ce:text>distribution</ce:text></ce:keyword><ce:keyword><ce:text>red list</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>The assessment of fish vulnerability in Switzerland based on distribution data</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>The assessment of fish vulnerability in Switzerland based on distribution data</title></titleInfo><name type="personal"><namePart type="given">Arthur</namePart><namePart type="family">Kirchhofer</namePart><affiliation>Institute of Zoology, University of Bern, Baltzerstrasse 3, CH-3012 Bern, Switzerland</affiliation><affiliation>E-mail: kirchhofer@zos.unibe.ch</affiliation><description>Correspondence to: A. Kirchhofer, Institute of Zoology, University of Bern, Baltzerstrasse 3, CH-3012 Bern, Switzerland. Tel.: +41 31 631 45 11; Fax: +41 31 631 48 88</description><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">1997</dateIssued><copyrightDate encoding="w3cdtf">1997</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">A nationwide study on the distribution of the fish fauna served as the basis for a vulnerability assessment of fish and cyclostomes in Switzerland. In all, 1900 river sections and 249 lakes were sampled in several stages using various methods. In 941 of these sampling sites fish were present with 1–37 taxa. The vulnerability of each taxon was assessed using the relationship between the numbers of actual occurrences, extinct populations, present population sizes and population stability. Each of these variables was transformed to respond in the form ‘lower value = higher threat’, and then all were summed to give a ‘vulnerability score’. This gave a standardised preliminary classification into five categories for 43 of the total 54 native taxa. However, further criteria not covered by the quantitative distribution data, such as zoogeography and fishery management, had to be included for several taxa in the final allocation of conservation status. In the resulting Red List, seven taxa are listed as extinct, five as critical, eight as endangered, eight as vulnerable and 14 as susceptible. Twelve native taxa are considered as not threatened, and for 13 introduced taxa no conservation status was assigned.</abstract><subject lang="en"><genre>Keywords</genre><topic>fish</topic><topic>cyclostomes</topic><topic>vulnerability</topic><topic>distribution</topic><topic>red list</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">199704</dateIssued></originInfo><identifier type="ISSN">0006-3207</identifier><identifier type="PII">S0006-3207(00)X0021-3</identifier><part><date>199704</date><detail type="volume"><number>80</number><caption>vol.</caption></detail><detail type="issue"><number>1</number><caption>no.</caption></detail><extent unit="issue pages"><start>1</start><end>125</end></extent><extent unit="pages"><start>1</start><end>8</end></extent></part></relatedItem><identifier type="istex">6755718EC1B17BF60C25825373A1414FB2B1B8FB</identifier><identifier type="DOI">10.1016/S0006-3207(96)00099-7</identifier><identifier type="PII">S0006-3207(96)00099-7</identifier><identifier type="ArticleID">96000997</identifier><recordInfo><recordContentSource>ELSEVIER</recordContentSource></recordInfo></mods></metadata></istex></record>Pour manipuler ce document sous Unix (Dilib)
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