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                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : CGFS2009</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : CGFS2009</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/10050080</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : CGFS2010</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : CGFS2010</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/5040080</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : EVHOE 2005</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : EVHOE 2005</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/6040070</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : EVHOE 2006</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : EVHOE 2006</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/7040080</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : EVHOE 2007</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : EVHOE 2007</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
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          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/8040120</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : EVHOE 2008</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : EVHOE 2008</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/9040060</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : EVHOE 2009</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : EVHOE 2009</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
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          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/10040080</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : EVHOE 2010</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : EVHOE 2010</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
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          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/8050040</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : LANGOLF 2008</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : LANGOLF 2008</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/9050040</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : LANGOLF 2009</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : LANGOLF 2009</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
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          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/10050030</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : LANGOLF 2010</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : LANGOLF 2010</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/6050240</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : ORHAGO6-2</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : ORHAGO6-2</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
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          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/7050060</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : ORHAGO7-1</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : ORHAGO7-1</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/8050120</gmd:URL>
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              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : ORHAGO 08</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : ORHAGO 08</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
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          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/9050100</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : ORHAGO 09</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Campagne à la mer : ORHAGO 09</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
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          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>http://dx.doi.org/10.17600/10050090</gmd:URL>
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              <gmd:protocol>
                <gco:CharacterString>WWW:LINK</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>Campagne à la mer : ORHAGO 10</gco:CharacterString>
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              <gmd:description>
                <gco:CharacterString>Campagne à la mer : ORHAGO 10</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>https://doi.org/10.12770/676c942a-d28b-4948-9627-4d628138b404</gmd:URL>
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              <gmd:protocol>
                <gco:CharacterString>DOI</gco:CharacterString>
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                <gco:CharacterString>DOI du jeu de données</gco:CharacterString>
              </gmd:name>
              <gmd:description gco:nilReason="missing">
                <gco:CharacterString />
              </gmd:description>
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        <gmd:DQ_Scope>
          <gmd:level>
            <gmd:MD_ScopeCode codeListValue="dataset" codeList="http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#MD_ScopeCode" />
          </gmd:level>
        </gmd:DQ_Scope>
      </gmd:scope>
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        <gmd:DQ_AbsoluteExternalPositionalAccuracy>
          <gmd:evaluationProcedure />
          <gmd:dateTime />
          <gmd:result>
            <gmd:DQ_ConformanceResult>
              <gmd:specification>
                <gmd:CI_Citation>
                  <gmd:title>
                    <gco:CharacterString>Inspire specifications</gco:CharacterString>
                  </gmd:title>
                  <gmd:date>
                    <gmd:CI_Date>
                      <gmd:date>
                        <gco:Date>2012-01-16</gco:Date>
                      </gmd:date>
                      <gmd:dateType>
                        <gmd:CI_DateTypeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_DateTypeCode" codeListValue="creation">creation</gmd:CI_DateTypeCode>
                      </gmd:dateType>
                    </gmd:CI_Date>
                  </gmd:date>
                </gmd:CI_Citation>
              </gmd:specification>
              <gmd:explanation>
                <gco:CharacterString>Non évalué</gco:CharacterString>
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              <gmd:pass>
                <gco:Boolean>false</gco:Boolean>
              </gmd:pass>
            </gmd:DQ_ConformanceResult>
          </gmd:result>
        </gmd:DQ_AbsoluteExternalPositionalAccuracy>
      </gmd:report>
      <gmd:lineage>
        <gmd:LI_Lineage>
          <gmd:statement>
            <gco:CharacterString>Quatre critères, issus des observations des campagnes scientifiques halieutiques, sont établis pour estimer la sensibilité des ressources halieutiques face aux extractions de granulats marins :
    - "Communauté" (campagnes CGFS, EVHOE, LANGOLF, ORHAGO , COPER, COMOR et COSB )
    - "Nourricerie" (campagnes Nurse Vilaine, Nurse Loire Gironde , PECOS, Baie de Seine, Baie de Somme, LANGOLF)
    - "Frayère" (campagnes IBTS et SOLDET)
    - "Diversité" (campagnes Baie de Seine, Baie de Somme, CGFS, EVHOE, LANGOLF, Loire-Gironde, Nurse, ORHAGO, PECOS)
Les individus prélevés lors des campagnes halieutiques sont déterminés (niveau espèce), comptés et mesurés. Un choix a ensuite été fait sur la liste des espèces à considérer pour cette étude.
Pour les critères "Communauté", "Nourricerie" et "Frayère",  les résultats des calculs d'abondances de ces espèces observées sont représentés selon une grille établie pour chaque campagne avec une résolution adaptée.
Pour le critère "Diversité", l'indice de Margalef, qui standardise la richesse spécifique par le nombre d'individus de l’échantillon pour chaque prélèvement, est également représenté selon une grille établie pour chaque campagne avec une résolution adaptée.

Les abondances sont ensuite moyennées par espèce ou groupe d'espèce, toutes campagnes confondues.
Les données de chaque critère sont classées par quartiles afin de les représenter sans masquer la variabilité spatiale. Une donnée de synthèse est générée pour chaque critère, en moyennant les quartiles. Puis une donnée de synthèse des ressources halieutiques est obtenue de la même façon, à partir des synthèses des quatre critères

Ces données, traitées dans l'environnement R, sont ensuite exportées vers ArcGIS pour les mises en forme et pour la gestion de la bancarisation dans Sextant.
Pour plus de détails, consulter les rapports disponibles sur le site https://sextant.ifremer.fr/fr/web/granulats-marins</gco:CharacterString>
          </gmd:statement>
        </gmd:LI_Lineage>
      </gmd:lineage>
    </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
  <gmd:portrayalCatalogueInfo>
    <gmd:MD_PortrayalCatalogueReference>
      <gmd:portrayalCatalogueCitation>
        <gmd:CI_Citation>
          <gmd:title>
            <gco:CharacterString>Observation des ressources halieutiques par les campagnes scientifiques françaises</gco:CharacterString>
          </gmd:title>
          <gmd:date>
            <gmd:CI_Date>
              <gmd:date>
                <gco:Date>2012-01-01</gco:Date>
              </gmd:date>
              <gmd:dateType>
                <gmd:CI_DateTypeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication">publication</gmd:CI_DateTypeCode>
              </gmd:dateType>
            </gmd:CI_Date>
          </gmd:date>
          <gmd:otherCitationDetails>
            <gco:CharacterString>Disponible sur le site Granulats marins https://sextant.ifremer.fr/fr/web/granulats-marins</gco:CharacterString>
          </gmd:otherCitationDetails>
        </gmd:CI_Citation>
      </gmd:portrayalCatalogueCitation>
      <gmd:portrayalCatalogueCitation>
        <gmd:CI_Citation>
          <gmd:title>
            <gco:CharacterString>Espèces les plus vulnérables aux activités d'extraction de granulats marins</gco:CharacterString>
          </gmd:title>
          <gmd:date>
            <gmd:CI_Date>
              <gmd:date>
                <gco:Date>2013-01-01</gco:Date>
              </gmd:date>
              <gmd:dateType>
                <gmd:CI_DateTypeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_DateTypeCode" codeListValue="creation">creation</gmd:CI_DateTypeCode>
              </gmd:dateType>
            </gmd:CI_Date>
          </gmd:date>
          <gmd:otherCitationDetails>
            <gco:CharacterString>Disponible sur le site Granulats marins https://sextant.ifremer.fr/fr/web/granulats-marins</gco:CharacterString>
          </gmd:otherCitationDetails>
        </gmd:CI_Citation>
      </gmd:portrayalCatalogueCitation>
    </gmd:MD_PortrayalCatalogueReference>
  </gmd:portrayalCatalogueInfo>
  <gmd:metadataMaintenance>
    <gmd:MD_MaintenanceInformation>
      <gmd:maintenanceAndUpdateFrequency>
        <gmd:MD_MaintenanceFrequencyCode codeList="http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#MD_MaintenanceFrequencyCode" codeListValue="asNeeded" />
      </gmd:maintenanceAndUpdateFrequency>
    </gmd:MD_MaintenanceInformation>
  </gmd:metadataMaintenance>
</gmd:MD_Metadata>

