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dc.contributor.authorFernández-Peralta, L. (Lourdes) 
dc.contributor.authorSalmerón, F. (Francisca) 
dc.contributor.authorRamos, A. (Ana)
dc.date.accessioned2012-09-11T10:39:53Z
dc.date.available2012-09-11T10:39:53Z
dc.date.issued2005-03-04
dc.identifier.urihttp://hdl.handle.net/10508/860
dc.description.abstractFrom 1992 to 2001, by-catch that was landed from the Spanish deepwater trawl fishery for black hake off Mauritania was closely monitored. This is a highly specialised fishery, with two species of black hake (Merluccius senegalensis and Merluccius polli) constituting between 77–99% of total landings, which have annually averaged 9 300 tons over the past two decades. Landings of Sparidae were highest among by-catch species of commercial value, with the large-eye dentex, Dentex macrophthalmus being the most important until 1996, after which the family Lophiidae and others predominated. Next were the Elasmobranchii, including large demersal squalids and several species of rays, although their annual landings fell from 182 tons in 1992 to only 4 tons in 1999, rising to 37 tons in 2001. The present paper analyses these changes using by-catches retained in the black hake fishery. We believe that the decline could be due to a set of different factors: a change in depths fished, economic reasons and probable over-exploitation of both targeted species and by-catch. Elasmobranchs constituted only 0.1% of total landings in 1999, compared to 1.9% in 1992, although their contribution to total commercial by-catch was constant. Seasonality was clearly evident, with an absolute and proportional rise in elasmobranch by-catch during warm periods, reaching 75% of by-catch landings in some months, coinciding with a drop in total by-catch. These seasonal variations could be related to the migratory habits of the fishery's target species, black hake.es_ES
dc.language.isoenges_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Españaes_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/es_ES
dc.subjectBlack hakees_ES
dc.subjectBy-catches_ES
dc.subjectElasmobranchses_ES
dc.subjectMauritaniaes_ES
dc.subjectSpanish fisheryes_ES
dc.subjectSparidaees_ES
dc.titleChange in Elasmobranchs and Other Incidental Species in the Spanish Deepwater Black Hake Trawl Fishery off Mauritania (1992–2001)es_ES
dc.typeresearch articlees_ES
dc.identifier.bibliographicCitationJournal of Northwest Atlantic Fishery Science, 35. 2005: 325-331*
dc.relation.publisherversionhttp://journal.nafo.int/dnn/Portals/0/2005/30-fernandez.pdf
dc.publisher.centreCentro Oceanográfico de Vigoes_ES
dc.rights.accessRightsopen accesses_ES
dc.identifier.doi10.2960/J.v35.m534
dc.coverage.spatialStudyAtlantic Oceanen_US
dc.coverage.spatialStudyCentral Atlanticen_US
dc.coverage.spatialStudyEastern Central Atlanticen_US
dc.coverage.spatialStudyMauritanian watersen_US


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