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A comparison of direct macrofaunal mortality using three types of clam dredges

dc.contributor.authorGaspar, Miguel
dc.contributor.authorMiguel de Sousa Leitão, Francisco
dc.contributor.authorSantos, M. N.
dc.contributor.authorChícharo, Luís
dc.contributor.authorDias, M. D.
dc.contributor.authorChícharo, Alexandra
dc.contributor.authorMonteiro, C. C.
dc.date.accessioned2013-02-26T15:00:07Z
dc.date.available2013-02-26T15:00:07Z
dc.date.issued2003
dc.date.updated2013-02-19T15:28:48Z
dc.description.abstractThe white clam Spisula solida is harvested along the entire coast of Portugal using mechanical dredges. In this study, the total direct mortality of the macrobenthic community caused by three types of clam dredges (north dredge—ND, traditional dredge—TD, and the metallic grid dredge—GD) used in the S. solida fishery was determined and compared. The relationship between mortality and catching efficiency for each type of dredge was also assessed. Our results showed significant differences for total direct mortality between the ND and both the GD and TD dredges. This difference was largely attributed to the mortality of animals that died in the dredge track as a direct result of the physical damage inflicted by the dredge passing. It was also found that the damage to uncaught individuals is directly related to gear efficiency. The lower catching efficiency of the ND (64%) led to a higher proportion of damaged individuals being left in the dredge path, when compared with the more efficient GD (98%) and TD (90%) dredges. Short and long-term implications of the impact of dredging on the composition of benthic communities are discussed. From fisheries management and ecological points of view, there are obvious advantages to introduce into the bivalve dredge fisheries more efficient and selective dredges in order to reduce the number of damaged individuals and by-catch, and consequently decreasing the impact on the macrobenthic communities.por
dc.identifier.citationGaspar, M. B.; Leitao, F.; Santos, M. N.; Chicharo, L. M. Z.; Dias, M. D.; Chicharo, A.; Monteiro, C. C. A comparison of direct macrofaunal mortality using three types of clam dredges, Ices Journal of Marine Science, 60, 4, 733-742, 2003.por
dc.identifier.issn1054-3139
dc.identifier.otherAUT: MCH00377;
dc.identifier.urihttp://hdl.handle.net/10400.1/2455
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.subjectDirect mortalitypor
dc.subjectDredgepor
dc.subjectFishing impactspor
dc.subjectGear efficiencypor
dc.subjectMacrofaunapor
dc.subjectSpisula solidapor
dc.titleA comparison of direct macrofaunal mortality using three types of clam dredgespor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage742por
oaire.citation.issue4por
oaire.citation.startPage733por
oaire.citation.titleIces Journal of Marine Sciencepor
oaire.citation.volume60por
person.familyNameGaspar
person.familyNameLeitão
person.familyNameChicharo
person.familyNameTeodosio
person.givenNameMiguel
person.givenNameFrancisco
person.givenNameLuis
person.givenNameMaria
person.identifier620214
person.identifier.ciencia-idF719-07AC-E41F
person.identifier.ciencia-id3E1C-DBC2-42D5
person.identifier.ciencia-id6716-EE1C-B995
person.identifier.ciencia-idAF10-647B-65FB
person.identifier.orcid0000-0001-9245-8518
person.identifier.orcid0000-0003-4983-9782
person.identifier.orcid0000-0002-4933-2300
person.identifier.orcid0000-0002-0939-9885
person.identifier.ridF-5398-2011
person.identifier.ridM-3980-2013
person.identifier.ridB-5077-2013
person.identifier.scopus-author-id23501123500
person.identifier.scopus-author-id7003991946
person.identifier.scopus-author-id6602881426
person.identifier.scopus-author-id56196396700
rcaap.rightsopenAccesspor
rcaap.typearticlepor
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relation.isAuthorOfPublication.latestForDiscoveryb138ce56-d033-450e-98a4-2bcb19f4a34e

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