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Effects of leader material on catches of shallow pelagic longline fisheries in the southwest Indian Ocean

2017-03-10Journal article Open access
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dc.contributor.authorSantos, Miguel
dc.contributor.authorLino, Pedro
dc.contributor.authorCoelho, Rui
dc.date.accessioned2020-12-03T10:02:59Z
dc.date.available2020-12-03T10:02:59Z
dc.date.issued2017-03-10
dc.description.abstractCatches from a commercial longline fishery targeting swordfish (Xiphias gladius) on monofilament nylon leaders were compared with catches on wire leaders in the Indian Ocean. More taxa were caught on wire leaders, which also showed higher catch rates (13% and 56%, in number and weight, respectively) of blue shark (Prionace glauca). In contrast, catch rates of swordfish were not significantly affected by leader material. Nylon leaders showed lower at-haulback mortality for most bony fishes, except swordfish. Higher bite-off rates were observed on nylon monofilament, likely owing to the escape of species with sharp teeth, such as sharks. Both leader types caught most species within similar size ranges, but larger mean sizes of blue shark were recorded on wire leaders. The value per unit of effort (VPUE) of the retained catch did not differ between leader materials; however, VPUEs are highly dependent on market fluctuations. Banning wire leaders could be an effective way of reducing shark catches, particularly blue shark catches, in the southwest Indian Ocean.pt_PT
dc.description.sponsorshipPrograma Operacional das Pescas: LL-SHARKs - Ref 31- 03-05-FEP-44, FCT IF/00253/2014pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.7755/FB115.2.9pt_PT
dc.identifier.issn0090-0656
dc.identifier.urihttp://hdl.handle.net/10400.1/14863
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherNational Marine Fisheries Servicept_PT
dc.relation.publisherversionhttps://spo.nmfs.noaa.gov/sites/default/files/pdf-content/fish-bull/santos.pdfpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt_PT
dc.subjectHook performancept_PT
dc.subjectShark bycatchpt_PT
dc.subjectCircle hookspt_PT
dc.subjectMortalitypt_PT
dc.subjectSwordfishpt_PT
dc.titleEffects of leader material on catches of shallow pelagic longline fisheries in the southwest Indian Oceanpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage232pt_PT
oaire.citation.startPage219pt_PT
oaire.citation.titleFishery Bulletinpt_PT
oaire.citation.volume115(2)pt_PT
person.familyNameCoelho
person.givenNameRui
person.identifier134638
person.identifier.ciencia-idDC1A-20B7-EAC0
person.identifier.orcid0000-0003-3813-5157
person.identifier.ridC-1163-2008
person.identifier.scopus-author-id56257111100
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication6366aa1b-1301-43a3-b2b0-1280311ac95f
relation.isAuthorOfPublication.latestForDiscovery6366aa1b-1301-43a3-b2b0-1280311ac95f

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