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Catch composition, catch rates and size selectivity of three long-line methods in the Algarve (southern Portugal)

1999Journal article Open access
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dc.contributor.authorErzini, Karim
dc.contributor.authorGonçalves, J. M. S.
dc.contributor.authorBentes, L.
dc.contributor.authorLino, P. J.
dc.contributor.authorRibeiro, J.
dc.date.accessioned2017-01-19T15:05:22Z
dc.date.available2017-01-19T15:05:22Z
dc.date.issued1999
dc.description.abstractThree long-line methods have been studied in the Algarve: 1) small-hook long-line for inshore (less than 30 m) ‘white’ sea breams (Sparidae); 2) small-hook long-line for deeper water (40-60 m) ‘red’ sea breams; and 3) deep water (500-700 m) semi-pelagic long-line for hake Merluccius merluccius (Linnaeus, 1758). Selectivity studies were carried out with three hook sizes in the first two cases: Mustad round-bent Quality 2369 hooks, numbers 15, 13, and 11, baited with a standardsized razor-shell Ensis siliqua (Linnaeus, 1758). Four hook sizes (numbers 10, 9, 7, and 5) of Stell round-bent, eyed hooks were used in the semi-pelagic long-line selectivity study, baited with a half of a standard-sized sardine. Some factors affecting catch composition and catch rates of the small hook long-lines were also evaluated: bait, gangion length, setting time, fishing ground, and depth. Species diversity was relatively high, with 40, 36 and 27 species, respectively, in the three studies. However, the catches were dominated by a limited number of species. Catch rates (number of fish per 100 hooks) were variable (< 5 %; > 20 %), with a general decrease in catch rate with increasing hook size in all the studies. In general, the catch size distributions for the different hook sizes for each species were highly overlapping, with little or no evidence of differences in size selectivity. Hooks caught a wide size-range for each species, with few or no illegal-sized fish, in most cases. Some implications of these results for the management of multi-species, multi-gear fisheries are discussed.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.issn0074-0195
dc.identifier.otherAUT: KER00534;
dc.identifier.otherAUT: JGO02808;
dc.identifier.urihttp://hdl.handle.net/10400.1/8961
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMinisterio de Agricultura, Pesca y Alimentacionpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectLong-linept_PT
dc.subjectHookspt_PT
dc.subjectMethodspt_PT
dc.subjectArtisanalpt_PT
dc.subjectFisherypt_PT
dc.subjectAlgarvept_PT
dc.subjectPortugalpt_PT
dc.titleCatch composition, catch rates and size selectivity of three long-line methods in the Algarve (southern Portugal)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage323pt_PT
oaire.citation.issue1-4pt_PT
oaire.citation.startPage313pt_PT
oaire.citation.titleBoletín. Instituto Español de Oceanografíapt_PT
oaire.citation.volume15pt_PT
person.familyNameErzini
person.familyNameGonçalves
person.familyNameBentes
person.givenNameKarim
person.givenNameJorge Manuel Santos
person.givenNameLuis
person.identifier356846
person.identifier.ciencia-idD917-7133-341A
person.identifier.ciencia-id1013-ED6A-65EB
person.identifier.ciencia-idC619-63A6-6076
person.identifier.orcid0000-0002-1411-0126
person.identifier.orcid0000-0001-7704-8190
person.identifier.orcid0000-0001-6884-2886
person.identifier.ridM-5216-2013
person.identifier.ridG-5206-2011
person.identifier.ridD-5057-2009
person.identifier.scopus-author-id7004015948
person.identifier.scopus-author-id7103326116
person.identifier.scopus-author-id6603195176
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicatione20f0e2d-3085-4c37-9e98-260dc9faddea
relation.isAuthorOfPublicationdd7829e9-e294-4297-8fb2-adf83c8623cf
relation.isAuthorOfPublication6569b202-4643-45ec-9861-9fd8d5f09601
relation.isAuthorOfPublication.latestForDiscoverydd7829e9-e294-4297-8fb2-adf83c8623cf

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