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Quantifying the roles of competing static gears: comparative selectivity of longlines and monofilament gill nets in a multi-species fishery of the Algarve (southern Portugal)

2003Journal 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. G.
dc.contributor.authorRibeiro, J.
dc.contributor.authorStergiou, K. I.
dc.date.accessioned2016-12-14T16:22:27Z
dc.date.available2016-12-14T16:22:27Z
dc.date.issued2003
dc.description.abstractFishing trials with monofilament gill nets and longlines using small hooks were carried out in Algarve waters (southern Portugal) over a one-year period. Four hook sizes of "Mustad" brand, round bent, flatted sea hooks (Quality 2316 DT, numbers 15, 13, 12 and 11) and four mesh sizes of 25, 30, 35 and 40 mm (bar length) monofilament gill nets were used. Commercially valuable sea breams dominated the longline catches while small pelagics were relatively more important in the gill nets. Significant differences in the catch size frequency distributions of the two gears were found for all the most important species caught by both gears (Boops boops, Diplodus bellottii, Diplodus vulgaris, Pagellus acarne, Pagellus erythrinus, Spondyiosoma cantharus, Scomber japonicus and Scorpaena notata), with longlines catching larger fish and a wider size range than nets. Whereas longline catch size frequency distributions for most species for the different hook sizes were generally highly overlapped, suggesting little or no differences in size selectivity, gill net catch size frequency distributions clearly showed size selection. A variety of models were fitted to the gill net and hook data using the SELECT method, while the parameters of the logistic model were estimated by maximum likelihood for the longline data. The bi-normal model gave the best fits for most of the species caught with gill nets, while the logistic model adequately described hook selectivity. The results of this study show that the two static gears compete for many of the same species and have different impacts in terms of catch composition and size selectivity. This information will I;e useful for the improved management of these small-scale fisheries in which many different gears compete for scarce resources.
dc.identifier.issn0214-8358
dc.identifier.otherAUT: KER00543; JGO02808;
dc.identifier.urihttp://hdl.handle.net/10400.1/8817
dc.language.isoeng
dc.peerreviewedyes
dc.publisherConsejo Superior de Investigaciones Científicas (CSIC)
dc.relation.isbasedonWOS:000185680400010
dc.titleQuantifying the roles of competing static gears: comparative selectivity of longlines and monofilament gill nets in a multi-species fishery of the Algarve (southern Portugal)
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage352
oaire.citation.issue3
oaire.citation.startPage341
oaire.citation.titleScientia Marina
oaire.citation.volume67
person.familyNameErzini
person.familyNameGonçalves
person.familyNameBentes
person.familyNameLino
person.givenNameKarim
person.givenNameJorge Manuel Santos
person.givenNameLuis
person.givenNamePedro
person.identifier356846
person.identifier849968
person.identifier.ciencia-idD917-7133-341A
person.identifier.ciencia-id1013-ED6A-65EB
person.identifier.ciencia-idC619-63A6-6076
person.identifier.ciencia-id3616-498C-1963
person.identifier.orcid0000-0002-1411-0126
person.identifier.orcid0000-0001-7704-8190
person.identifier.orcid0000-0001-6884-2886
person.identifier.orcid0000-0002-0214-6172
person.identifier.ridM-5216-2013
person.identifier.ridG-5206-2011
person.identifier.ridD-5057-2009
person.identifier.ridB-6065-2008
person.identifier.scopus-author-id7004015948
person.identifier.scopus-author-id7103326116
person.identifier.scopus-author-id6603195176
person.identifier.scopus-author-id6701691255
rcaap.rightsopenAccess
rcaap.typearticle
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