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Trammel net catch species composition, catch rates and metiers in southern European waters: A multivariate approach

2006Journal article Restricted access
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dc.contributor.authorStergiou, Konstantinos
dc.contributor.authorMoutopoulos, D. K.
dc.contributor.authorSoriguer, M. C.
dc.contributor.authorPuente, E.
dc.contributor.authorLino, P. G.
dc.contributor.authorZabala, C.
dc.contributor.authorMonteiro, Pedro
dc.contributor.authorErrazkin, L. A.
dc.contributor.authorErzini, Karim
dc.date.accessioned2016-12-14T16:22:31Z
dc.date.available2016-12-14T16:22:31Z
dc.date.issued2006
dc.description.abstractWe identified and quantified the effect of season, depth, and inner and outer panel mesh size on the trammel net catch species composition and catch rates in four southern European areas (Northeast Atlantic: Basque Country, Spain; Algarve, Portugal; Gulf of Cadiz, Spain; Mediterranean: Cyclades, Greece), all of which are characterised by important trammel net fisheries. In each area, we conducted, in 1999-2000, seasonal, experimental fishing trials at various depths with trammel nets of six different inner/outer panel mesh combinations (i.e., two large outer panel meshes and three small inner panel meshes). Overall, our study covered some of the most commonly used inner panel mesh sizes, ranging from 40 to 140 mm (stretched). We analysed the species composition and catch rates of the different inner/outer panel combinations with regression, multivariate analysis (cluster analysis and multidimensional scaling) and other 'community' techniques (number of species, dominance curves). All our analyses indicated that the outer panel mesh sizes used in the present study did not significantly affect the catch characteristics in terms of number of species, catch rates and species composition. Multivariate analyses and seasonal dominance plots indicated that in Basque, Algarve and Cyclades waters, where sampling covered wide depth ranges, both season and depth strongly affected catch species compositions. For the Gulf of Cadiz, where sampling was restricted to depths 10-30 m, season was the only factor affecting catch species composition and thus group formation. In contrast, the inner panel mesh size did not generally affect multidimensional group formation in all areas but affected the dominance of the species caught in the Algarve and the Gulf of Cadiz. Multivariate analyses also revealed 11 different metiers (i.e., season-depth-species-inner panel mesh size combinations) in the four areas. This clearly indicated the existence of trammel net 'hot spots', which represent essential habitats (e.g., spawning, nursery or wintering grounds) of the life history of the targeted and associated species. The number of specimens caught declined significantly with inner panel mesh size in all areas. We attributed this to the exponential decline in abundance with size, both within- and between-species. In contrast, the number of species caught in each area was not related to the inner mesh size. This was unexpected and might be a consequence of the wide size-selective range of trammel nets. (c) 2006 Elsevier B.V All rights reserved.
dc.identifier.doi10.1016/j.fishres.2006.03.003
dc.identifier.issn0165-7836
dc.identifier.urihttp://hdl.handle.net/10400.1/8841
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relation.isbasedonWOS:000238401700021
dc.titleTrammel net catch species composition, catch rates and metiers in southern European waters: A multivariate approach
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceLa Paz, MEXICO
oaire.citation.endPage182
oaire.citation.issue01-fev
oaire.citation.startPage170
oaire.citation.titleFisheries Research
oaire.citation.volume79
person.familyNameStergiou
person.familyNameLino
person.familyNameMonteiro
person.familyNameErzini
person.givenNameKonstantinos
person.givenNamePedro
person.givenNamePedro
person.givenNameKarim
person.identifier849968
person.identifier.ciencia-id3616-498C-1963
person.identifier.ciencia-idD917-7133-341A
person.identifier.orcid0000-0002-6039-3585
person.identifier.orcid0000-0002-0214-6172
person.identifier.orcid0000-0003-1446-8256
person.identifier.orcid0000-0002-1411-0126
person.identifier.ridB-6065-2008
person.identifier.ridD-4995-2009
person.identifier.ridM-5216-2013
person.identifier.scopus-author-id6701691255
person.identifier.scopus-author-id7004015948
rcaap.rightsrestrictedAccess
rcaap.typearticle
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