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Molluscan diversity caught by trawling fisheries: a case study in southern Portugal

2006Journal article Restricted access
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dc.contributor.authorMalaquias, M. A. E.
dc.contributor.authorBentes, L.
dc.contributor.authorErzini, Karim
dc.contributor.authorBorges, T. C.
dc.date.accessioned2016-12-14T16:22:27Z
dc.date.available2016-12-14T16:22:27Z
dc.date.issued2006
dc.description.abstractThe effects of commercial trawling on the malacological communities (except for the Cephalopoda) were examined, based on a study undertaken between 1996 and 2000 on the continental shelf and slope of southern Portugal. More than 50% of species caught by trawling in southern Portugal were discarded, with molluscs representing about 19%. Forty-four species of molluscs (15 bivalves, 28 gastropods and one polyplacophoran) were identified from the discarded specimens. Crustacean trawlers accounted for 34 molluscs species, and fish trawlers for 24. Twenty species were only caught by the crustacean trawl, compared with 10 species by the fish trawl, and 14 species were common to both trawls. The bivalve Venus nux Gmelin was the most numerous species discarded in the fish trawl, accounting for 42.0% of the total number of individuals, followed by the gastropods Ampulla priamus (Meuschen) (7.8%) and Ranella olearium (L.) (7.3%). In the crustacean trawl, the most numerous species discarded were the bivalve Anadara diluvii (Lamarck) (19.4%), the gastropod Calliostoma granulatum (Born) (15.5%), and the bivalve V. nux (15.1%). The third most discarded species from fish trawls in Algarve waters, the gastropod species R. olearium, is a species listed in Annex II of the Bern Convention. The difficulties of managing the real impact of fisheries on the molluscan populations and in defining a conservation strategy are discussed.
dc.identifier.doi10.1111/j.1365-2400.2006.00474.x
dc.identifier.issn0969-997X
dc.identifier.otherAUT: KER00534
dc.identifier.urihttp://hdl.handle.net/10400.1/8810
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley
dc.relation.isbasedonWOS:000234854800005
dc.titleMolluscan diversity caught by trawling fisheries: a case study in southern Portugal
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage45
oaire.citation.issue1
oaire.citation.startPage39
oaire.citation.titleFisheries Management And Ecology
oaire.citation.volume13
person.familyNameBentes
person.familyNameErzini
person.familyNameBorges
person.givenNameLuis
person.givenNameKarim
person.givenNameTeresa Cerveira
person.identifier.ciencia-idC619-63A6-6076
person.identifier.ciencia-idD917-7133-341A
person.identifier.ciencia-id5A1E-E8AD-3E24
person.identifier.orcid0000-0001-6884-2886
person.identifier.orcid0000-0002-1411-0126
person.identifier.orcid0000-0002-6414-0083
person.identifier.ridD-5057-2009
person.identifier.ridM-5216-2013
person.identifier.ridM-3388-2013
person.identifier.scopus-author-id6603195176
person.identifier.scopus-author-id7004015948
person.identifier.scopus-author-id6604001208
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication6569b202-4643-45ec-9861-9fd8d5f09601
relation.isAuthorOfPublicatione20f0e2d-3085-4c37-9e98-260dc9faddea
relation.isAuthorOfPublication7975c9b8-d25a-4bec-91f4-d1193a8e8082
relation.isAuthorOfPublication.latestForDiscovery6569b202-4643-45ec-9861-9fd8d5f09601

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