Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)

Detalhes bibliográficos
Autor(a) principal: Erzini, Karim
Data de Publicação: 2010
Outros Autores: Gonçalves, J. M. S., Bentes, L., Lino, P. G., Ribeiro, J., Moutopoulos, D. K., Stergiou, K. I.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/8866
Resumo: Parallel fishing trials with 0.30 mm diameter monofilament gill nets and longlines using small hooks were carried out in the Algarve (southern Portugal) over a one-year period, 1997-1998, with the objective of comparing species composition, catch rates, discards and size ranges. Four hook sizes of MUSTAD brand, round bent, flatted sea hooks (numbers 15, 13, 12 and 11) and four mesh sizes of 50, 60, 70, and 80 (stretched mesh) (nominal bar length) of gill nets were used in the trials. Overall, 84 species were caught, with gill nets taking 71 species and longlines 54 species and with 41 species caught by both gear types. The amount of discarding was higher for gill nets than for longlines. The catch species composition differed between the two gear types, with the commercially valuable sea breams dominating the longline catches whereas small pelagics were relatively more important in the gill nets. Multivariate analysis showed a clear separation between the different sizes of the two gear types both in terms of numbers and weights per species. Algarve gill netters and longliners fish the same species assemblage on the same fishing grounds, but have clearly different impacts in terms of catch species composition, catch rates and sizes. This information will be useful for the improved management of these small-scale, multi-species, multi-gear fisheries, where different gear types compete for scarce resources. In particular this study provides a basis for a more rational allocation of licenses and control of fishing effort.
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spelling Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)Parallel fishing trials with 0.30 mm diameter monofilament gill nets and longlines using small hooks were carried out in the Algarve (southern Portugal) over a one-year period, 1997-1998, with the objective of comparing species composition, catch rates, discards and size ranges. Four hook sizes of MUSTAD brand, round bent, flatted sea hooks (numbers 15, 13, 12 and 11) and four mesh sizes of 50, 60, 70, and 80 (stretched mesh) (nominal bar length) of gill nets were used in the trials. Overall, 84 species were caught, with gill nets taking 71 species and longlines 54 species and with 41 species caught by both gear types. The amount of discarding was higher for gill nets than for longlines. The catch species composition differed between the two gear types, with the commercially valuable sea breams dominating the longline catches whereas small pelagics were relatively more important in the gill nets. Multivariate analysis showed a clear separation between the different sizes of the two gear types both in terms of numbers and weights per species. Algarve gill netters and longliners fish the same species assemblage on the same fishing grounds, but have clearly different impacts in terms of catch species composition, catch rates and sizes. This information will be useful for the improved management of these small-scale, multi-species, multi-gear fisheries, where different gear types compete for scarce resources. In particular this study provides a basis for a more rational allocation of licenses and control of fishing effort.Hellenic Centre for Marine ResearchSapientiaErzini, KarimGonçalves, J. M. S.Bentes, L.Lino, P. G.Ribeiro, J.Moutopoulos, D. K.Stergiou, K. I.2016-12-23T11:18:15Z2010-122010-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/8866eng1108-393XAUT: KER00534; JGO02808;info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:20:13Zoai:sapientia.ualg.pt:10400.1/8866Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:00:56.136590Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)
title Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)
spellingShingle Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)
Erzini, Karim
title_short Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)
title_full Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)
title_fullStr Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)
title_full_unstemmed Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)
title_sort Competition between static gear of the small-scale fisheries in Algarve waters (southern Portugal)
author Erzini, Karim
author_facet Erzini, Karim
Gonçalves, J. M. S.
Bentes, L.
Lino, P. G.
Ribeiro, J.
Moutopoulos, D. K.
Stergiou, K. I.
author_role author
author2 Gonçalves, J. M. S.
Bentes, L.
Lino, P. G.
Ribeiro, J.
Moutopoulos, D. K.
Stergiou, K. I.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Sapientia
dc.contributor.author.fl_str_mv Erzini, Karim
Gonçalves, J. M. S.
Bentes, L.
Lino, P. G.
Ribeiro, J.
Moutopoulos, D. K.
Stergiou, K. I.
description Parallel fishing trials with 0.30 mm diameter monofilament gill nets and longlines using small hooks were carried out in the Algarve (southern Portugal) over a one-year period, 1997-1998, with the objective of comparing species composition, catch rates, discards and size ranges. Four hook sizes of MUSTAD brand, round bent, flatted sea hooks (numbers 15, 13, 12 and 11) and four mesh sizes of 50, 60, 70, and 80 (stretched mesh) (nominal bar length) of gill nets were used in the trials. Overall, 84 species were caught, with gill nets taking 71 species and longlines 54 species and with 41 species caught by both gear types. The amount of discarding was higher for gill nets than for longlines. The catch species composition differed between the two gear types, with the commercially valuable sea breams dominating the longline catches whereas small pelagics were relatively more important in the gill nets. Multivariate analysis showed a clear separation between the different sizes of the two gear types both in terms of numbers and weights per species. Algarve gill netters and longliners fish the same species assemblage on the same fishing grounds, but have clearly different impacts in terms of catch species composition, catch rates and sizes. This information will be useful for the improved management of these small-scale, multi-species, multi-gear fisheries, where different gear types compete for scarce resources. In particular this study provides a basis for a more rational allocation of licenses and control of fishing effort.
publishDate 2010
dc.date.none.fl_str_mv 2010-12
2010-12-01T00:00:00Z
2016-12-23T11:18:15Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.publisher.none.fl_str_mv Hellenic Centre for Marine Research
publisher.none.fl_str_mv Hellenic Centre for Marine Research
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