Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.1/2392 |
Resumo: | Macro and meiobenthic communities of two fishing areas (Vilamoura and Lagos) in the western part of south Portugal (Algarve coast) were analysed. Both locations had been under severe dredge-fishing impact until four years previously. Vilamoura has since continued to be dredged, while fishing activity in Lagos was stopped in 1995 as a response to overfishing. For each location, three replicate areas were analysed at depths of 7–9 m. In each of these areas, 18 quadrats for macrofauna and 12 cores for meiofauna were randomly sampled by SCUBA divers during September 1999. The Shannon–Weiner diversity index was higher for meiofauna in the fished area, whereas macrofauna diversity was higher in the recently non-fished area. Bray–Curtis dissimilarity between the two areas was 87·82%. Major differences were found between Ampeliscidea, Amphiura mediterranea, Spisula solida, Haustoriidae, Nemertinea and Diogenes pugilator populations at the two sites. There was higher abundance but lower biomass of potential macrofaunal scavengers in the fished area, and carnivore biomass was also higher in this area. Deposit-feeders dominated meiofauna abundance in both study areas. The community structure of the continuously fished area was dominated by small, opportunistic, short-lived species while the community structure of the recently non-fished area was dominated by more fragile and long-living sessile organisms. |
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Ecological characterization of dredged and non-dredged bivalve fishing areas off south PortugalMacrobenthic secondary productionDifferent habitatsIntertidal zoneRia-FormosaNorth-SeaCommunityMacro and meiobenthic communities of two fishing areas (Vilamoura and Lagos) in the western part of south Portugal (Algarve coast) were analysed. Both locations had been under severe dredge-fishing impact until four years previously. Vilamoura has since continued to be dredged, while fishing activity in Lagos was stopped in 1995 as a response to overfishing. For each location, three replicate areas were analysed at depths of 7–9 m. In each of these areas, 18 quadrats for macrofauna and 12 cores for meiofauna were randomly sampled by SCUBA divers during September 1999. The Shannon–Weiner diversity index was higher for meiofauna in the fished area, whereas macrofauna diversity was higher in the recently non-fished area. Bray–Curtis dissimilarity between the two areas was 87·82%. Major differences were found between Ampeliscidea, Amphiura mediterranea, Spisula solida, Haustoriidae, Nemertinea and Diogenes pugilator populations at the two sites. There was higher abundance but lower biomass of potential macrofaunal scavengers in the fished area, and carnivore biomass was also higher in this area. Deposit-feeders dominated meiofauna abundance in both study areas. The community structure of the continuously fished area was dominated by small, opportunistic, short-lived species while the community structure of the recently non-fished area was dominated by more fragile and long-living sessile organisms.SapientiaChícharo, LuísChicharo, Maria AlexandraGaspar, M.Alves, FilipeRegala, J.2013-02-21T15:19:24Z20022013-02-19T15:45:12Z2002-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/2392engChicharo, L. M. Z.; Chicharo, A.; Gaspar, M.; Alves, F.; Regala, J. Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal, Journal of the Marine Biological Association of the United Kingdom, 82, 1, 41-50, 2002.0025-3154AUT: MCH00377;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:RCAAP2023-07-24T10:13:34Zoai:sapientia.ualg.pt:10400.1/2392Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:56:19.997378Repositório 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 |
Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal |
title |
Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal |
spellingShingle |
Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal Chícharo, Luís Macrobenthic secondary production Different habitats Intertidal zone Ria-Formosa North-Sea Community |
title_short |
Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal |
title_full |
Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal |
title_fullStr |
Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal |
title_full_unstemmed |
Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal |
title_sort |
Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal |
author |
Chícharo, Luís |
author_facet |
Chícharo, Luís Chicharo, Maria Alexandra Gaspar, M. Alves, Filipe Regala, J. |
author_role |
author |
author2 |
Chicharo, Maria Alexandra Gaspar, M. Alves, Filipe Regala, J. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Chícharo, Luís Chicharo, Maria Alexandra Gaspar, M. Alves, Filipe Regala, J. |
dc.subject.por.fl_str_mv |
Macrobenthic secondary production Different habitats Intertidal zone Ria-Formosa North-Sea Community |
topic |
Macrobenthic secondary production Different habitats Intertidal zone Ria-Formosa North-Sea Community |
description |
Macro and meiobenthic communities of two fishing areas (Vilamoura and Lagos) in the western part of south Portugal (Algarve coast) were analysed. Both locations had been under severe dredge-fishing impact until four years previously. Vilamoura has since continued to be dredged, while fishing activity in Lagos was stopped in 1995 as a response to overfishing. For each location, three replicate areas were analysed at depths of 7–9 m. In each of these areas, 18 quadrats for macrofauna and 12 cores for meiofauna were randomly sampled by SCUBA divers during September 1999. The Shannon–Weiner diversity index was higher for meiofauna in the fished area, whereas macrofauna diversity was higher in the recently non-fished area. Bray–Curtis dissimilarity between the two areas was 87·82%. Major differences were found between Ampeliscidea, Amphiura mediterranea, Spisula solida, Haustoriidae, Nemertinea and Diogenes pugilator populations at the two sites. There was higher abundance but lower biomass of potential macrofaunal scavengers in the fished area, and carnivore biomass was also higher in this area. Deposit-feeders dominated meiofauna abundance in both study areas. The community structure of the continuously fished area was dominated by small, opportunistic, short-lived species while the community structure of the recently non-fished area was dominated by more fragile and long-living sessile organisms. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002 2002-01-01T00:00:00Z 2013-02-21T15:19:24Z 2013-02-19T15:45:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.1/2392 |
url |
http://hdl.handle.net/10400.1/2392 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Chicharo, L. M. Z.; Chicharo, A.; Gaspar, M.; Alves, F.; Regala, J. Ecological characterization of dredged and non-dredged bivalve fishing areas off south Portugal, Journal of the Marine Biological Association of the United Kingdom, 82, 1, 41-50, 2002. 0025-3154 AUT: MCH00377; |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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