Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean Sea

Differences in fishery demersal discards in low and high productive marine ecosystems in the North-western Mediterranean were studied. Analyses were carried in three common fishing tactics carried out in different habitats from coastal to slope bottoms. Though clearly out of date (1996-2000 years),...

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Detalles Bibliográficos
Autores: Carbonell, Ana, Mallol, Sandra
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/324072
Acceso en línea:http://hdl.handle.net/10261/324072
Access Level:acceso abierto
Palabra clave:discards
Centro Oceanográfico de Baleares
Pesquerías
trawl fishing impact
Biodiversity
Northwestern Mediterranean Sea
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spelling Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean SeaCarbonell, AnaMallol, SandradiscardsCentro Oceanográfico de BalearesPesqueríastrawl fishing impactBiodiversityNorthwestern Mediterranean SeaDifferences in fishery demersal discards in low and high productive marine ecosystems in the North-western Mediterranean were studied. Analyses were carried in three common fishing tactics carried out in different habitats from coastal to slope bottoms. Though clearly out of date (1996-2000 years), data remain useful when formulating comparisons, and simultaneously establishing a temporal reference values of trawling fishing impact. Results revealed discards were strongly positively correlated with the biomass harvested. In the higher productive zone, in Northern Catalonia, discards varied significantly with the season of the year, whereas in the low productive zone, in the Balearic Islands, discards depend on the characteristics of the biocenosis of the bottom substratum. In the coastal and shelf fisheries, the highest average biomass for retained and discards catches were recorded in spring and summer in Northern Catalonia and autumn and winter in the Balearic Islands. In the slope fishery the maximums were recorded in spring in Northern Catalonia and autumn in the Balearic Islands. By fishing tactic and zone, in the Northern Catalonia discards for coastal and shelf were mainly of fish (44 ± 25 % and 25 ± 12% respectively). This concurs with the fact that in northern Catalonia bigger quantities of pelagic and epi-benthopelagic species with seasonal fluctuations increase in spring and summer. In contrast, in the coastal Balearic fishery discards are more balanced and mainly composed by flora and invertebrate fauna. In the shelf fishery of Balearic Islands, fish represented the higher proportion of discards (49 ± 13%). For slope fishery (28± 17% Balearic Islands and 22± 14% Northern Catalonia) discards were foremost due to species without commercial value and by-catch fish species of small size. Differences between biotic and abiotic factors have demonstrate importance in discards impacts and are key factors to understand how can be reduced discards. By delimiting areas of complex biocenoses structures and fish recruitment zones, as well sensitive seasons in what discards increases, as accuracy as possible, may allow a new management scenario adapted to each zone of reduced discards202320232012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/324072reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Balearesinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3240722026-05-22T06:33:51Z
dc.title.none.fl_str_mv Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean Sea
title Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean Sea
spellingShingle Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean Sea
Carbonell, Ana
discards
Centro Oceanográfico de Baleares
Pesquerías
trawl fishing impact
Biodiversity
Northwestern Mediterranean Sea
title_short Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean Sea
title_full Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean Sea
title_fullStr Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean Sea
title_full_unstemmed Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean Sea
title_sort Differences between demersal fisheries discards: high and low productivity zones of the Northwestern Mediterranean Sea
dc.creator.none.fl_str_mv Carbonell, Ana
Mallol, Sandra
author Carbonell, Ana
author_facet Carbonell, Ana
Mallol, Sandra
author_role author
author2 Mallol, Sandra
author2_role author
dc.subject.none.fl_str_mv discards
Centro Oceanográfico de Baleares
Pesquerías
trawl fishing impact
Biodiversity
Northwestern Mediterranean Sea
topic discards
Centro Oceanográfico de Baleares
Pesquerías
trawl fishing impact
Biodiversity
Northwestern Mediterranean Sea
description Differences in fishery demersal discards in low and high productive marine ecosystems in the North-western Mediterranean were studied. Analyses were carried in three common fishing tactics carried out in different habitats from coastal to slope bottoms. Though clearly out of date (1996-2000 years), data remain useful when formulating comparisons, and simultaneously establishing a temporal reference values of trawling fishing impact. Results revealed discards were strongly positively correlated with the biomass harvested. In the higher productive zone, in Northern Catalonia, discards varied significantly with the season of the year, whereas in the low productive zone, in the Balearic Islands, discards depend on the characteristics of the biocenosis of the bottom substratum. In the coastal and shelf fisheries, the highest average biomass for retained and discards catches were recorded in spring and summer in Northern Catalonia and autumn and winter in the Balearic Islands. In the slope fishery the maximums were recorded in spring in Northern Catalonia and autumn in the Balearic Islands. By fishing tactic and zone, in the Northern Catalonia discards for coastal and shelf were mainly of fish (44 ± 25 % and 25 ± 12% respectively). This concurs with the fact that in northern Catalonia bigger quantities of pelagic and epi-benthopelagic species with seasonal fluctuations increase in spring and summer. In contrast, in the coastal Balearic fishery discards are more balanced and mainly composed by flora and invertebrate fauna. In the shelf fishery of Balearic Islands, fish represented the higher proportion of discards (49 ± 13%). For slope fishery (28± 17% Balearic Islands and 22± 14% Northern Catalonia) discards were foremost due to species without commercial value and by-catch fish species of small size. Differences between biotic and abiotic factors have demonstrate importance in discards impacts and are key factors to understand how can be reduced discards. By delimiting areas of complex biocenoses structures and fish recruitment zones, as well sensitive seasons in what discards increases, as accuracy as possible, may allow a new management scenario adapted to each zone of reduced discards
publishDate 2012
dc.date.none.fl_str_mv 2012
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/324072
url http://hdl.handle.net/10261/324072
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Baleares
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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