Size structure of a heavily fished benthic/demersal community by shrimp trawling in the Colombian Caribbean Sea

The benthic and demersal communities in the Colombian Caribbean Sea (CCS) are heavily fished by the shrimp trawling fishery, which presents very high discard levels. Here, we conducted an analysis of the size structure of these benthic and demersal communities in the northern and southern zones of t...

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Autores principales:	Gómez-Canchong,Paúl, Quiñones,Renato A, Manjarrés,Luis
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2011
Materias:	fishing effects bycatch ecological indicators size spectra Pareto distribution Caribbean Sea
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000100005
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spelling	oai:scielo:S0718-560X20110001000052011-04-14Size structure of a heavily fished benthic/demersal community by shrimp trawling in the Colombian Caribbean SeaGómez-Canchong,PaúlQuiñones,Renato AManjarrés,Luis fishing effects bycatch ecological indicators size spectra Pareto distribution Caribbean Sea The benthic and demersal communities in the Colombian Caribbean Sea (CCS) are heavily fished by the shrimp trawling fishery, which presents very high discard levels. Here, we conducted an analysis of the size structure of these benthic and demersal communities in the northern and southern zones of the CCS. Sampling was conducted onboard shrimp trawlers throughout an entire year. No significant differences were found in the size distributions of the two zones, among sites within southern ecoregions, or among the analyzed cruises. This homogeneity in size structure is remarkable since the zones analyzed possess very different species compositions and environmental conditions. The observed size structures were adequately described by non-linear distributions rather than the traditionally employed linear normalized biomass size spectra. It is hypothesized that the non-linearity is due to the effect of fishing and particularly, of discarding. This study emphasizes the need for a greater understanding of the impacts that trawl fishing has on community size structure and the applicability of this knowledge towards fishery resource management in ecosystems with high diversity.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.39 n.1 20112011-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000100005en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	fishing effects bycatch ecological indicators size spectra Pareto distribution Caribbean Sea
spellingShingle	fishing effects bycatch ecological indicators size spectra Pareto distribution Caribbean Sea Gómez-Canchong,Paúl Quiñones,Renato A Manjarrés,Luis Size structure of a heavily fished benthic/demersal community by shrimp trawling in the Colombian Caribbean Sea
description	The benthic and demersal communities in the Colombian Caribbean Sea (CCS) are heavily fished by the shrimp trawling fishery, which presents very high discard levels. Here, we conducted an analysis of the size structure of these benthic and demersal communities in the northern and southern zones of the CCS. Sampling was conducted onboard shrimp trawlers throughout an entire year. No significant differences were found in the size distributions of the two zones, among sites within southern ecoregions, or among the analyzed cruises. This homogeneity in size structure is remarkable since the zones analyzed possess very different species compositions and environmental conditions. The observed size structures were adequately described by non-linear distributions rather than the traditionally employed linear normalized biomass size spectra. It is hypothesized that the non-linearity is due to the effect of fishing and particularly, of discarding. This study emphasizes the need for a greater understanding of the impacts that trawl fishing has on community size structure and the applicability of this knowledge towards fishery resource management in ecosystems with high diversity.
author	Gómez-Canchong,Paúl Quiñones,Renato A Manjarrés,Luis
author_facet	Gómez-Canchong,Paúl Quiñones,Renato A Manjarrés,Luis
author_sort	Gómez-Canchong,Paúl
title	Size structure of a heavily fished benthic/demersal community by shrimp trawling in the Colombian Caribbean Sea
title_short	Size structure of a heavily fished benthic/demersal community by shrimp trawling in the Colombian Caribbean Sea
title_full	Size structure of a heavily fished benthic/demersal community by shrimp trawling in the Colombian Caribbean Sea
title_fullStr	Size structure of a heavily fished benthic/demersal community by shrimp trawling in the Colombian Caribbean Sea
title_full_unstemmed	Size structure of a heavily fished benthic/demersal community by shrimp trawling in the Colombian Caribbean Sea
title_sort	size structure of a heavily fished benthic/demersal community by shrimp trawling in the colombian caribbean sea
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000100005
work_keys_str_mv	AT gomezcanchongpaul sizestructureofaheavilyfishedbenthicdemersalcommunitybyshrimptrawlinginthecolombiancaribbeansea AT quinonesrenatoa sizestructureofaheavilyfishedbenthicdemersalcommunitybyshrimptrawlinginthecolombiancaribbeansea AT manjarresluis sizestructureofaheavilyfishedbenthicdemersalcommunitybyshrimptrawlinginthecolombiancaribbeansea
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Size structure of a heavily fished benthic/demersal community by shrimp trawling in the Colombian Caribbean Sea

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