Spatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs.

The life history characteristics of some elasmobranchs make them particularly vulnerable to fishing mortality; about a third of all species are listed by the IUCN as Threatened or Near Threatened. Marine Protected Areas (MPAs) have been suggested as a tool for conservation of elasmobranchs, but they...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Samuel Shephard, Hans Gerritsen, Michel J Kaiser, David G Reid
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3276233a19944f56a3d9e9af8d77548c
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3276233a19944f56a3d9e9af8d77548c
record_format	dspace
spelling	oai:doaj.org-article:3276233a19944f56a3d9e9af8d77548c2021-11-18T08:08:46ZSpatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs.1932-620310.1371/journal.pone.0049307https://doaj.org/article/3276233a19944f56a3d9e9af8d77548c2012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23166635/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The life history characteristics of some elasmobranchs make them particularly vulnerable to fishing mortality; about a third of all species are listed by the IUCN as Threatened or Near Threatened. Marine Protected Areas (MPAs) have been suggested as a tool for conservation of elasmobranchs, but they are likely to be effective only if such populations respond to fishing impacts at spatial-scales corresponding to MPA size. Using the example of the Celtic Sea, we modelled elasmobranch biomass (kg h(-1)) in fisheries-independent survey hauls as a function of environmental variables and 'local' (within 20 km radius) fishing effort (h y(-1)) recorded from Vessel Monitoring Systems data. Model selection using AIC suggested strongest support for linear mixed effects models in which the variables (i) fishing effort, (ii) geographic location and (iii) demersal fish assemblage had approximately equal importance in explaining elasmobranch biomass. In the eastern Celtic Sea, sampling sites that occurred in the lowest 10% of the observed fishing effort range recorded 10 species of elasmobranch including the critically endangered Dipturus spp. The most intensely fished 10% of sites had only three elasmobranch species, with two IUCN listed as Least Concern. Our results suggest that stable spatial heterogeneity in fishing effort creates de facto refugia for elasmobranchs in the Celtic Sea. However, changes in the present fisheries management regime could impair the refuge effect by changing fisher's behaviour and displacing effort into these areas.Samuel ShephardHans GerritsenMichel J KaiserDavid G ReidPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 11, p e49307 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Samuel Shephard Hans Gerritsen Michel J Kaiser David G Reid Spatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs.
description	The life history characteristics of some elasmobranchs make them particularly vulnerable to fishing mortality; about a third of all species are listed by the IUCN as Threatened or Near Threatened. Marine Protected Areas (MPAs) have been suggested as a tool for conservation of elasmobranchs, but they are likely to be effective only if such populations respond to fishing impacts at spatial-scales corresponding to MPA size. Using the example of the Celtic Sea, we modelled elasmobranch biomass (kg h(-1)) in fisheries-independent survey hauls as a function of environmental variables and 'local' (within 20 km radius) fishing effort (h y(-1)) recorded from Vessel Monitoring Systems data. Model selection using AIC suggested strongest support for linear mixed effects models in which the variables (i) fishing effort, (ii) geographic location and (iii) demersal fish assemblage had approximately equal importance in explaining elasmobranch biomass. In the eastern Celtic Sea, sampling sites that occurred in the lowest 10% of the observed fishing effort range recorded 10 species of elasmobranch including the critically endangered Dipturus spp. The most intensely fished 10% of sites had only three elasmobranch species, with two IUCN listed as Least Concern. Our results suggest that stable spatial heterogeneity in fishing effort creates de facto refugia for elasmobranchs in the Celtic Sea. However, changes in the present fisheries management regime could impair the refuge effect by changing fisher's behaviour and displacing effort into these areas.
format	article
author	Samuel Shephard Hans Gerritsen Michel J Kaiser David G Reid
author_facet	Samuel Shephard Hans Gerritsen Michel J Kaiser David G Reid
author_sort	Samuel Shephard
title	Spatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs.
title_short	Spatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs.
title_full	Spatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs.
title_fullStr	Spatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs.
title_full_unstemmed	Spatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs.
title_sort	spatial heterogeneity in fishing creates de facto refugia for endangered celtic sea elasmobranchs.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/3276233a19944f56a3d9e9af8d77548c
work_keys_str_mv	AT samuelshephard spatialheterogeneityinfishingcreatesdefactorefugiaforendangeredcelticseaelasmobranchs AT hansgerritsen spatialheterogeneityinfishingcreatesdefactorefugiaforendangeredcelticseaelasmobranchs AT micheljkaiser spatialheterogeneityinfishingcreatesdefactorefugiaforendangeredcelticseaelasmobranchs AT davidgreid spatialheterogeneityinfishingcreatesdefactorefugiaforendangeredcelticseaelasmobranchs
_version_	1718422159591735296

Spatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs.

Ejemplares similares