Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela

Holothurian populations in the Caribbean have been significantly depleted in some areas, and others are still in danger to satisfy international markets. In Venezuela, this marine resource has been illegally exploited since the early 1990s. To contribute with their management and protection, this wo...

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Autores principales:	Tagliafico, Alejandro, Salomé Rangel, María, Rago, Néstor
Formato:	Online
Idioma:	spa
Publicado:	Universidad de Costa Rica 2011
Acceso en línea:	https://revistas.ucr.ac.cr/index.php/rbt/article/view/3144

id	RBT3144
record_format	ojs
spelling	RBT31442022-06-06T18:56:43Z Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela Tagliafico, Alejandro Salomé Rangel, María Rago, Néstor Isostichopus badionotus Holoturia mexicana sea cucumber beche-de-mer pepino de mar Holothurian populations in the Caribbean have been significantly depleted in some areas, and others are still in danger to sat-isfy international markets. In Venezuela, this marine resource has been illegally exploited since the early 1990s. To contribute with their management and protection, this work analyzed the distribution, abundance and popula-tion structure of two commercial holothurians Isostichopus badionotus andHolothuria mexicanain Cubagua Island shores. A total of 52 stations were studied around the island during the year 2008. Surveys included visits to each station, for which a band transect of 50m2 with four replicates were carried out. The results show that I. badionotus has a higher distribution on the East coast of the island, and is found over Thalassia testudinum beds or bivalve molluscs aggregations, with an average density of 0.011ind/m2, C.I. 95%=0.005-0.017, n=122, and a general abundance estimated in 117ind/ha. H. mexicana has been practically depleted (0.001 ind/m2 C.I. 95%=0.0002-0.0013, 7.7 ind/ha, n=8). We recommend the maintenance of the total ban adopted in 1997 to assure the protection of these species, mainly because no previous data supported the start of the fishery, and also, because the current densities are still very low when compared to other areas in Venezuela and the Caribbean. These are animals easy to catch, susceptible to overfishing, and with a very low recovery rate; thus, more control is required from the local authorities. Holothurian populations in the Caribbean have been significantly depleted in some areas, and others are still in danger to satisfy international markets. In Venezuela, this marine resource has been illegally exploited since the early 1990s. To contribute with their management and protection, this work analyzed the distribution, abundance and population structure of two commercial holothurians Isostichopus badionotus and Holothuria mexicana in Cubagua Island shores. A total of 52 stations were studied around the island during the year 2008. Surveys included visits to each station, for which a band transect of 50m2 with four replicates were carried out. The results show that I. badionotus has a higher distribution on the East coast of the island, and is found over Thalassia testudinum beds or bivalve molluscs aggregations, with an average density of 0.011ind/m2, C.I. 95%=0.005-0.017, n=122, and a general abundance estimated in 117ind/ha. H. mexicana has been practically depleted (0.001 ind/m2 C.I. 95%=0.0002-0.0013, 7.7 ind/ha, n=8). We recommend the maintenance of the total ban adopted in 1997 to assure the protection of these species, mainly because no previous data supported the start of the fishery, and also, because the current densities are still very low when compared to other areas in Venezuela and the Caribbean. These are animals easy to catch, susceptible to overfishing, and with a very low recovery rate; thus, more control is required from the local authorities. Universidad de Costa Rica 2011-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/3144 10.15517/rbt.v0i0.3144 Revista de Biología Tropical; Vol. 59 No. 2 (2011): Volume 59 – Regular number 2 – June 2011; 843–852 Revista de Biología Tropical; Vol. 59 Núm. 2 (2011): Volumen 59 – Número regular 2 – Junio 2011; 843–852 Revista Biología Tropical; Vol. 59 N.º 2 (2011): Volume 59 – Regular number 2 – June 2011; 843–852 2215-2075 0034-7744 10.15517/rbt.v0i0 spa https://revistas.ucr.ac.cr/index.php/rbt/article/view/3144/3051 Copyright (c) 2011 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0
institution	Universidad de Costa Rica
collection	Revista de Biología Tropical
language	spa
format	Online
author	Tagliafico, Alejandro Salomé Rangel, María Rago, Néstor
spellingShingle	Tagliafico, Alejandro Salomé Rangel, María Rago, Néstor Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela
author_facet	Tagliafico, Alejandro Salomé Rangel, María Rago, Néstor
author_sort	Tagliafico, Alejandro
description	Holothurian populations in the Caribbean have been significantly depleted in some areas, and others are still in danger to satisfy international markets. In Venezuela, this marine resource has been illegally exploited since the early 1990s. To contribute with their management and protection, this work analyzed the distribution, abundance and population structure of two commercial holothurians Isostichopus badionotus and Holothuria mexicana in Cubagua Island shores. A total of 52 stations were studied around the island during the year 2008. Surveys included visits to each station, for which a band transect of 50m2 with four replicates were carried out. The results show that I. badionotus has a higher distribution on the East coast of the island, and is found over Thalassia testudinum beds or bivalve molluscs aggregations, with an average density of 0.011ind/m2, C.I. 95%=0.005-0.017, n=122, and a general abundance estimated in 117ind/ha. H. mexicana has been practically depleted (0.001 ind/m2 C.I. 95%=0.0002-0.0013, 7.7 ind/ha, n=8). We recommend the maintenance of the total ban adopted in 1997 to assure the protection of these species, mainly because no previous data supported the start of the fishery, and also, because the current densities are still very low when compared to other areas in Venezuela and the Caribbean. These are animals easy to catch, susceptible to overfishing, and with a very low recovery rate; thus, more control is required from the local authorities.
title	Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela
title_short	Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela
title_full	Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela
title_fullStr	Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela
title_full_unstemmed	Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela
title_sort	distribución y densidad de dos especies de holoturoideos en la isla de cubagua, venezuela
title_alt	Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela
publisher	Universidad de Costa Rica
publishDate	2011
url	https://revistas.ucr.ac.cr/index.php/rbt/article/view/3144
work_keys_str_mv	AT tagliaficoalejandro distribucionydensidaddedosespeciesdeholoturoideosenlaisladecubaguavenezuela AT salomerangelmaria distribucionydensidaddedosespeciesdeholoturoideosenlaisladecubaguavenezuela AT ragonestor distribucionydensidaddedosespeciesdeholoturoideosenlaisladecubaguavenezuela
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Distribución y densidad de dos especies de holoturoideos en la isla de Cubagua, Venezuela

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