Abundance and associations of two commercially important gastropods (Astraea and Haliotis) in Isla San Jeronimo, Baja California, Mexico

Abundance and associations of two commercially important gastropods (Astraea and Haliotis) in Isla San Jeronimo, Baja California, Mexico

We present the status of Astraea (Lithopoma) undosa, A. (L.) turbanica, and Haliotis spp. in Isla San Jerónimo, Baja California, Mexico and describe the associations between the dominant flora and fauna in their habitat. Forty years ago this area was one of the main fishing areas for Astraea and Hal...

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Autores principales: Rodríguez-Valencia, JA, Caballero-Alegría, F, Uribe-Osorio, F, Arano-Castañon, A
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2002
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/206
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spelling oai:cienciasmarinas.com.mx:article-2062019-05-02T20:35:30Z Abundance and associations of two commercially important gastropods (Astraea and Haliotis) in Isla San Jeronimo, Baja California, Mexico Abundancia y asociaciones de dos gasterópodos (Astraea y Haliotis) comercialmente importantes en Isla San Jerónimo, Baja California, México Rodríguez-Valencia, JA Caballero-Alegría, F Uribe-Osorio, F Arano-Castañon, A Astraea Haliotis Bahía del Rosario Isla San Jerónimo Mexico Astraea Haliotis Bahía del Rosario Isla San Jerónimo México We present the status of Astraea (Lithopoma) undosa, A. (L.) turbanica, and Haliotis spp. in Isla San Jerónimo, Baja California, Mexico and describe the associations between the dominant flora and fauna in their habitat. Forty years ago this area was one of the main fishing areas for Astraea and Haliotis along the peninsula, but now it is overexploited. The mean density of A. undosa was 0.1 m–2 and that of A. turbanica was 0.006 m–2. Both species have a low proportion of organisms with the minimum legal size of capture. No abalones were found around the island, but few were found in the intertidal. There is a good proportion of suitable rocky habitat and food for Astraea and Haliotis. Positive associations between dominant macroinvertebrates and flora were detected. Rocky areas with vegetation are the common habitat of Kelletia sp. and Pisaster sp. (predators); and of Strongylocentrotus franciscanus, Tegula spp., and Megathura crenulata (prey); and they were positively associated. Our results suggest a negative covariation and spatial segregation between A. undosa and A. turbanica. Se presenta el estado de Astraea (Lithopoma) undosa, A. (L.) turbanica, y Haliotis spp. en Isla San Jerónimo, Baja California, México, y se describen las asociaciones entre la flora y fauna dominantes en sus hábitats. Hace cuarenta años ésta era una de las principales zonas de captura de Astraea y Haliotis en la península, pero ahora se encuentra sobre-explotada. La densidad media de A. undosa fue de 0.1 m–2 y la de A. turbanica fue de 0.006 m–2. Ambas especies presentan una baja proporción de organismos con tallas superiores a las legales de captura. No se encontraron abulones alrededor de la isla, pero se encontraron unos cuantos en la zona intermareal. La isla tiene una gran proporción de substrato rocoso y alimento para Astraea y Haliotis. Se detectaron asociaciones positivas significativas entre los macroinvertebrados y la flora dominantes. Las zonas rocosas con vegetación constituyen el hábitat común de Kelletia sp. y Pisaster sp. (depredadores); y de Strongylocentrotus franciscanus, Tegula spp. y Megathura crenulata (presas); los cuales están asociados positivamente. Los resultados sugieren una covariación negativa y segregación espacial entre A. undosa y A. turbanica. Iniversidad Autónoma de Baja California 2002-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/206 10.7773/cm.v28i1.206 Ciencias Marinas; Vol. 28 No. 1 (2002); 49-66 Ciencias Marinas; Vol. 28 Núm. 1 (2002); 49-66 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/206/173
institution Ciencias Marinas
collection OJS
language eng
format Online
author Rodríguez-Valencia, JA
Caballero-Alegría, F
Uribe-Osorio, F
Arano-Castañon, A
spellingShingle Rodríguez-Valencia, JA
Caballero-Alegría, F
Uribe-Osorio, F
Arano-Castañon, A
Abundance and associations of two commercially important gastropods (Astraea and Haliotis) in Isla San Jeronimo, Baja California, Mexico
author_facet Rodríguez-Valencia, JA
Caballero-Alegría, F
Uribe-Osorio, F
Arano-Castañon, A
author_sort Rodríguez-Valencia, JA
title Abundance and associations of two commercially important gastropods (Astraea and Haliotis) in Isla San Jeronimo, Baja California, Mexico
title_short Abundance and associations of two commercially important gastropods (Astraea and Haliotis) in Isla San Jeronimo, Baja California, Mexico
title_full Abundance and associations of two commercially important gastropods (Astraea and Haliotis) in Isla San Jeronimo, Baja California, Mexico
title_fullStr Abundance and associations of two commercially important gastropods (Astraea and Haliotis) in Isla San Jeronimo, Baja California, Mexico
title_full_unstemmed Abundance and associations of two commercially important gastropods (Astraea and Haliotis) in Isla San Jeronimo, Baja California, Mexico
title_sort abundance and associations of two commercially important gastropods (astraea and haliotis) in isla san jeronimo, baja california, mexico
description We present the status of Astraea (Lithopoma) undosa, A. (L.) turbanica, and Haliotis spp. in Isla San Jerónimo, Baja California, Mexico and describe the associations between the dominant flora and fauna in their habitat. Forty years ago this area was one of the main fishing areas for Astraea and Haliotis along the peninsula, but now it is overexploited. The mean density of A. undosa was 0.1 m–2 and that of A. turbanica was 0.006 m–2. Both species have a low proportion of organisms with the minimum legal size of capture. No abalones were found around the island, but few were found in the intertidal. There is a good proportion of suitable rocky habitat and food for Astraea and Haliotis. Positive associations between dominant macroinvertebrates and flora were detected. Rocky areas with vegetation are the common habitat of Kelletia sp. and Pisaster sp. (predators); and of Strongylocentrotus franciscanus, Tegula spp., and Megathura crenulata (prey); and they were positively associated. Our results suggest a negative covariation and spatial segregation between A. undosa and A. turbanica.
publisher Iniversidad Autónoma de Baja California
publishDate 2002
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/206
_version_ 1715723942103089152

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