Temporal trends (1989–1999) in populations of Haliotis fulgens and H. corrugata (Gastropoda: Haliotidae) from Cedros Island, Baja California, Mexico

Temporal trends (1989–1999) in populations of Haliotis fulgens and H. corrugata (Gastropoda: Haliotidae) from Cedros Island, Baja California, Mexico

 This work analyzes the temporal trends (1989–1999) of populations of Haliotis fulgens and H. corrugata from Cedros Island, Baja California (Mexico). The mean total density of H. fulgens in the northern (Punta Norte) and southwestern (San Agustín) points of Cedros Island showed a significan...

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Autores principales: Rodríguez-Valencia, JA, Caballero-Alegría, F, Castro-González, J
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2004
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/280
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id oai:cienciasmarinas.com.mx:article-280
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Rodríguez-Valencia, JA
Caballero-Alegría, F
Castro-González, J
spellingShingle Rodríguez-Valencia, JA
Caballero-Alegría, F
Castro-González, J
Temporal trends (1989–1999) in populations of Haliotis fulgens and H. corrugata (Gastropoda: Haliotidae) from Cedros Island, Baja California, Mexico
author_facet Rodríguez-Valencia, JA
Caballero-Alegría, F
Castro-González, J
author_sort Rodríguez-Valencia, JA
title Temporal trends (1989–1999) in populations of Haliotis fulgens and H. corrugata (Gastropoda: Haliotidae) from Cedros Island, Baja California, Mexico
title_short Temporal trends (1989–1999) in populations of Haliotis fulgens and H. corrugata (Gastropoda: Haliotidae) from Cedros Island, Baja California, Mexico
title_full Temporal trends (1989–1999) in populations of Haliotis fulgens and H. corrugata (Gastropoda: Haliotidae) from Cedros Island, Baja California, Mexico
title_fullStr Temporal trends (1989–1999) in populations of Haliotis fulgens and H. corrugata (Gastropoda: Haliotidae) from Cedros Island, Baja California, Mexico
title_full_unstemmed Temporal trends (1989–1999) in populations of Haliotis fulgens and H. corrugata (Gastropoda: Haliotidae) from Cedros Island, Baja California, Mexico
title_sort temporal trends (1989–1999) in populations of haliotis fulgens and h. corrugata (gastropoda: haliotidae) from cedros island, baja california, mexico
description  This work analyzes the temporal trends (1989–1999) of populations of Haliotis fulgens and H. corrugata from Cedros Island, Baja California (Mexico). The mean total density of H. fulgens in the northern (Punta Norte) and southwestern (San Agustín) points of Cedros Island showed a significant decreasing trend, while H. corrugata showed that trend only at San Agustín. Only the mean density of the legal-sized stock of H. fulgens presented a significant decreasing trend at the island. The density extracted due to fishing of H. corrugata at Punta Norte showed a significant increasing trend, but the abundance of its legal-sized stock did not show a significant decreasing trend. Authorized extraction levels for both species at Cedros Island have been lower than the maximum allowed in Mexico (30% of the legal-sized stock of each species for each fishing zone). Recent percentages of recruitment of both species are low and show no significant temporal trends. Apparently, recruitment of both species at Punta Norte decreases when the water temperature increases. A significant negative relationship was found between the physiological condition of both species and increased water temperature at Punta Norte, but such a relationship was absent at San Agustín, suggesting that the effect of warm events may differ among neighboring locations or that the populations differ in physiological tolerance. The magnitude and frequency of fluctuations in the physiological condition of both species should be taken into account when fishing quotas are assigned, since they will surely influence the magnitude and quality of spawning and natural mortality.
publisher Iniversidad Autónoma de Baja California
publishDate 2004
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/280
_version_ 1715723950386839552
spelling oai:cienciasmarinas.com.mx:article-2802019-04-11T21:11:06Z Temporal trends (1989–1999) in populations of Haliotis fulgens and H. corrugata (Gastropoda: Haliotidae) from Cedros Island, Baja California, Mexico Tendencias temporales (1989–1999) en las poblaciones de Haliotis fulgens y H. corrugata (Gastropoda:Haliotidae) de Isla de Cedros, Baja California, México Rodríguez-Valencia, JA Caballero-Alegría, F Castro-González, J abalone temporal dynamics abundance Mexico abulón dinámica temporal abundancia México  This work analyzes the temporal trends (1989–1999) of populations of Haliotis fulgens and H. corrugata from Cedros Island, Baja California (Mexico). The mean total density of H. fulgens in the northern (Punta Norte) and southwestern (San Agustín) points of Cedros Island showed a significant decreasing trend, while H. corrugata showed that trend only at San Agustín. Only the mean density of the legal-sized stock of H. fulgens presented a significant decreasing trend at the island. The density extracted due to fishing of H. corrugata at Punta Norte showed a significant increasing trend, but the abundance of its legal-sized stock did not show a significant decreasing trend. Authorized extraction levels for both species at Cedros Island have been lower than the maximum allowed in Mexico (30% of the legal-sized stock of each species for each fishing zone). Recent percentages of recruitment of both species are low and show no significant temporal trends. Apparently, recruitment of both species at Punta Norte decreases when the water temperature increases. A significant negative relationship was found between the physiological condition of both species and increased water temperature at Punta Norte, but such a relationship was absent at San Agustín, suggesting that the effect of warm events may differ among neighboring locations or that the populations differ in physiological tolerance. The magnitude and frequency of fluctuations in the physiological condition of both species should be taken into account when fishing quotas are assigned, since they will surely influence the magnitude and quality of spawning and natural mortality. Este trabajo, junto con publicaciones recientes sobre la abundancia del abulón en Isla Natividad y el Archipiélago San Benito, forma un cuadro que refleja el estado y la dinámica temporal de este recurso en la costa oeste de Baja California. Se analizaron las tendencias temporales (1989–1999) de las poblaciones de Haliotis fulgens y H. corrugata de Isla de Cedros. La densidad total media de H. fulgens en el extremo norte (Punta Norte) y suroeste (San Agustín) de Isla de Cedros muestra tendencias decrecientes significativas, mientras que H. corrugata muestra esa tendencia sólo en San Agustín. Únicamente la densidad media del stock de talla legal de H. fulgens muestra tendencias significativas al decremento en la isla. La densidad extraída por pesca de H. corrugata en Punta Norte muestra una tendencia significativa al incremento, sin que la abundancia de su stock legal tenga una tendencia decreciente significativa. Los niveles de extracción autorizados para ambas especies en Isla de Cedros han sido menores al máximo permisible en México (30% del stock legal de cada especie en cada zona de captura). Los porcentajes de reclutamiento recientes en ambas especies son bajos y no mostraron tendencias temporales significativas. Aparentemente, el reclutamiento de ambas especies en Punta Norte decrece al incrementarse la temperatura del agua. En Punta Norte se encontró una relación negativa significativa entre la condición fisiológica de ambas especies y el incremento en la temperatura superficial del agua. Sin embargo, dicha relación estuvo ausente en San Agustín, sugiriendo que los efectos de los eventos cálidos pueden diferir entre localidades aledañas, o que sus poblacionales difieren en tolerancia fisiológica. La frecuencia y magnitud de las fluctuaciones en la condición fisiológica de ambas especies deberían ser tomadas en cuenta para la asignación de cuotas de captura, pues estas repercuten seguramente sobre la magnitud y calidad de los desoves y la mortalidad natural. Iniversidad Autónoma de Baja California 2004-03-06 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/280 10.7773/cm.v30i3.280 Ciencias Marinas; Vol. 30 No. 3 (2004); 489-501 Ciencias Marinas; Vol. 30 Núm. 3 (2004); 489-501 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/280/238

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