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• W2159972450 abstract "Abstract: Marine reserves have been suggested as tools for assisting the management of fisheries by protecting vulnerable marine species from overexploitation. Although there is a theoretical basis for believing that marine reserves may serve as management tools, there are few marine reserves in the world in which to test their effectiveness. My research evaluated three forms of marine reserve on the south coast of Vancouver Island, British Columbia, Canada. I used northern abalone (Haliotis kamtschatkana), a severely depleted shellfish in this region, as an indicator of the effectiveness of the reserves. Abalone populations in eight sites receiving different degrees of spatial protection were counted and measured in situ during the spring of 1996 and 1997. In all sites with enforced harvest closures, populations of abalone were greater, and one site with nearly 40 years of protection had on average much larger (older) abalone. Reproductive output, as a function of abundance and size, was also greater in the enforced reserve areas. Larval dispersal from reserves, and hence the benefit to exploited areas, was not formally surveyed. Nevertheless, the results of my study, combined with knowledge of present abalone populations, life history, and regional hydrodynamics, suggest that establishment of reserves is justified in the absence of perfect knowledge of larval dispersal. Resumen: Se ha sugerido que la reservas marinas son un instrumento para el manejo de pesquerías al proteger de la sobrexplotación a especies marinas vulnerables. Aunque existen bases teóricas para aceptar que las reservas marinas tiene futuro como instrumentos de manejo, existen pocas reservas marinas en el mundo para probar su efectividad. Mi investigación evaluó tres tipos de reserva marina en la costa sur de la Isla Vancouver, Columbia Británica, Canadá. Utilicé el Abulón del Norte (Haliotis kamtschatkana), un molusco severamente disminuido, como indicador de la efectividad de las rservas. Las poblaciones de abulón en ocho sitios con diferentes niveles de protección espacial fueron cuantificadas y medidas in situ durante las primaveras de 1996 y 1997. Las poblaciones de abulón fueron mayores en todos los sitios con capturas controladas; un sitio protegido por casi 40 años, en promedio tuvo abulones más grandes (viejos). La reproducción, como una función de la abundancia y la talla, también fue mayor en las áreas protegidas con vigilancia. La dispersión de larvas de las reservas, y por tanto su beneficio para las áreas de explotación, no fue explorada formalmente. Sin embargo, los resultados de este estudio combinados con el conocimiento de las poblaciones actuales de abulón, de sus tablas de vida y de la hidrodinámica regional sugieren que el establecimiento de reservas es justificado ante el desconocimiento de la dispersión de larvas." @default.
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• W2159972450 date "1999-08-01" @default.
• W2159972450 modified "2023-09-30" @default.
• W2159972450 title "Evaluating the Effects of Three Forms of Marine Reserve on Northern Abalone Populations in British Columbia, Canada" @default.
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• W2159972450 doi "https://doi.org/10.1046/j.1523-1739.1999.98117.x" @default.
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