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Wiley InterScience | ||||||||||||||||||||||||||||||
  Conservation BiologyVolume 21 Issue 2, Pages 447 - 454 Published Online: 26 Feb 2007 ©2010, Society for Conservation Biology Published on behalf of the Society for Conservation Biology
Abstract | References | Full Text: HTML, PDF (Size: 154K) | Related Articles | Citation Tracking  Viability Analysis of Reef Fish Populations Based on Limited Demographic Information Copyright 2007 Society for Conservation Biology KEYWORDS El Niño • environmental variability • Gulf of California • marine protected areas • matrix population models •
Mycteroperca
• population viability analysis • reef fish KEYWORDS análisis de viabilidad poblacional • áreas marinas protegidas • El Niño • Golfo de California • modelos poblacionales matriciales •
Mycteroperca
• peces arrecifales • variabilidad ambiental ABSTRACTAbstract: Marine protected areas (MPAs) that allow some degree of artisanal fishing have been proposed to control the overexploitation of marine resources while allowing extraction by local communities. Nevertheless, the management of MPAs is often impaired by the absence of data on the status of their resources. We devised a method to estimate population growth rates with the type of data that are usually available for reef fishes. We used 7 years of spatially explicit abundance data on the leopard grouper (Mycteroperca rosacea) in an MPA in the Gulf of California, Mexico, to construct a matrix population model that incorporated the effects of El Niño/La Niña Southern Oscillation on population dynamics. An environmental model that estimated different demographic estimates for El Niño and La Niña periods performed better than a single-environment model, and a single-habitat model performed better than a model that considered different depths as different habitats. Our results suggest that the population of the leopard grouper off the main island of the MPA is not viable under present conditions. Although the impact of fishing on leopard grouper populations in the MPA has not yet been established, fishing should be closed as a precautionary measure at this island if a priority of the MPA is to ensure the sustainability of its fish populations. ABSTRACTResumen: Las áreas marinas protegidas (AMP) que permiten cierto grado de pesca artesanal han sido propuestas para controlar la sobreexplotación de recursos marinos mientras permiten la extracción por parte de comunidades locales. Sin embargo, el manejo de AMP a menudo es obstaculizado por la ausencia de datos sobre el estatus de sus recursos. Diseñamos un método para estimar las tasas de crecimiento poblacional con el tipo de datos que generalmente están disponibles para peces arrecifales. Utilizamos datos espacialmente explícitos de la abundancia de Mycteroperca rosacea durante 7 años en un AMP en el Golfo de California, México, para construir un modelo poblacional matricial que incorporó los efectos de la Oscilación Sureña de El Niño/La Niña sobre la dinámica poblacional. Un modelo ambiental que evaluó diferentes estimaciones demográficas para períodos de El Niño y La Niña funcionó mejor que un modelo para un solo ambiente, y un modelo para un solo hábitat funcionó mejor que uno que consideró diferentes profundidades como hábitats diferentes. Nuestros resultados sugieren que la población de M. rosacea cercana a la isla principal del AMP no es viable bajo las condiciones actuales. Aunque no se ha establecido el impacto de la pesca sobre las poblaciones de M. rosacea en el AMP, se debe vedar la pesca en esta isla como una medida precautoria si una prioridad del AMP es asegurar la sustentabilidad de sus poblaciones de peces. Paper submitted November 30, 2005; revised manuscript accepted October 26, 2006. | 
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Free Article from Conservation Biology |  |
The article One Hundred Questions of Importance to the Conservation of Global Biological Diversity is now available FREE online. | |
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Conservation Letters |
Conservation Letters is a new, online-only scientific journal publishing empirical and theoretical research with significant implications for the conservation of biological diversity. |
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Conservation |
Conservation is a sophisticated, readable, and utterly practical magazine for people who are serious about conservation. |
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 | New Perspectives on Psychology and Human–Animal Interactions |
This issue of Journal of Social Issues focuses on human attitudes toward the use of other species, the effects of relationships with companion animals on human health and well-being, and the ethical and policy implications of our interactions with other species. | |
