Density-dependent body growth reduces the potential of marine reserves to enhance yields
نویسندگان
چکیده
ANNA GÅRDMARK,* NICLAS JONZÉN*† and MARC MANGEL‡ * Department of Theoretical Ecology, Ecology Building, Lund University, SE-223 62 Lund, Sweden; † Department of Biology and Environmental Sciences, University of Jyväskylä, PO Box 35, FIN-40351, Jyväskylä, Finland; and ‡ Center for Stock Assessment Research and Department of Applied Mathematics and Statistics, Jack Baskin School of Engineering, University of California, Santa Cruz, CA 95064, USA
منابع مشابه
Effects of sex change on the implications of marine reserves for fisheries.
Marine reserves have become widely used in biodiversity conservation and are increasingly proposed as fisheries management tools. Previous modeling studies have found that reserves may increase or decrease yields, depending on local environmental conditions and on the specific life-history traits of the fishery species. Sex-changing (female-to-male) fish are targets of some of the most importan...
متن کاملRapid Effects of Marine Reserves via Larval Dispersal
Marine reserves have been advocated worldwide as conservation and fishery management tools. It is argued that they can protect ecosystems and also benefit fisheries via density-dependent spillover of adults and enhanced larval dispersal into fishing areas. However, while evidence has shown that marine reserves can meet conservation targets, their effects on fisheries are less understood. In par...
متن کاملMarine Reserves Enhance Abundance but Not Competitive Impacts of a Harvested Nonindigenous Species
Marine reserves are being increasingly used to protect exploited marine species. However, blanket protection of species within a reserve may shelter nonindigenous species that are normally affected by harvesting, intensifying their impacts on native species. I studied a system of marine reserves in the San Juan Islands, Washington, USA, to examine the extent to which marine reserves are invaded...
متن کاملEquivalence in yield from marine reserves and traditional fisheries management
Marine reserves have been proposed as a remedy for overfishing and declining marine biodiversity, but concern that reserves would inherently reduce yields has impeded their implementation. It was found that management of fisheries through reserves and management through effort control produce identical yields under a reasonable set of simplifying assumptions corresponding to a broad range of bi...
متن کاملExploitation and recovery of a sea urchin predator has implications for the resilience of southern California kelp forests.
Size-structured predator-prey interactions can be altered by the history of exploitation, if that exploitation is itself size-selective. For example, selective harvesting of larger sized predators can release prey populations in cases where only large individuals are capable of consuming a particular prey species. In this study, we examined how the history of exploitation and recovery (inside m...
متن کامل