期刊
ICES JOURNAL OF MARINE SCIENCE
卷 71, 期 3, 页码 435-449出版社
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fst028
关键词
coral reef fish; fisheries closures; marine conservation; marine protected areas; protogynous hermaphrodites; resource management
资金
- French National Research Agency (ANR) [ANR-08-STRA-03]
- Marine Science for Management (MASMA) programme of the Western Indian Ocean Marine Science Association (WIOMSA)
Many coral reef fish species form predictable, transient spawning aggregations. Many aggregations are overfished, making them a target for spatial management. Here, we develop a per-recruit model to evaluate the performance of no-take marine reserves protecting transient spawning aggregations. The model consists of only 14 demographic and exploitation-related parameters. We applied the model to a protogynous grouper and a gonochoristic rabbitfish from Seychelles and tested six scenarios regarding the extent of protected areas, the level of fish spawning-site fidelity, and fishing effort redistribution post reserve implementation. Spawning aggregation reserves improve spawning-stock biomass-per-recruit and reduce the sex ratio bias in protogynous populations for all scenarios examined. However, these benefits are often small and vary among the different scenarios and as a function of sexual ontogeny. In all scenarios, increases in yield-per-recruit do not occur or are negligible. The long-term yield increases due to spawning aggregation reserves may still occur, but only if spawning-stock biomass recovery results in a recruitment subsidy. Given these limited benefits, the value of no-take reserves must be weighed against those of other management options, such as fishing effort reduction and seasonal fishery closures. The latter is particularly appropriate when spawning and non-spawning areas overlap in space.
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