Evaluating marine spatial closures with conflicting fisheries and conservation objectives

• Published in: The Journal of applied ecology Vol. 50; no. 4; pp. 1060 - 1070
• Main Authors: Dichmont, Catherine M., Ellis, Nick, Bustamante, Rodrigo H., Deng, Roy, Tickell, Sharon, Pascual, Ricardo, Lozano-Montes, Hector, Griffiths, Shane
• Format: Journal Article
• Language: English
• Published: Oxford John Wiley & Sons Ltd 01-08-2013; Blackwell
• Subjects: Animal and plant ecology; Animal, plant and microbial ecology; Applied ecology; Biological and medical sciences; Decapoda; EDITOR'S CHOICE; Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.); Fundamental and applied biological sciences. Psychology; General aspects; Sea water ecosystems; Synecology; Evaluation; risk assessment; Endangered species; Closure; trade-offs; Conservation; threatened and endangered species; Protected area; Risk analysis; Fishing; Trawl; Marine environment; Fishery; benthic impacts; management strategy evaluation; Ecosystem; Strategy; effects of trawling; marine protected areas; conflicting management objectives; Benthic zone
• ISSN: 0021-8901; 1365-2664
• DOI: 10.1111/1365-2664.12110

1. Spatial management is used extensively in natural resource management to address sustainability and biodiversity issues, for example through declaration of terrestrial National Parks and marine protected areas (MPAs). 2. Spatial management is used also to optimize yields or protect key parts of the life cycle of species that are utilized (hunted, farmed or fished), for example through rotational harvesting. 3. To evaluate the effectiveness of marine spatial closures with conflicting fisheries and conservation objectives, a series of marine fisheries closures are here analysed using an integrative modelling tool known as management strategy evaluation (MSE). 4. This modelling framework combines a food web model of a tropical ecosystem fished by a prawn (shrimp) fishery that emulates the resource being managed, together with the present management system and risk-based tools of fishing the prawn species at maximum economic yield. 5. A series of spatial closures are designed and tested with the aim of investigating trade-offs among biodiversity (MPA), benthic impacts, ecosystem function, key species at risk to fishing, economic and sustainability objectives. 6. Synthesis and applications. This paper illustrates that existing tools often available in actively managed fisheries can be linked together into an effective management strategy evaluation framework. Spatial closures tended to succeed with respect to their specific design objective, but this benefit did not necessarily flow to other broad-scale objectives. This demonstrates that there is no single management tool which satisfies all objectives, and that a suite of management tools is needed.