Effects of human population density and proximity to markets on coral reef fishes vulnerable to extinction by fishing

Brewer, T.D., Cinner, J.E., Green, A., and Pressey, R.L. (2013) Effects of human population density and proximity to markets on coral reef fishes vulnerable to extinction by fishing. Conservation Biology, 27 (3). pp. 443-452.

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Abstract

Coral reef fisheries are crucial to the livelihoods of tens of millions of people; yet, widespread habitat degradation and unsustainable fishing are causing severe depletion of stocks of reef fish. Understanding how social and economic factors, such as human population density, access to external markets, and modernization interact with fishing and habitat degradation to affect fish stocks is vital to sustainable management of coral reef fisheries. We used fish survey data, national social and economic data, and path analyses to assess whether these factors explain variation in biomass of coral reef fishes among 25 sites in Solomon Islands. We categorized fishes into 3 groups on the basis of life-history characteristics associated with vulnerability to extinction by fishing (high, medium, and low vulnerability). The biomass of fish with low vulnerability was positively related to habitat condition. The biomass of fishes with high vulnerability was negatively related to fishing conducted with efficient gear. Use of efficient gear, in turn, was strongly and positively related to both population density and market proximity. This result suggests local population pressure and external markets have additive negative effects on vulnerable reef fish. Biomass of the fish of medium vulnerability was not explained by fishing intensity or habitat condition, which suggests these species may be relatively resilient to both habitat degradation and fishing.

Item ID: 29596
Item Type: Article (Research - C1)
ISSN: 1523-1739
Keywords: human-environment interaction; modernization; overfishing vulnerability; path analysis; small-scale fishery; social-ecological system
Additional Information:

All supporting online amterial has been combined into a single pdf. Individual files can be found at: http://onlinelibrary.wiley.com/doi/10.1111/j.1523-1739.2012.01963.x/suppinfo

Funders: ARC Centre of Excellence for Coral Reef Studies
Date Deposited: 09 Oct 2013 02:22
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 40%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070403 Fisheries Management @ 30%
16 STUDIES IN HUMAN SOCIETY > 1608 Sociology > 160802 Environmental Sociology @ 30%
SEO Codes: 96 ENVIRONMENT > 9607 Environmental Policy, Legislation and Standards > 960702 Consumption Patterns, Population Issues and the Environment @ 33%
96 ENVIRONMENT > 9607 Environmental Policy, Legislation and Standards > 960707 Trade and Environment @ 33%
97 EXPANDING KNOWLEDGE > 970105 Expanding Knowledge in the Environmental Sciences @ 34%
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