The Bioeconomics of Marine Sanctuaries

被引:63
作者
Conrad J.M. [1 ]
机构
[1] Cornell University, 455 Warren Hall, Ithaca
基金
美国海洋和大气管理局;
关键词
Economics; Fisheries; Optimization; Stochastic simulation;
D O I
10.1023/A:1010039031324
中图分类号
学科分类号
摘要
Consider an offshore fishing grounds of size K. Suppose the grounds has been overfished to the point that net revenue has been driven to zero and the fishery is in open access equilibrium at (X∞, Y∞). A marine sanctuary, where fishing is prohibited, is then created. Suppose the marine sanctuary is of size K2 and that fishing is allowed on a smaller grounds, now of size K1, where K1 + K2 = K. In the first, deterministic, model, the present value of net revenue from the grounds-sanctuary system is maximized subject to migration (diffusion) of fish from the sanctuary to the grounds. The size of the sanctuary is varied, the system is re-optimized, and the populations levels, harvest, and value of the fishery is compared to the 'no-sanctuary' optimum, and the open access equilibrium. In the deterministic model, a marine sanctuary reduces the present value of the fishery relative to the 'ideal' of optimal management of the original grounds. In the second model net growth is subject to stochastic fluctuation. Simulation demonstrates the ability of a marine sanctuary to reduce the variation in biomass on the fishing grounds. Variance reduction in fishable biomass is examined for different-sized sanctuaries when net growth on the grounds and in the sanctuary fluctuate independently and when they are perfectly correlated. For the stochastic model of this paper, sanctuaries ranging in size from 60 to 40% of the original grounds (0.6 ≥ K2/K ≥ 0.4) had the ability to lower variation in fishable biomass compared to the no sanctuary case. For a sanctuary equal to or greater than 70% of the original grounds (K2 ≥ 0.7 K), net revenue would be nonpositive and there would be no incentive to fish.
引用
收藏
页码:205 / 217
页数:12
相关论文
共 13 条
[1]  
Allison G.W., Lubchenco J., Carr M.H., Marine reserves are necessary but not sufficient for marine conservation, Ecological Applications, 8, 1 SUPPL., (1998)
[2]  
Botsford L.W., Castilia J.C., Peterson C.H., The management of fisheries and marine ecosystems, Science, 277, pp. 509-515, (1997)
[3]  
Clark C.W., Mathematical Bioeconomics: the Optimal Management of Renewable Resources (2nd Ed.), (1990)
[4]  
The State of World Fisheries and Aquaculture, (1995)
[5]  
Gordon H.S., Economic theory of a common-property resource: The fishery, Journal of Political Economy, 62, pp. 124-142, (1954)
[6]  
Hall S.J., Closed areas for fisheries management - The case of consolidates, Trends in Ecology and Evolution, 13, 8, pp. 297-298, (1998)
[7]  
Hannesson R., Marine reserves: What would they accomplish?, Marine Resource Economics, 13, pp. 159-170, (1999)
[8]  
Holland D.S., Brazee R.J., Marine reserves for fisheries management, Marine Resource Economics, 11, pp. 157-171, (1996)
[9]  
Holmes B., Biologists sort the lessons of fisheries collapse, Science, 264, pp. 1252-1253, (1994)
[10]  
Lauck T., Clark C.W., Mangel M., Munro G.R., Implementing the precautionary principle in fisheries management through marine reserves, Ecological Applications, 8, 1 SUPPL., (1998)