Marine Reserves: What Would They Accomplish?
AbstractA marine reserve is defined as a subset of the area over which a fish stock is dispersed and closed to fishing. This paper investigates what will happen to fishing outside the marine reserve and to the stock size in the entire area as a result of establishing a marine reserve. Three regimes are compared: (i) open access to the entire area, (ii) open access to the area outside the marine reserve, and (iii) optimum fishing in the entire area. Two models are used: (i) a continuous-time model, and (ii) a discrete-time model, both using the logistic growth equation. Both models are deterministic equilibrium models. The conservation effect of a marine reserve is shown to be critically dependent on the size of the marine reserve and the migration rate of fish. A marine reserve will increase fishing costs and overcapitalization in the fishing industry, to the extent that it has any conservation effect on the stock, and in a seasonal fishery it will shorten the fishing season. For stocks with moderate to high migration rates, a marine reserve of a moderate size will have only a small conservation effect, compared with open access to the entire area inhabited by a stock. The higher the migration rate of fish, the larger the marine reserve must be in order to achieve a given level of stock conservation. A marine reserve of an appropriate size would achieve the same conservation effect as optimum fishing, but with a smaller catch.
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Bibliographic InfoArticle provided by Marine Resources Foundation in its journal Marine Resource Economics.
Volume (Year): 13 (1998)
Issue (Month): 3 ()
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- Conrad, Jon M., 1997. "The Bioeconomics of Marine Sanctuaries," Working Papers 127880, Cornell University, Department of Applied Economics and Management.
- Homans, Frances R. & Wilen, James E., 1997. "A Model of Regulated Open Access Resource Use," Journal of Environmental Economics and Management, Elsevier, vol. 32(1), pages 1-21, January.
- Hannesson, Rognvaldur, 1986. "The Effect of the Discount Rate on the Optimal Exploitation of Renewable Resources," Marine Resource Economics, Marine Resources Foundation, vol. 3(4).
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