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Importance of user cost to the optimal management of multiplecohort fish populations

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  • Doole, Graeme J.
  • Alexander, Robert R.

Abstract

Exploitation frequently reduces the mean age of a fish population, particularly where a lack of property rights stimulates producers to ignore the user cost of harvest. The authors demonstrate that harvesting a young fish bears a significant efficiency cost when the multiple benefits accruing to its protection are recognised. This is magnified when the full complement of year classes within a fish population is considered. These findings identify the importance of protecting older year classes using rights-based management and age/size restrictions, although their successful application can be problematic. In addition, the importance of incorporating more detail in bioeconomic models of multiple-cohort fisheries is highlighted, as underestimating the magnitude of user costs associated with the cropping of younger fish will promote recommendations for inefficient harvest levels. These factors are demonstrated in an application of an optimal control model to the New Zealand longfin eel (Anguilla dieffenbachii) fishery.

Suggested Citation

  • Doole, Graeme J. & Alexander, Robert R., 2005. "Importance of user cost to the optimal management of multiplecohort fish populations," 2005 Conference (49th), February 9-11, 2005, Coff's Harbour, Australia 137839, Australian Agricultural and Resource Economics Society.
    • Handle: RePEc:ags:aare05:137839
    DOI: 10.22004/ag.econ.137839
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    References listed on IDEAS

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    1. R. Quentin Grafton & Leif K. Sandal & Stein Ivar Steinshamn, 2000. "How to Improve the Management of Renewable Resources: The Case of Canada's Northern Cod Fishery," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 82(3), pages 570-580.
    2. Sherry L. Larkin & Gilbert Sylvia, 1999. "Intrinsic Fish Characteristics and Intraseason Production Efficiency: A Management-Level Bioeconomic Analysis of a Commercial Fishery," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 81(1), pages 29-43.
    3. Jon M. Conrad, 1982. "Management of a Multiple Cohort Fishery: The Hard Clam in Great South Bay," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 64(3), pages 463-474.
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