Optimal management of the New Zealand longfin eel (Anguilla dieffenbachii)
Annual recruitment of the New Zealand longfin eel (Anguilla dieffenbachii) has decreased by 75 percent since significant levels of commercial fishing began in the early 1970s. This motivates application of a multiple-cohort bioeconomic model to a New Zealand longfin eel fishery to investigate its optimal management and ascertain the suitability of existing regulatory policy. The use of historical harvest to calculate total allowable catch is asserted to be unsustainable based on recovery dynamics. In addition, individual transferable quota systems are argued to be fundamentally flawed for the protection of longfin fisheries because of high-grading, low-surplus production and a current lack of effective stock-assessment procedures. Area closure and the spatial definition of harvest rights are attractive alternatives given the territoriality of longfins and high larval spillover. The importance of unfished reserves is reinforced when significant uncertainties regarding population strength, harvest intensity and growth dynamics are considered. Restriction of exploitation to older cohorts in fished areas is demonstrated to maximise economic yield. Copyright 2005 Australian Agricultural and Resource Economics Society Inc. and Blackwell Publishing Asia Pty Ltd..
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Volume (Year): 49 (2005)
Issue (Month): 4 (December)
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- Grafton, R. Quentin & Kompas, Tom, 2005.
"Uncertainty and the active adaptive management of marine reserves,"
Elsevier, vol. 29(5), pages 471-479, September.
- Tom Kompas & R. Quentin Grafton, 2004. "Uncertainty and the Active Adaptive Management of Marine Reserves," International and Development Economics Working Papers idec04-2, International and Development Economics.
- Batstone, C J & Sharp, B M H, 1999. "New Zealand's quota management system: the first ten years," Marine Policy, Elsevier, vol. 23(2), pages 177-190, March.
- Newell, Richard G. & Sanchirico, James N. & Kerr, Suzi, 2005. "Fishing quota markets," Journal of Environmental Economics and Management, Elsevier, vol. 49(3), pages 437-462, May.
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