A Bioeconomic Analysis of Marine Reserves for Paua (Abalone) Management at Stewart Island,New Zealand |
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Authors: | Viktoria Kahui William Robert James Alexander |
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Institution: | 1.Department of Economics, NFH,University of Troms?,Troms?,Norway;2.Department of Economics,University of Otago,Dunedin,New Zealand |
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Abstract: | Traditional fisheries management relies on the imposition of gear and/or effort restrictions. In spite of much experience
with such techniques, the danger of fishery collapse is ever present. Biologists have advocated an alternative strategy, the
establishment of marine reserves. However, it is possible that the benefits of marine reserve creation can be overstated if
economic behaviour is ignored. In spite of being managed under a system of transferable quotas, the Stewart Island paua (abalone)
fishery has been in decline for some time. We develop an integrated economic and biological model of this fishery and use
it to predict biomass levels in a number of scenarios, including the imposition of a network of no-take areas. We identify
circumstances under which the marine reserve solution outperforms traditional management techniques. We show that the benefit
of a marine reserve is highest when a fishery is heavily exploited and when accounting for stochastic recruitment. |
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Keywords: | Bioeconomic modelling Marine reserves Paua (abalone) fisheries Stochastic recruitment |
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