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Bioeconomic Evaluations of Alternative Management Strategies for the New Zealand Otago and Southland Stock of Red Rock Lobster (Jasus edwardsii)

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  • The Otago (CRA 7) and Southland (CRA 8) regions are managed with distinct individual transferable quotas (ITQs) as part of the New Zealand quota management system (QMS). However, for assessment purposes, they are considered as a single stock known as the NSS (North-South Islands - South) rock lobster stock. Currently, a single harvest control rule based on catch per unit of effort (CPUE) in CRA 8 triggers proportional changes in the total allowable commercial catches (TACCs) for both CRA7 and CRA8 while each area keeps distinct TACCs, seasons and size limits. The current management procedure was designed to reach a CPUE based rebuilding target by 2014. We conduct a bioeconomic analysis to contrast the current management system to alternative strategies. These include amalgamation of the two areas into a single quota management area and separate management of the two areas with in-season adjustment of the CRA 7 TACC. We also examined alternative CPUE targets and an alternative procedure for adjusting the TACC once the rebuilding target has been achieved. This analysis combines a spatial, sex and length-structured simulation model of the fishery with an economic module converting catches and effort into revenues and costs. We compare performance of alternative management strategies using a variety of performance indicators including yields and present value of cumulative annual profits. We identify trade-offs between average level and variability of TACCs, and between total revenues and harvests costs. This paper describes the model used, the results of the analysis, and how alternative management strategies were selected.
  • Keywords: management strategies evaluation, lobster, New Zealand, bioeconomics, Theoretical and Empirical Bio-Economic Analysis, Fisheries Economics, ITQs
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  • Lallemand, Philippe, Dan Holland, Nokome Bentley. 2004. Bioeconomic Evaluations of Alternative Management Strategies for the New Zealand Otago and Southland Stock of Red Rock Lobster (Jasus edwardsii). Peer Review: No. In: Proceedings of the Twelfth Biennial Conference of the International Institute of Fisheries Economics & Trade, July 20-30, 2004, Tokyo, Japan: What are Responsible Fisheries? Compiled by Ann L. Shriver. International Institute of Fisheries Economics & Trade, Corvallis, Oregon, USA, 2004. CD ROM. ISBN 0-9763432-0-7
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