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Estimating MSY and MEY in Multi-Species and Multi-Fleet Fisheries: The Case of the Bay of Biscay Mixed Fisheries

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  • Most fish stocks worldwide are not optimally exploited and are therefore are producing less in biologic and economic terms that what it could be obtained. MSY objective for all the stocks by 2015 is put forward by several countries as management target to be achieved, while other countries such as Australia have moved towards MEY as target. In multi-species and multi-fleet fisheries however single species assessments and MSY and MEY reference points are often not valid. In this paper, we analyze the calculation of MSY and MEY in multi-species and multi-fleet fisheries, applied to the Bay of Biscay demersal fisheries. Estimations of MSY and MEY performed in this paper show that increases of the overall landings and economic performances can be obtained by fishing effort reductions and global selectivity improvements in the Bay of Biscay demersal fishery. In this paper we have also shown the importance of accounting for the multi-fleet nature of the fisheries, and so the capacity to allocate fishing effort between fleets to obtain better yields taking into account joint production processes, various métiers and reallocation of effort (both in production and economic terms). Estimating profitability changes when fishing at MEY and in the current situation of overcapacity and overexploitation offers an estimation of the costs of not fishing at MSY and MEY.
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  • Guillen, J. et al. Estimating MSY and MEY in Multi-Species and Multi-Fleet Fisheries: The Case of the Bay of Biscay Mixed Fisheries. Visible Possibilities: The Economics of Sustainable Fisheries, Aquaculture and Seafood Trade: Proceedings of the Sixteenth Biennial Conference of the International Institute of Fisheries Economics and Trade, July 16-20, Dar es Salaam, Tanzania. Edited by Ann L. Shriver. International Institute of Fisheries Economics and Trade (IIFET), Corvallis, 2012.
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  • This work has been carried out with the support of the French Research Agency, ANR, (Agence National pour la Recherche) through the research program entitled Adhoc; and with support of the French Directorate of Sea Fisheries and Aquaculture of the French Ministry of Ecology, sustainable development and ecology through the partnership on the bioeconomic working group project.AQUAFISH, USAID, NEPAD Planning and Coordination Agency, Norad, The World Bank, Hyatt Regency Dar es Salaam, NAAFE, World Wildlife Fund, United Nations University Fisheries Training Programme, ICEIDA, JICA, JIFRS, The European Association of Fisheries Economists, International Seafood Sustainability Foundation
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