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A Bio-Economic Simulation Model for the Italian Fisheries

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  • This paper presents a new bio-economic simulation model for the Italian fisheries developed as a part of a project financed by The General Directorate for Fisheries and Aquaculture (under the Italian Ministry of Forestry and Agriculture Policies). The main objective of the model is to measure the effects of different management policies from a biological, economic and social point of view. It is an analytical model composed by four modules and structured into three different dimensions. The managerial, biological, economic and that of state variation are the modules considered. The dimensions taken into account are the temporal dimension, technical dimension related to the fleet and the structural dimension related to the species. The model simulates the sector evolution over the number of years specified by users. The final output is represented by the historical series simulated for the variables included in the logical-conceptual pattern of the model. An overall evaluation of the management measure simulated by the model is also foreseen by output. The evaluation is performed by considering the general economic outcome. This is calculated in terms of net profits, management expenses met by the Public Administration to impose the measure, and social costs due to the measure adopted. The result is then compared to the biological costs measured in terms of biomass variation. The paper also shows an application of the model to the demersal fisheries in the North and Central Tyrrhenian Sea (FAO Geographical Sub Area (GSA) 9) using economic data available from the IREPA monitoring system, and biological data estimated by means of trawl-survey (MEDIT and GRUND programmes). Two simulation scenarios are analysed. They are related to management measures based on restrictions of fishing effort: capacity reduction plans, and temporary withdrawal. The effects of these management measures are compared and evaluated.
  • KEYWORDS: Bioeconomic Modelling, Multi-gear, Multi-species, Simulation, Technical Interactions
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  • Accadia, Paolo and Massimo Spagnolo. 2006. A Bio-Economic Simulation Model for the Italian Fisheries. In: Proceedings of the Thirteenth Biennial Conference of the International Institute of Fisheries Economics & Trade, July 11-14, 2006, Portsmouth, UK: Rebuilding Fisheries in an Uncertain Environment. Compiled by Ann L. Shriver. International Institute of Fisheries Economics & Trade, Corvallis, Oregon, USA, 2006. CD ROM. ISBN 0-9763432-3-1
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  • The National Oceanic & Atmospheric Administration Marine Fisheries Service, United States Department of Commerce (NOAA Fisheries); United Kingdom Department for Environment, Food and Rural Affairs (DEFRA); The United States Agency for International Development supported Aquaculture Collaborative Research and Support Program (ACRSP).
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