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The economics of size selective harvesting - the case of Barents Sea cod fisheries

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  • Gear technologists have, in recent years, developed rigid sorting grids, Sort-X, in bottom trawls, to improve the size selectivity of this type of gear. Experiments with the Sort-X system in the aft sections of trawls were carried out aboard Norwegian and Russian trawlers along the coast of Northern Norway and in the Barents Sea. This paper uses data from these experiences to analyses the bioeconomic performance of the Sort-X trawl selectivity system, and to compare the results to those of other types of gear and vessels in use. A bioeconomic model, based on a cohort model of the Baranov-Beverton-Holt type, has been designed for tins purpose. Since fishing gear with perfect selectivity is not available, simulation experiments were used to derive the bioeconomic results. Norwegian costs and earnings data were used. The analysis shows that the Sort-X system performs better than traditional trawl, and that the 1995 improvements of Sort-X yield a system which performs better than the 1990-1992 Sort-X. However, the selectivity pattern of large mesh size gillnet used on coastal vessels seems to be superior to the other fisheries.
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  • Andreasson, Stefan, . 1996. The economics of size selective harvesting - the case of Barents Sea cod fisheries. Peer Review: No. In: Proceedings of the Eighth International Conference of the International Institute of Fisheries Economics and Trade, July 1-4, 1996, Marrakech, Morocco. Compiled by Ann L. Shriver. International Institute of Fisheries Economics & Trade, Corvallis, Oregon, USA, 2002. CD ROM.
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