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Bio-Economic Evaluation of Implementing Selective Gears

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  • The lack of selectivity in many fisheries may lead to discards and bycatch. Discards of under-sized or non-commercial species/individuals represent damage to the eco-system, an additional source of overfishing and a waste of resources. Bycatch may increase fishing pressure on species targeted by other fishermen. The purpose of the paper is to investigate in a bio-economic model the scope for implementing more selective gears in the Danish mixed nephops fishery in Kattegat/Skagerrak. The bio-economic model is developed in such a way that it can illustrate biological changes and the resulting changes in both the profit of fisherman and the net-benefit from a social point of view. The results are based on a detailed biological model, where it is possible to handle both the changes in size- and species composition of catches, landings and discards due to changes in selectivity. The result shows that it is not an advantage to move to gear types that reduces the catches of round- and flatfish significant. The catches of nephrops do also decrease and the resulting improvements in stock biomass do not compensate enough for the overall loss due to the lower catches. However, a general improvement in mesh size improves the overall economic results from the fishery.
  • Keywords: Dansh mixed nephops fishery, Fisheries, Selective gears, Fisheries Economics, Discards and bycatch, Bio-economic evaluation
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  • Vestergaard, Niels, Lone Grønbæk Kronbak, Rasmus Nielsen and Ole Jørgensen. 2008. Bio-Economic Evaluation of Implementing Selective Gears. In: Proceedings of the Fourteenth Biennial Conference of the International Institute of Fisheries Economics & Trade, July 22-25, 2008, Nha Trang, Vietnam: Achieving a Sustainable Future: Managing Aquaculture, Fishing, Trade and Development. Compiled by Ann L. Shriver. International Institute of Fisheries Economics & Trade, Corvallis, Oregon, USA, 2008.
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  • US National Oceanic and Atmospheric Administration (NOAA) Fisheries Division, The Department of Fisheries and Oceans, Canada; Aquaculture CRSP and AquaFish CRSP; Minh Phu Seafood Corporation; Vietnam Datacommunication Company (VDC); Camau Frozen Seafood Processing Import Export Corporation (Camimex); Long Sinh Limited Company; Mai Linh Group and Nam Viet Corporation.
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