Proceedings of the Eighteenth Biennial Conference of the International Institute of Fisheries Economics and Trade, held July 11-15, 2016 at Aberdeen Exhibition and Conference Center (AECC), Aberdeen, Scotland, UK.
Suggested Bibliographic Reference: Challenging New Frontiers in the Global Seafood Sector: Proceedings of the Eighteenth Biennial Conference of the International Institute of Fisheries Economics and Trade, July 11-15, 2016. Compiled by Stefani J. Evers and Ann L. Shriver. International Institute of Fisheries Economics and Trade (IIFET), Corvallis, 2016.
The conflict between hydropower production and the free movement of migratory fish in river basins is longstanding. Currently, hydropower is a notable source of renewable energy, and its importance in regulating the seasonal supply of energy, as well as in substituting fossil fuel energy, is considerable. However, once hydropower plants are constructed, the migration of anadromous fish to their reproduction areas is hindered and the river habitat is seriously degraded. Hydropower companies usually compensate these damages by obligatory annual fish releases. However, this measure is not entirely satisfactory, as reared individuals do not always survive as successfully as their wild counterparts. A recent trend in many countries is to shift the focus from stocking to the accommodation of the natural life cycle of the migratory species and to the protection of their routes and habitats. We study this topical problem by developing a numerical bioeconomic optimisation model in order to maximise society's net benefits arising from joint production of hydropower and migratory fish in rivers, which have varying hydropower production potential. For maximisation, we determine temporally optimal combination of measures, which include construction of a fishway, stocking, as well as a ‘trap and transport' method. Society's benefits consist of the hydropower production and its positive climate effects, enhanced opportunities for commercial and recreational fishing, as well as from the existence value of the migratory stock. The costs arise from the implementation of the measures and the loss in electricity production due to diverting water into the fishway.