Blar i forfatter "Obeng, Victor"
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Towards an appropriate economic management regime of tuna fisheries in Ghana
Obeng, Victor (Master thesis; Mastergradsoppgave, 2003-06-02)The Ghanaian tuna fishery is a baitboat and purse seine fishery. Three main species of tuna are caught namely, Skipjack, Bigeye and Yellowfin. A detailed and comprehensive set of catch and effort data for the tuna fisheries has been obtained for the period 1980-2001. Harvest functions have been designed and estimated. By maximising the loglikelihood function by numerical methods, parameter ...