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Creator:: Arnason, Ragnar
Abstract:: The sustainable yield function is a favoured tool in fisheries policy making. Normally, this function is drawn as a continuous curve in effort-yield space. This means that sustainable yield (harvest) is gradually reduced to zero as fishing effort increases. This, however, does not have to be the case. The sustainable...
Resource Type:: Research Paper
Full Text:: YIELD: THE EXCEPTION OR THE RULE? Ragnar Arnason, Professor, University of Iceland. E-mail: ragnara

Creator:: Guillen, Jordi, Macher, Claire, Merzéréaud, Mathieu, Bertignac, Michel, Fifas, Spyros, and Guyader, Olivier
Abstract:: Most fish stocks worldwide are not optimally exploited and are therefore are producing less in biologic and economic terms that what it could be obtained. MSY objective for all the stocks by 2015 is put forward by several countries as management target to be achieved, while other countries such as...
Resource Type:: Research Paper
Full Text:: sustainable yield (MSY), being 30% of these stocks outside safe biological limits (EC 2009). Estimations of

Creator:: Henriksen, Edgar, Flaaten, Ola, and Eide, Arne
Abstract:: Plankton feeding fish populations on high latitudes have a strong seasonal growth as food only is available when the sun is above the horizon. The rest of the year the biomass will be reduced as a result of natural mortality and reduced weight on each individual. Prices and costs per...
Resource Type:: Other
Full Text:: Microsoft Word - Document1 Title: Maximizing economic yield

Creator:: Mome, Masud Ara and Arnason, Ragnar
Abstract:: The hilsa shad (Tenualosa ilisha) fishery is by far the largest single species fishery in Bangladesh. In this paper, a simple bio-economic year-class based model is developed to describe the fishery and examine its properties. With the help of this model, the optimum sustainable yield of the fishery is calculated...
Resource Type:: Research Paper
Full Text:: properties. With the help of this model, the optimum sustainable yield of the fishery is calculated and

ScholarsArchive@OSU