Fundamental limitation of TAC as the goal of fishery management
نویسنده
چکیده
TAC, total allowable catch, is always setting to be the goal of fishery management. No matter what TAC is taken to be the goal of fishery management, some fundamental limitation of TAC is required. Generally, dome shape is used to express the relationships between the biomass and net production. There is unique point of biomass having the maximum net production (BMNP). This paper attempts to show that convergent area exists only as biomass larger than BMNP. In convergent area, it is possible to choose a TAC as the goal of fishery management. When biomass is lower than BMNP, they are divergent. In divergent area , any TAC setting to be the goal of fishery management might be failure. Based on Schaefer’s surplus production model, this fundamental limitation of TAC can be proved theoretically.
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