초록 |
This study is aimed at analyzing the biological and economic effectiveness of quota allocation strategies in the TAC policy under the rebuilding plan. It considers three different quota allocation strategies: constant-catch strategy, constant-fishing mortality strategy, and variable-catch strategy. The change of stock size and the economic effect in each strategy are estimated to be different in response to the change in fishermen's fishing behavior. In the constant catch strategy, the level of fishing effort is decreased as the stock size improves. As a result, the profit is increased as the revenue remains constant and the cost decreases. In the constant fishing mortality strategy, the revenue is increased as the catch increases over time. Because the fishing mortality is fixed, the profit is increased. In the variable catch strategy, both revenue and cost are increased as the level of annual quota increases. Relatively greater profits are gained in the constant catch strategy during the first a few years. However, profits are greater in the constant fishing mortality strategy and variable catch strategy as the amount of catch increases over time. Therefore, for the species whose intrinsic growth rate is high, the constant fishing mortality strategy and the variable catch strategy are more effective, while the constant catch strategy is more beneficial when the intrinsic growth rate is low.
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