The effects of the time delay in biological allowable catch (ABC) calculation on stock management

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  • 生物学的許容漁獲量（ABC）算定における時間遅れの資源管理への影響
  • セイブツガクテキ キョヨウ ギョカクリョウ(ABC)サンテイ ニ オケル ジカン オクレ ノ シゲン カンリ エ ノ エイキョウ

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Abstract

<p>　The total allowable catch (TAC) is determined based on the allowable biological catch (ABC). The ABC of the next year is calculated by applying the harvest control rule to this year's stock assessment results. In consideration of the time delay, it was examined whether the ABC calculation method used so far can manage stocks appropriately. The behaviors of the autumn cohort of Japanese common squid Todarodes pacificus and the Tsushima Warm Current stock of Japanese sardine Sardinops melanostictus were examined when the catch was performed according to the ABC as calculated from the past time. The results show that if the fluctuations in the recruitment per spawning, the fishing mortality coefficient in the previous year of the ABC and the weight at age were large, the management was likely to fail. Therefore, it is important to eliminate the time delay and to conduct a simulation in advance based on the actual situation.</p>

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 87 (2), 89-99, 2021-03-15

    The Japanese Society of Fisheries Science

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