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本文应用VPA方法概算黄海鲱鱼1967—1984年各年龄组渔捞死亡、资源数量和实际产卵的亲体数量,结果表明:(1)与太平洋白令海鲱和大西洋北海鲱相比,黄海鲱渔捞死亡高、世代渔捞寿命短;(2)由于世代数量波动剧烈以及捕捞强度过大,资源数量波动幅度很大,并直接影响渔获量;(3)1982年以来出现明显的补充型过度捕捞,实际产卵的亲体数量已下降到正常水平之下。因此,控制渔捞死亡,减少对产卵亲体的捕捞,仍是当前黄海鲱渔业管理中需要认真考虑的问题。 误差分析表明,自然死亡M值的估计精度是提高VPA方法计算精度的关键,文内对此提出相应的建议。
In this paper, the VPA method was used to estimate the fishing deaths, the quantity of resources and the actual number of broodstock in each age group of Yellow Sea herring from 1967 to 1984. The results showed that: (1) yellow sea herring fishing death compared with Pacific Bering herring and Atlantic North Sea herring High, short generation life of fishing; (2) due to dramatic fluctuations in the number of generations and excessive fishing intensity, the amount of resources fluctuated greatly and directly affect the catch; (3) significant supplemental over-fishing since 1982, The actual number of spawning parents has dropped below normal levels. Therefore, controlling fishing deaths and reducing the fishing of spawning bodies is still a serious issue that needs to be seriously considered in the fishery management of yellow herring. Error analysis shows that the estimation accuracy of M value of natural death is the key to improve the calculation accuracy of VPA method. In this paper, the corresponding suggestions are put forward.