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持续高强度的捕捞已经严重影响到渔业资源的可持续利用,其对渔业资源的最直接和明显的影响就是资源量的减少。本文对不同捕捞强度作用下,不同生活史和补充量的单鱼种群体的资源量在短期内(1~3a)的变动进行了模拟研究。结果表明,受捕捞影响,鱼类群体资源量在周年内逐渐减少,但短寿命种类的资源量比寿命较长的种类更易恢复。年补充量和捕捞强度都会对资源量的恢复产生影响,其中补充量的影响更为显著。模拟研究过程中考虑了3个半月伏季休渔措施的影响,结果显示伏季休渔并未对资源恢复起到明显的作用。因此,应该强调伏季休渔的科学依据,在伏季休渔实施的同时,加强捕捞强度的控制,使每年能够有足够的补充群体。
Sustained high-intensity fishing has seriously affected the sustainable use of fishery resources. Its most direct and obvious impact on fishery resources is the reduction of resources. In this paper, we simulate the changes of resources of single species with different life histories and supplements under different fishing intensities in the short term (1-3 years). The results showed that due to fishing, the fish population decreased gradually during the year, but the short-lived species had more resources than the longer-lived ones. Both annual supplementation and fishing intensity will have an impact on the recovery of resources, of which the impact of supplementation is even more pronounced. The impact of the three and a half months of summer off-take was considered in the simulation study. The results showed that the summer off-season did not play a significant role in resource recovery. Therefore, we should emphasize the scientific basis for the moratorium on fishing off-season and at the same time enforcing the moratorium on fishing, strengthen the control of fishing intensity so that enough supplementary groups can be provided each year.