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根据2003年东海区渔业资源监测网的调查数据,利用单位补充量繁殖力和单位补充量亲鱼资源生物量估算模型,对东海带鱼(Trichiurus japonicusTemminck et Schlegel,1844)渔业资源现状进行分析,结果表明:(1)根据单位补充量繁殖力的估算,当tc=0.5龄、F≥1.15时和当tc=1龄、F≥2.30时,带鱼渔业处在高危险区;而当tc≥1.5龄时,可以承受较大的捕捞压力。(2)根据单位补充量亲鱼资源生物量的估算,当tc=0.5龄、F≥1.22时和当tc=1龄、F≥2.40时,带鱼渔业处在高危险区;而当tc≥1.5龄以上时,可以承受较大的捕捞压力。(3)目前(2003年为例)东海带鱼现行渔业资源状况为:tc=0.5龄、F=2.60,处于高危险区的较高危险点上。因此,在降低现有捕捞强度较难的情况下,建议提高带鱼开捕规格,以便更好地养护东海带鱼,使其资源能得到可持续利用。
According to the survey data of the East China Sea Fisheries Resources Monitoring Network in 2003, the current situation of the fishery resources of Trichiurus japonicus Temminck et Schlegel (1844) was analyzed by using the unit rearing capacity and the unit estimation of broodstock resource biomass. The results showed that: (1) According to the estimated fertility of supplementary unit, when tc = 0.5, F≥1.15 and when tc = 1, F≥2.30, the octopus fishery is in high risk area; when tc≥1.5, Can withstand greater fishing pressure. (2) According to the estimation of the biomass of broodstock, the fish stocks are in high-risk area when tc = 0.5, F≥1.22, tc = 1 and F≥2.40, while when tc≥1.5 Above, you can withstand greater fishing pressure. (3) At present (2003 as an example) The current fishery resources status of octopus in the East China Sea is tc = 0.5 and F = 2.60, which is at the higher dangerous point of the high-risk zone. Therefore, in order to reduce the difficulty of existing fishing, it is proposed to increase the open-sea fishing specifications so as to better conserve the octopus in the East China Sea so that its resources can be used sustainably.