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本文运用1981—1983年浙江沿海18个定置张网点周年渔获物调查资料,对浙江沿海张网区的幼带鱼分布、损害及休渔效果作了分析,取得如下结果:1.浙江沿海张网作业区的外侧海区,是幼带鱼重点分布区;5—8月是幼带鱼损害最严重的时段,这4个月平均损害92.5亿尾,占全年平均损害尾数(117.3亿尾)的79.9%。2.目前实施两个半月的张网休渔后,理论上带鱼将会增加136000t冬汛产量,可纯增收1.6亿元,且翌年能增加7.0亿尾的产卵带鱼。3.浙江南、中、北部沿海5—8月依次实行张网休渔是恢复带鱼资源的重要途径。
Based on the survey data of the annual catch of 18 fixed sites in Zhejiang coastal area from 1981 to 1983, the distribution, damage and fishing effect of juvenile fish in Zhangjiakou, Zhejiang Province were analyzed. The results are as follows: 1. The outer sea area of the district is the key distribution area for young juveniles. From May to August, the juvenile larvae were hardest hit, accounting for an average of 9.25 billion haemorrhages in 4 months, accounting for 79.9% of the mean malaise of the entire year (11.73 billion haemorrhages). 2. The current implementation of two and a half months of Zhang net fishing, in theory, octopus will increase 136,000t winter floods yield, net income of 160 million yuan, and the following year to increase 700 million tail-laying octopus. 3. Zhejiang southern, central and northern coastal areas from May to August implemented Zhang net fishing is to recover the octopus resources an important way.