| 摘要: |
| 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 |
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| AN ANALYSIS ON THE DISTRIBUTION, DAMAGE AND EFFECT OF THE NON NET-SETTING SEASON ON YOUNG HAIRTAILS IN THE NET-SETTING REGIONS OF ZHEJIANG COASTAL SEA |
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| Abstract: |
| Analyses of the distribution, damage and the effect of the non net-setting season on young hairtails in the 13 net-setting regions of Zhejiang coastal sea show: 1. The sea off the Zhejiang coast in May-August is the major distribution areas for young hairtails. 9.25 billion of young hairtails are damaged in these four months, account ing for 79.9 percent of average annual damage of 11.73 billion. 2. Theoretically, 0.136 million tons of hairtail will be increased in the winter fishing season after halting the net-setting for two and half a month, and 0.27 billion of spawning hairtails will be increased next year. 3. It is important to stop the net-setting from May to August for the coastal sea off Zhejiang so as to recover the hairtail resource. |
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