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根据专业拖虾调查数据和历史资料,研究了东海日本对虾的数量分布和数量变化,结果表明,调查区日本对虾的年平均渔获率为65.9g/h,夏季时较高,为136.5g/h,其次是春季时,秋、冬季时较低。冬、春季时日本对虾主要分布在26°00′～28°00′N海域,其密集中心位于100m水深区域。夏、秋季时整个调查区都有日本对虾分布,最高站位的渔获率为1000g/h以上,主要出现在夏季,且分布于长江口区和温台渔场区。整个调查区日本对虾最高现存资源量为1360.6t,比20世纪80年代中期的2485t下降了45%。还讨论了日本对虾资源量下降的主要原因和恢复日本对虾资源的主要途径。
According to the survey data and historical data of professional shrimp trawl, the quantitative distribution and quantity change of shrimp in the East China Sea were studied. The results showed that the average annual catch rate of Japanese shrimp was 65.9g / h in summer and 136.5g / h, followed by spring, autumn and winter are lower. In winter and spring, Japanese shrimp are mainly distributed in the sea area of 26 ° 00 ’~ 28 ° 00’N with dense centers located in the depth of 100 m. The distribution of Japanese shrimp was found throughout the survey area in summer and autumn. The catch rate at the top station was above 1000 g / h, mainly in the summer and distributed in the Yangtze Estuary and Wutai fishery areas. The highest available resource of shrimp was 1360.6 tons in the entire survey area, down 45% from 2485 tons in the mid-1980s. Also discussed the main reason for the decline in Japanese shrimp resources and the main ways to restore shrimp resources in Japan.