根据1998-1999年东海区虾蟹类资源调查所获的日本资料,以渔获密度表示调查海域日本资源分布的数量指标,定量描述了日本在东海调查海域的数量分布。并根据同年逐月生物学测定资料进行了日本生物学特性的分析研究。结果表明:日本主要分布在31°00′N以北的大沙、长江口渔场,在31°30′N以南很少有分布,底质为沙或泥沙质。高密集区出现在20～30m水深海区,年间最高渔获密度达363.06kg/km2,常年可以进行生产作业,但以秋冬季数量最多,渔获优势甲宽组为45～75mm,雄蟹略大于雌蟹,雌雄蟹周年性比为1∶0.82,繁殖盛期为5-8月,最小抱卵个体甲长为35mm,甲宽为50mm,体重为25g。最后,提出了规定日本最小可捕规格甲宽为50mm,对于甲宽小于50mm者禁止销售,同时应考虑设立禁渔期等合理利用日本资源,加强人工育苗繁殖技术研究、开展增殖放流等有关建议。 According to the data of Japanese shrimp collected from the survey of shrimp and crab resources in the East China Sea from 1998 to 1999, the quantity distribution of Japanese shrews’ resources in the surveyed seas was quantitatively described in terms of the catch density. According to the monthly biological data of the same year, the biological characteristics of Japanese shrews were analyzed. The results showed that the Japanese shrimp were mainly distributed in the Dasha and Changjiang Estuary fisheries north of 31 ° 00’N, rarely distributed south of 31 ° 30’N, and the sediment was sandy or silty sandy. High-density areas appear in 20 ~ 30m water depth sea area, the highest catch density in the year reaches 363.06kg / km2, perennial production operations can be carried out, but the highest number in autumn and winter, catch advantage Jiahuang group is 45 ~ 75mm, Female crab, male and female crab annual ratio of 1:0.82, reproductive peak for the May-August, the minimum length of a spawning armor 35mm, a width of 50mm, weight 25g. Finally, it is proposed to stipulate that the minimum catchable specifications of Japanese catfish should be 50mm wide and forbidden to be sold when their width is less than 50mm. At the same time, they should consider the rational use of Japanese catfish resources such as fishing forbidden period, strengthen the researches on artificial seedling breeding and multiplication, Relevant suggestions.