东海南部锈斑蟳数量分布及生物学特点

The Amount Distribution and Biological Characteristics of Charybdis feriatus in the Southern Part of East China Sea

本文根据1998-1999年在东海南部进行4个季度月的蟹类资源定点调查及近年来生产监测资料，分析了东海南部锈斑蟳（Charybdis feriatus）的数量时空分布和生物学特点。结果表明：锈斑蟳周年渔获量居于各种蟹类第3位，且季节变化较大，冬季渔获量最高，夏季最低；从分布海域看，主要分布在80m以内近海；锈斑蟳群体组成个体大小差异较大，甲宽分布范围为25-150mm，体重分布范围为5-480g。雌性周年性腺成熟度分布以Ⅲ期为主，主要繁殖期在春、夏季。并根据锈斑蟳数量分布及其生物学特点和目前拖网作业捕蟹的情况，提出集中捕“冬蟹”的建议。

based on four season survey data for crab resource from 1998 to 1999 in the southern part of East China Sea and some recent monitoring data, this paper analyzed the amount distribution in time and space and biolagical characteristics of Charybdis feriatus in the southern part of East China Sea. The results showed that the year - round catch of the Charybdis feriatus occupied the third place among all kinds of crabs in the area and fluctuated obviously with seasons. The catch in the winter was the highest and the lowest in the summer. The Charybdis feriatus mainly distributed in the area where the depth was less than 80m. Their body lengths in different individuals were great diversity. The range of carapace width varied between 25 - 150mm and the range of body weight varied between 5 - 480g. The sex gonad for female are in stage Ⅲ for the most of the time in a year. The main breeding season was the spring and the summer. According to their amount distribution, the biological characteristics of the Charybdisferiatus and the status of fishing production, we suggested that the winter is the favourable season for fishing.