研究了涪江合川江段的瓦氏黄颡鳃上的寄生甲壳动物———掘凿鳋的种群周年动态.该鳋的频率在宿主种群中呈负二项分布,其繁殖期为3月下旬至11月中旬,感染率和丰盛度表现出显著的周年变化,春末夏初变化最大. The annual population dynamics of the parasitoid crustacean - digging 鳋 on the gills of Valleys chinensis in the Hechuan section of the Fujiang River was studied.The frequency of this species was negatively binomial distributed in the host population and its breeding period was late March By mid-November, the infection rate and abundance showed significant annual changes, with the greatest changes in late spring and early summer.