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本文汇集了1981～1987年捕获的1,800余尾江鳕标本的观测数据。以耳石为材料对年龄和生长作了鉴定分析。探讨了该水域江鳕食性变化特点。记述了镜泊湖江鳕冰下溯江作生殖洄游的时间规律。揭示了江鳕属一次性产卵类型的鱼类,产卵期明显集中。少数性腺发育与产卵群体不同步的初次性成熟个体,产卵活动有不规则地延后现象。此与国内流行的卵分批排出,产卵期为11月至翌年3月的文献记述显著有别。
This article brings together the observations of more than 1,800 specimens of Stem Breed collected from 1981 to 1987. With otolith as the material, the age and growth were identified and analyzed. The characteristics of dietary changes of cod in the waters were discussed. Describes the time of law of the migratory river upstream of Gongpohu Dake ice. Revealed a species of codfish spawning one-time type of fish, spawning period was significantly concentrated. A few sexual gonadal development and spawning groups are not synchronized initial maturity of individuals, spawning activities have an irregular delay phenomenon. This and the popular domestic batch of egg excretion, spawning period from November to March next year’s literature significantly different.