葛洲坝枢纽于1981年1月截流后,中华鲟被阻于坝下,不能溯游到上游产卵场。1982年秋季首次发现中华鲟在葛洲坝下自然产卵,至今在坝下的繁衍活动已历时四年。为了进一步了解坝下新形成的中华鲟产卵的效能,客观地评价葛洲坝水利枢纽对中华鲟资源的影响,1982～1985年我们连续四年对长江口崇明地区的中华鲟幼鱼资源状况进行了调查。 After the closure of the Gezhouba Dam in January 1981, the Chinese sturgeon is blocked under the dam and can not be traced back to the upstream spawning grounds. It was the first time in autumn 1982 that Chinese sturgeon naturally spawned under Gezhouba Dam. So far, its multiplication activity under the dam has lasted for four years. In order to further understand the spawning performance of the newly formed Chinese sturgeon under the dam, objectively evaluate the effect of Gezhouba Dam on the resources of Sturgeon, and for the fourth consecutive year 1982 ~ 1985, we conducted a survey on the juvenile Chinese sturgeon survey.