中华鲟的保护生物学研究进展

中华鲟是一种洄游性的鲟科鱼类，平时生活于海洋，亲鲟成熟后溯游到江河里繁殖。在长江葛洲坝修筑以前，中华鲟产卵场位于长江上游和金沙江下游江段。６０－７０年代中期，一些科研单位对上游中华鲟繁殖群体及产卵场等进行了较为全面的调查，撰写出现敢《长江鲟鱼类生物学与人工繁殖研究》，中华鲟的人工繁殖也于１９７１年产首获成功。葛洲坝枢纽建成以后，中华鲟繁殖群体被阻隔于葛洲坝下游宜昌江段，围绕大坝对中华鲟生存带来的不

PROGRESS IN THE CONSERVATION BIOLOGY OF CHINESE STURGEON

The ecological effects of Chinese sturgeon blocked below the Gezhouba Dam and effectiveness of protective measures for the fish were summarized in the paper. After the construction of the Gezhouba Dam,the reproductive stock structure of the sturgeon has been relatively stable. Certain river sections below the dam could meet the spawning demands,and the newly-formed spawning ground has been considered to play a vital role in maintenance of the species' existence. Since the sturgeon commercial fishing was prohibited restrictly along the Yangtze River and the new spawning ground was protected in 1983,the resource of juvenile sturgeon at the estuary and the proportion of fully mature fish in stocks have increased remarkably,Although the Gezhouba Dam does not threaten the existence of the Chinese sturgeon,the direct or indirect impacts of the Three Gorges Dam on the sturgeon should be given high attention.