连江鱼类资源现状调查及资源衰退原因分析

Investigation of Fish Resources and Analysis of Resources Decline along Lianjiang River

于2005～2006年间对清远市筑坝后连江的鱼类种群结构状况进行了调查。在河流的上游、中游、下游三个江段采样,共采集到鱼类87种,分属于7目18科69属,优势种为亚科(占鲤科总数的29.4%)、鲌亚科(占鲤科总数的15.7%)鱼类。通过与历史资料比较发现,多种适应急流的鱼类、洄游或半洄游性鱼类和产飘浮性卵鱼类已在连江中上游消失,连江鱼类组成、结构和分布已发生了较大的变化。

In order to know the fish group structure after the dam built in Lianjiang River, a lot of investigation had been carried out from 2005 to 2006. 87 freshwater fishes belonging to 7 orders, 18 families and 69 genura were collected from 3 research localities. Pint-sized fishes of Gobioninae （29.4% of Cyprinidae ）and Culterinae （ 15.7 % of Cyprinidae）were preponderant. Compared with the history data, the species, structure and distribution changed greatly.