【摘要】 细鳞鱼作为名贵的鲑科陆封型冷水性鱼类,属于国家二级保护动物。近年来我国冷水鱼资源急剧下降,有些种类濒临灭绝。本项研究进行了冷水鱼在鸭绿江上游支流生存繁息的生态环境现状调查和监测,为冷水鱼生存环境提供背景值,同时也为冷水鱼类的人工增养殖和保存冷水鱼物种提供环境方面的科学依据。根据测定结果分析,冷水鱼资源退化的直接原因不是冷水水域水质的恶化,而是人类活动的干扰。更多还原

【Abstract】 Brachymystax lenok is the famous and the only inland cold-water fish of Salmonidae,and the ClassⅡprotected species in China.The resources of coldwater fish have been reducing sharply,even more,some of them are on the verge of extinction.The(research) and monitoring on eco-environmental indices related to cold-water fish in the upper reaches of Yalu River were conducted.As(results,) the background data of cold-water fishes are offered and scientific basis are proposed in order to reproduce and conserve the(valuable) and rare species.The results indicate: It is the interference from human activities which leads to reduction of resources,not the worse of eco-environment.更多还原