【摘要】 随着青海湖周边新景区的开发,景区出现了人工投喂青海湖裸鲤亲鱼的现象,这是否会对裸鲤繁殖洄游产生显著负面影响,受到渔业保护部门关注。为了探究景点人工投喂对青海湖裸鲤洄游的影响,文章对2处投喂点进行了调查分析。结果显示,东格尔观景台点滞留亲鱼面积685 m~2,调查点位17个,滞留亲鱼为98 433尾,平均水深63.40±18.33 cm,平均水温17.7±0.05℃,发育Ⅲ期以上的雌鱼比率为0%。圣泉湾(断崖)滞留鱼群的面积为1 224 m~2,调查点位25个,平均水深为80.10±17.43 cm,平均水温19.70±0.07℃,滞留亲鱼为98 960尾,发育Ⅲ期以上的雌鱼比率为24.1%,对就近泉吉河溯河产卵群体的影响率为2.7%。因此,建议对圣泉湾的人工投喂进行必要的管理。更多还原

【Abstract】 The phenomenon of artificial feeding of Gymnocypris Przewalskii in newly developed scenic spots around Qinghai Lake has attracted much attention as to whether it has a significant negative impact on the migration of G. Przewalskii. In order to explore the impact of artificial feeding on the migration of G. Przewalskii in Qinghai Lake,two feeding points were investigated. The results showed that the area of parent fish stranded at the Donggeer viewing platform was 685 square meters, and there were 17 survey sites, with a total of 98,433 fish, an average water depth of 62.55±18.15cm, an average water temperature of 17.7±0.08℃, and a female fish ratio of 0% above the third stage of development. The area of parent fish stranded at Shengquan Bay(cliff) was 1 224 square meters, and there were 25 survey sites,with an average water depth of 71.7±23.8cm, an average water temperature of 19.5±0.24℃, and a total of 98 960 parent fish. The female fish ratio above the third stage of development was 24.1%, with an impact rate of 2.7% on the spawning population of the nearby Quanji River. Therefore, it is recommended to carry out necessary management for artificial feeding in Shengquan Bay.更多还原