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 m2,调查点位17个,滞留亲鱼为98433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1224 m2,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98960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。
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 1224 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 98960 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.
作者
祁洪芳
罗颖
闫丽婷
付生云
杨海乐
Qi Hongfang;Luo Ying;Yan Liting;Fu Shengyun;Yang Haile(Gymnocypris Przewalskii Rescue Center,Xining 810016,China;Qinghai Provincial Key Laboratory of Gymnocypris Przewalskii Breeding and Protection,Xining 810016,China;Shanghai Aquatic Wildlife Conservation and Research Center,Shanghai 202162,China)
出处
《青海科技》
2025年第2期172-178,共7页
Qinghai Science and Technology
基金
国家科技资源共享服务平台建设运行项目“国家淡水水产种质资源库-青海湖裸鲤救护中心(2025年)”
青海省重点研发与转化计划科技成果转化专项项目“青海湖裸鲤PIT标志关键技术的放流效果评估和洄游示范监测”(2024-SF-152)。
关键词
青海湖裸鲤
景区投喂
滞留鱼量
洄游影响
Gymnocypris Przewalskii
Feeding in scenic areas
Fish retention
Migration impact
