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青海湖裸鲤放养密度对养殖池塘浮游动物群落结构的影响

  

  1. （1青海湖裸鲤救护中心，青海 西宁 810016； 
    2 青海省青海湖裸鲤繁育与保护重点实验室，青海 西宁 810016）
  • 出版日期:2019-02-20 发布日期:2019-05-13

Impact of stocking density of Gymnocypris przewalskii on community structure of zooplankton in aquaculture ponds#br#

  1. （1Rescue Center of Gymnocypris przewalskii, Xining 810016, Qinghai, China
    2. Key Laboratory of Breeding and Protection of Gymnocypris przewalskii in Qinghai Province, Xining 80016, Qinghai, China）
  • Online:2019-02-20 Published:2019-05-13

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摘要： 为进一步了解青海湖裸鲤养殖池塘中养殖密度与浮游动物群落结构间的关系，通过对不同养殖密度的青海湖裸鲤池塘进行连续的采样调查，测定浮游动物的群落结构、水质指标以及青海湖裸鲤的生长情况。讨论并分析青海湖裸鲤养殖密度对池塘浮游动物群落结构的影响。结果显示：试验期间共测定出浮游动物39种，以轮虫为主，其数量占整个浮游动物种类的61.5%；浮游动物密度、生物量、多样性指数在中、高养殖密度条件下均随着养殖时间的增加呈现下降趋势。研究表明：高密度养殖对浮游动物群落结构影响较大，中、高密度养殖鱼苗对浮游动物的高摄食压力使浮游动物生长受到限制，浮游动物种类减少并趋于小型化，不利于养殖水环境的稳定。

关键词: 青海湖裸鲤, 池塘, 浮游动物, 群落结构

Abstract: In order to know more about the correlations between the stocking densities and the community structure of zooplankton in aquaculture pond of Gymnocypris przewalskii, the community structure of zooplankton, the water quality index and the growth of Gymnocypris przewalskii were determined through continuous sampling survey of Gymnocypris przewalskii ponds with different stocking densities. The impact of stocking densities of Gymnocypris przewalskii on the community structure of zooplankton in ponds was discussed and analyzed. The results showed that 39 species of zooplankton, mainly rotifers, were determined during the experiment, which accounted for 61.5% of the total zooplankton species. The density, biomass and diversity index of zooplankton decreased with the increase of culture time in medium and high density conditions. The study showed that high density breeding had a great impact on the community structure of zooplankton, and the high feeding pressure on zooplankton caused by medium and high density breeding fish fry restricted the growth of zooplankton. The zooplankton species decreased and tended to be miniaturized, which was not conducive to the stability of the aquaculture water environment.

Key words: Gymnocypris przewalskii, ponds, zooplankton, community structure