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在北京双桥鱼场,经三年来研究,鉴定出浮游动物84种,其中轮虫29种。虽然轮虫仅占浮游动物数量的16.87％,但在生物量上,却要占到浮游动物生物量的72.80％,说明轮虫明显地左右着浮游动物生物量的变动。从浮游动物年变动规律分析,一年有1～2次高峰,生物量的高峰多出现在6～7月,占总调查高峰次数的60％。本文还从水质、水温、饵料等因素,分析了对轮虫生物学上的影响,探讨了轮虫和浮游动物生物量之间的相关性,最后对浮游动物等转化鳙鱼鱼产力的估算值与其实际产量进行了比较与分析。
Shuangqiao fish farm in Beijing, after three years of research, identified 84 kinds of zooplankton, of which 29 kinds of rotifers. Although rotifer only accounts for 16.87% of the total number of zooplankton, it accounts for 72.80% of the biomass of zooplankton in biomass, indicating that rotifers obviously affect the variation of zooplankton biomass. According to the annual variation of zooplankton, there are 1 or 2 peaks in a year, and the peak of biomass appears mostly in June and July, accounting for 60% of the total peak survey. In this paper, the biological effects on rotifer were also analyzed from the aspects of water quality, water temperature, food and other factors. The correlation between rotifer and zooplankton biomass was discussed. Finally, the yield of zooplankton The value and its actual output were compared and analyzed.