Geng Hong, Xi Yilong, Hu Haoyuan
College of Life Science, Anhui Normal University, Wuhu 241000, China.
Ying Yong Sheng Tai Xue Bao. 2003 May;14(5):753-6.
The effects of food component and concentration on the population growth, body size, and egg size of freshwater rotifer Brachionus rubens were studied using population accumulative culture method. The results showed that there were very significant effects of food component and concentration on the population growth rate, body volume and egg volume. Among three types of algal food, the population growth rate of rotifers fed with Chlorella pyrenoidosa was lowest, and that fed with Scenedesmus obliquus was the highest. Rotifers fed with C. pyrenoidosa had the smallest body volume, but there were no significant difference between the two others. The relationship between population growth rate and food concentrations was curvilinear, and it could be described as Y = -0.0040X2 + 0.0409X + 0.4471. The body and egg volumes tended to be smaller, when the food concentrations were higher than 6.0 x 10(6) cells.ml-1 and or lower than 3.0 x 10(6) cells.ml-1.
采用种群累积培养法，研究了食物种类和浓度对淡水轮虫红臂尾轮虫种群增长、个体大小及卵大小的影响。结果表明，食物种类和浓度对轮虫的种群增长率、个体体积和卵体积均有极显著影响。在三种藻类食物中，投喂小球藻的轮虫种群增长率最低，投喂斜生栅藻的轮虫种群增长率最高。投喂小球藻的轮虫个体体积最小，而投喂其他两种藻类的轮虫个体体积无显著差异。种群增长率与食物浓度之间呈曲线关系，可用Y = -0.0040X2 + 0.0409X + 0.4471描述。当食物浓度高于6.0×10(6)个细胞·ml-1或低于3.0×10(6)个细胞·ml-1时，轮虫的个体和卵体积趋于变小。
