【摘要】 应用正交设计方法, 研究了水温分别为(17.8±1.3 )℃和( 23.3±1.9 )℃条件下, 不同饵料和接种密度对褶皱臂尾轮虫(Brachionusplicatilis) 种群增长的影响. 结果表明: 1) 当水温为( 17.8 ±1.3 )℃时, 轮虫密度随接种密度的增加而提高, 而轮虫种群增长率则随接种密度的增加而下降; 2) 当水温为(17.8±1.3)℃时, 饵料和接种密度均对轮虫种群增长具显著影响, 水温为( 23.3 ±1.9)℃时, 饵料对轮虫种群增长具显著影响, 而接种密度对种群增长影响不显著; 3) 这3种生态因子的最佳组合为:水温为( 23.3 ±1.9 )℃、接种密度为轮虫100只/mL、饵料为酵母60g/ (亿个·d).更多还原

【Abstract】 The effect of food and initial population density on the population growth of Brachionus plicatilis by the method of orthogonal design as water temperature was at (17.8±1.3) ℃ and (23.3±1.9) ℃ were studied separately. The results were as follows:1)As water temperature was at (17.8±1.3) ℃, the population density of rotifer grown along with the increase of the initial population density ,but the growth rate of rotifer population reduced along with that oppositely.2) All the food and the initial population density brought the marked influence for the population growth when the water temperature was at (17.8±1.3) ℃.The food also had the marked influence for the population growth,but the initial population density had not obvious effects for that when water temperature was at (23.3±1.9) ℃.3) when water temperature was at (23.3±1.9) ℃,60 g of yeast for a hundred million individuals of rotifer per day and 100 ind/mL of initial population density were the optimum constitute for rotifer in this experiment.更多还原