【摘要】 采用10种饵料、不同日采收率进行试验,通过观察轮虫的密度和怀卵率变化,比较饵料、日采收率对轮虫生长繁殖的影响。结果表明:⑴采用酵母、光合细菌和小球藻混合饵料,轮虫的密度和怀卵率比单独使用酵母高。轮虫的密度差异极显著(P<0.01),怀卵率差异显著(P<0.05)。投喂第6种饵料时轮虫达到的密度最高,最高密度达2123个/mL,怀卵率也最高,最高达59.9%,轮虫怀卵率高低提前反映轮虫密度的变化。⑵采用酵母、光合细菌和小球藻混合饵料,酵母的不同用量对轮虫密度有极显著影响(P<0.01),酵母最适投喂率为2.0。⑶日采收率20%对提高轮虫培养的密度和怀卵率有显著作用,明显高于10%(P<0.01)。更多还原

【Abstract】 Effects of diets and daily harvesting ratios on the growth and reproduction of Brachionus plicatilis were studied, by observation of the change of the density and fecundity (eggs carried), using 10 different diets and different daily harvesting ratio. The results showed: (1)The density and fecundity rate of B. plicatilis fed on the mixed diets of bread yeast,PSB and Chlorella autotrophica were higher than those fed on bread yeast. The difference of rotifer density between the two group was greatly significant(P<0.01), while the difference of the fecundity was significant (P<0.05). The density and fecundity rate reached the highest when fed on the diet of No. 6 with a density of 2123 individuals/mL and the high average fecundity rate of 59.9%. The change of the density could be reflected predictively by the fecundity of B. plicatilis. (2)The amount of the bread yeast in the mixed diets significantly affected the density of the cultured rotifers with the best ratio of the bread yeast of 2.0 to achieve the highest density(P<0.01). (3)It was more effective of the daily harvesting ratio at 20% to increase the density and fecundity of cultured B. plicatilis, significantly better than the effect of daily harvesting ratio at 10% (P<0.01).更多还原