摘要
椭圆卵囊藻培养轮虫时，轮虫平均产卵量均低于4．0个，随着食物浓度增加，后代混交雌体百分率降至12．50％，投喂蛋白核小球藻，轮虫的平均产卵量从6．00增加到11．40个．后代混交雌体百分率降至4．58％，小球藻和卵囊藻混合培养轮虫，轮虫平均产卵量少于5．00个，后代个体混交百分率下降当小球藻浓度增加到8．0×106cclls／mL时，平均产卵量下降至8．33个。
Brachionus calyciforus (Rotatoria) were cultured on single alga Chlorella Pyrenoidosa,Oocystis elliptica, and mixed at densities of 0. 25, 0. 5, 1. 0 and 2.0× 106 cells/mL, respectively. Experiments were conducted at 25℃ in a photoperiod (LD18: 6) with light intensity about 4000 lx. The results show that the average values of eggs produced in medium of Chlorella pyrenoidosa were 6. 00, 6. 75, 11. 20 and 11. 40ind., respectively. The percentages were 23. 06 %,22. 41 %, 8. 52 % ad 4. 85 %, respectively. The mean eggs increased and the percentage decreased with the increases of food concentration.The mean eggs were 3. 33, 3. 33, 2. 33, and 3. 83ind. in medium of Oocystis elliptica, the percentages were 36. 11 %, 30. 55 %, 20. 83 % and 12. 50 %, respectively.The mean eggs per female cultured on mixture medium (mixed Chlorella with the same quantity (Oocystis) were 5. 00, 4. 67, 3. 67 and 4. 67 ind., respectively. The percentages of mictic females were 28. 90 %, 25. 00 %, 16. 67 % and 0 %, respectively.When rotifer growing on medium of chlorella at densities varied from 0. 125×106 to 8×106 cells/mL, the mean eggs increased gradually from 4. 17ind. to 13. 67ind., and the percentages of mictic females decreased from 32. 00%, 25. 00% to 4. 48%. In range of 4. 0×106 to 8. 0×106cells/mL, the mean eggs decreased to 8. 33 ind. (8.0×106cells/mL excluded) and the percentage of mictic female increased to 48. 00% again.The correlation between mictic percentage (Y) and concentration of food (X) was significantly negative in medium of Oocystis (r=-0. 97), and in mixture(r=-0. 99), the equation of regression was Y = 37. 3148 - 13. 1348X (in medium) and Y = 33. 1778 - 16. 5683X (in mixture).
出处
《湖泊科学》
EI
CAS
CSCD
1998年第1期42-48,共7页
Journal of Lake Sciences
基金
国家自然科学基金!39270098
关键词
萼花臂尾轮虫
食物
产卵量
混交百分率
轮虫
Brachionus calyciflorus, Chlorella pyrenoidosa, Oocystis elliptica, mictic female egg
