摘要
萼花臂尾轮虫的交配行为大致可分为 5个阶段。除雌雄性比为 1∶ 2和 1∶ 3时混交雌体的受精率为 1 0 0 %外 ,其余性比下混交雌体的受精率皆无显著的差异。可受精的混交雌体百分率和具受精能力的雄体百分率皆随年龄的增大而下降。所有的混交雌体在出生后的 4 h内均易于受精 ;以后随着龄长 ( X,h)的增加 ,可受精的混交雌体百分率 ( Y,% )呈非线性下降 :Y=1 66.6386-1 7.81 3X+0 .4 837X2。当龄长达 1 8h时 ,所有的混交雌体皆不易受精。雄体在出生后的 8h内 ,90 .63%～ 91 .61 %的个体均具有受精能力 ;以后随着龄长 ( X,h)的增加具受精能力的雄体百分率 ( Y,% )呈线性降低 :Y= 1 52 .50 54-6.632 9X。
The mating process of Brachionus calyciflorus may be seperated into five phases.There was no significant effect of sex ratio of female to male between 1∶1 and 6∶1 on the percent fertilization,except that the percent fertilizations were all 100% when the sex ratio was 1∶3 and 1∶2.The percentage of mictic females that could be fertilized and males that were capable of fertilization declined with their aging.All mictic females were susceptible to fertilization until age 4h.Susceptibility declined non linearly according to the quadratic equation Y =166 6386-17 813 X +0 4837 X 2 .By age 18h,all mictic females no longer could be fertilized.Only 90 63%～91 61% of newborn male were capable of fertilization.This level of fertility held until age 8h,then declined linearly: Y =152 5054-6 6329 X There were no significant effects of the sex ratio and the age of the copulating mictic female and male on the number of resting eggs produced by one fertilized mictic female.
出处
《生态学报》
CAS
CSCD
北大核心
2000年第4期541-544,共4页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目 :轮虫休眠卵形成和萌发机理的生态学研究!(编号 39870158)
关键词
萼花臂尾轮虫
年龄
交配行为
受精作用
雌雄性比
Brachionus calyciflorus
sex ratio
age
mating behavior
fertilization
resting egg
