温度和食用藻密度对发头裸腹溞种群动态和两性生殖的影响  

Effects of water temperature and edible algal density on the population dynamics and sexual reproduction of Moina irrasa.

作　　者：李玉颖[1,2] 邓道贵[1] 雷娟[1] 席贻龙[2] 

机构地区：[1]淮北师范大学生命科学学院,安徽淮北235000 [2]安徽师范大学生命科学学院,安徽芜湖241000

出　　处：《应用生态学报》2011年第12期3337-3342,共6页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(31070387);安徽省教育厅自然科学研究项目(KJ2010A300;KJ2008B059)资助

摘　　要：研究了不同温度和食用藻密度对发头裸腹溞种群动态和两性生殖的影响.结果表明:温度、食用藻密度对发头裸腹溞的种群密度、雄体密度和卵鞍数均有显著影响.高食用藻密度组的发头裸腹溞种群密度明显高于中、低食用藻密度组,其最大种群密度出现在20℃下的高食用藻密度组.在相同的温度下,发头裸腹溞的首次产幼溞数随食用藻密度的降低而减少,平均每个母溞首次产出的最大幼溞数出现在25℃下的高食用藻密度组.高食用藻密度组发头裸腹溞产生的雄体密度明显高于中、低食用藻密度组.发头裸腹溞的雄体密度与其种群密度之间存在极显著的相关性.发头裸腹溞所产的卵鞍数随食用藻密度的下降而下降,且25℃下发头裸腹溞所产的卵鞍数明显高于其他温度组.与温度相比,食用藻密度对发头裸腹溞的种群动态和两性生殖的影响更大.This paper studied the population dynamics and sexual reproduction of Moina irrasa at different water temperature and edible algal density.The population density of M.irrasa was obviously higher at high than at medium and low densities of edible algae,with the maximum at high edible algal density and 20 ℃.At the same temperatures,the average number of the offsprings first produced by per female M.irrasa declined with decreasing edible algal density,and the maximum value appeared at 25 ℃ and at high edible algal density.The male offsprings produced were obviously higher at high than at medium and low edible algal densities.There was a significant correlation between the male density and the population density of M.irrasa.The number of ephippia produced by M.irrasa declined with decreasing edible algal density,and was higher at 25 ℃ than at other temperatures.Edible algal density had larger effects on the population dynamics and sexual reproduction of M.irrasa,as compared with temperature.

关 键 词：发头裸腹溞 食用藻密度 种群动态 雄体 卵鞍 

分 类 号：Q958[生物学—动物学]