不同温度下新安江水域(屯溪段)轮虫种群动态研究  

Population dynamics of Brachionus calyciflorus (Rotifera) from Tunxi section of Xin'an River under different temperatures

作　　者：董丽丽[1] 谢力慧[1] 

机构地区：[1]黄山学院生命与环境科学学院,黄山245041

出　　处：《生态科学》2012年第2期187-191,共5页Ecological Science

基　　金：安徽省教育厅优秀青年人才基金项目(2010SQRL168);黄山学院科研项目(2010xkj001)

摘　　要：温度是决定轮虫生活史特征的重要的生态因子之一。应用生命表统计学方法对采自黄山市新安江水域屯溪段的萼花臂尾轮虫在四种不同温度(15℃、20℃、25℃和30℃)下的生命表统计学特征进行了比较研究。结果表明,萼花臂尾轮虫的存活率和繁殖率在不同温度下存在着差异。四种培养温度下,世代时间在15℃时最长,25℃和30℃时最短且无显著差异;内禀增长率在较低温度下(15℃、20℃)较小,在较高的温度下(25℃、30℃)较大;生命期望和平均寿命均在15℃时最长,其余三个温度下无显著差异。温度对萼花臂尾轮虫的净生殖率和后代的混交雌体百分率无显著影响。Temperature is one of the important ecological factors determining the life history characteristics of rotifers. In the present study, the life history characteristics of Brachionus calyciflorus collected from Tunxi section of Xin＇an River were studied under four different temperatures （15 ℃, 20℃, 25 ℃ and 30 ℃） by means of life table demographic approach. The results showed that the survivorship and the fecundity of B.calyciflorus differed under different temperatures. Under the four cultural temperatures, the generation time of the rotifer was the longest under 15℃ while it was the shortest and had no significant differences under 25℃ and 30℃.The intrinsic rate of population increase of the rotifer was lower under relatively lower temperatures （15℃, 20℃） and larger under relatively higher temperatures （25 ℃, 30℃）. The life expectancy and average lifespan of the rotifer were the longest under 15℃. But there was no significant difference under the rest three temperatures. There were no significant differences on the net reproductive rate and percentage of mictic femaless in offspring of B.calyciflorus.

关 键 词：萼花臂尾轮虫 种群动态 温度 

分 类 号：Q959.181[生物学—动物学]