食物浓度对三个地理品系角突臂尾轮虫种群增长、个体大小和卵体积的影响  

Effects of Food Concentration on Population Growth, and Body and Egg Volume in Three Strains of Brachionus angularis

作　　者：胡好远[1] 席贻龙[1] 耿红[1] 

机构地区：[1]安徽师范大学生命科学学院,安徽芜湖241000

出　　处：《Zoological Research》2002年第5期384-388,共5页动物学研究（英文）

基　　金：安徽省自然科学基金资助项目 ( 10 0 330 );安徽省教委自然科研基金资助项目 ( 2 0 0 0j10 84);安徽师范大学专项科研基金资助项目

摘　　要：以浓度分别为 3 0× 10 6、 6 0× 10 6、 9 0× 10 6和 12 0× 10 6cells/mL蛋白核小球藻 (Chlorellapyrenoi dosa)为食物 ,在温度为 (2 5± 1)℃下 ,应用群体累积培养法研究了食物浓度对分布于长江、珠江和淮河水系的 3个地理品系的角突臂尾轮虫 (Brachionusangularis)种群的增长、个体和卵的体积的影响。结果表明 ,食物浓度、地理品系及两者间的交互作用对轮虫种群增长率、个体和卵的体积均有显著影响。同一食物浓度下 ,广州品系的种群增长率最大 ,芜湖品系的个体和卵体积最大 ;同一品系中 ,当食物浓度为 9 0× 10 6cells/mL时轮虫有较大的种群增长率。各品系轮虫的种群增长率与食物浓度均呈曲线相关 ,但种群增长率达最大时所需的食物浓度在各品系间存在着差异。在食物浓度和品系两因素中 。By means of population accumulative culture and with a green algae Chlorella pyrenoidosa at four food levels (3.0×10 6,6.0×10 6,9.0×10 6 and 12.0×10 6?cells/mL),the effects of food concentration on the body and egg volume,and population growth in freshwater rotifers Brachionus angularis were studied at (25±1)?℃.The rotifers belong to Guangzhou,Wuhu and Yingshang strains collected from the water systems of Zhujiang River,Changjiang River and Huaihe River respectively.The results showed that the body and egg volume,and population growth were affected significantly by food concentration,strain and the interaction of both.At the same food level,the rotifer of Guangzhou strain had the largest population growth rate,and that of Wuhu strain had the largest body volume and egg volume.At the same strain,the population grew fastest while the food concentration was 9.0×10 6?cells/mL.The relationships between the food concentration and population growth rate were all curvilinear in three strains.However,the optimum food concentration for the population growth was different among them.The strain had a more important effect on the rotifer body volume than the food concentration did.

关 键 词：食物浓度 地理品系 角突臂尾轮虫 种群增长率 个体体积 卵体积 

分 类 号：S963.21[农业科学—水产养殖]