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作 者 ：杨家新

期 刊 ：生态学报 2004年 24卷 8期 页码：1663~1670

关键词：维生素E；萼花臂尾轮虫；密度；卵雌比；混交雌体；

Keywords:vitamin E, Brachionus calyciflorus, population density, egg ratio, mictic female,

摘 要 ：15℃下 ,添加 Ve浓度为 2 0～ 80 ng/ m l时 ,种群密度与培养时间呈显著相关 ,其中 2 0 ng/ ml和 4 0 ng/ ml组最大种群密度分别为 76 .4 0 ind/ ml和 6 5 .2 0 ind/ ml,显著高于对照组 (最大密度 12 .0 0 ind/ ml)。最大混交雌体百分率低于 10 % ,对照组最大混交雌体比率为 4 0 %。轮虫卵雌比有不同程度的提高 ,但维生素浓度为 10 0 ng/ ml时 ,对种群增长不利 ;2 5℃下 ,对照组和各添加组最大密度依次为 6 8.0 0 ,12 2 .0 0 ,12 4 .0 0 ,16 8.0 0和 2 36 .0 0 ind/ ml。最大卵雌比依次为 1.2 1,1.2 5 ,1.2 2 ,1.4 1和 0 .6 9,混交雌体百分比分别为 2 7.6 9,19.89,18.4 2 ,17.0 2和 12 .88% ;30℃下 ,最大密度依次为 113.80 ,12 1.0 0 ,12 2 .80和 15 1.2 0 ind/ ml,最大卵雌比依次为 1.5 0 ,1.4 2 ,0 .6 4和 0 .96。混交雌体百分比分别为1.76,32.26,37.50和32.00%.

Abstract:The change of population density, the ratio of mictic females and eggs of rotifer Brachionus calyciflorus,cultured in the synthetic medium containing different concentrations of vitamin E,were observed at 15, 25 and 30℃, respectively. Rotifer Brachionus calyciflorus was hatched from resting eggs collected from the sediments in bottom of East Lake (China, Wuhan, 114°23′E,30°33′N). A neonate rotifer hatched from resting egg was transferred into flask containing inorganic medium described by Gilbert (1963). St...

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