摘要
休眠卵萌发实验表明 ,影响蒙古裸腹氵蚤休眠卵萌发的因子有暗反应阶段的因子和光反应阶段的因子。暗反应阶段因子有休眠卵的保存时间和保存处理方式。在 - 4℃下保存 0～ 62d内休眠卵的萌发率随保存时间增加而增加 ,保存 62～ 1 80d内休眠卵的萌发率有略微下降的趋势。保存时间在 62d内 ,保存处理方式以 - 4℃冷冻效果最好 ,萌发率为2 2 0 % ,干燥和干湿循环组次之 ,萌发率分别为 6 0 %和 8 5%。光反应阶段因子有光照、盐度、温度 ,其中光照是休眠卵萌发的首要条件 ,盐度的作用仅次于光照 ,盐度和温度对休眠卵萌发没有交互作用。盐度极显著影响萌发率和萌发速率 ,1～ 1 0为萌发最适盐度 ,1 0盐度组萌发率最高 ;1盐度组萌发速率最快 ,2 0盐度组次之 ,30盐度组最慢。温度只影响萌发速率 ( 30℃温度组萌发速率最快 ,2 5℃温度组次之 ,2 0℃温度组最慢 ) ,但并不影响萌发率。蒙古裸腹氵蚤的生物学零度约为 1 1℃。
The experiment of hatching of ephippial eggs indicated that the factors affecting hatching rate included the length of period of storage and methods of treatment in the dark response process. The hatching rate increased with the length of incubation period between 0 and 62 days, but had slight decline over 62 days The best method of treatment of eggs was perserved in -4℃ for period of 62 days Desiccation and alternative wet-dry cycles also can promote the hatching rate of ephippal eggs.Light, salinity and temperature were the main factors in the light response process. Light was the first necessary factor for the hatching of eggs. Salinity and temperature not only affected the hatching rate, but also affected the rate of development.
出处
《大连水产学院学报》
CSCD
2000年第2期92-97,共6页
Journal of Dalian Fisheries University
基金
国家自然科学基金资助项目 !(3 8970 589)
