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测定了不同温度下发头裸腹溞(Moina irrasa)体眠卵的孵化时间及孵化率;取最先孵出和过半数孵出的两组数据依莱奥姆积温法则求得种群休眠卵最低临界温度为12.00℃,最低有效积温为441.61℃·h;最低亚致死高温点(即最适温度)为35.16℃,以及最低死亡高温点39.44℃。种群中过半数的临界温度为12.88℃,过半数有效积温为557.10℃·h,过半数的亚致死高温点为35.56℃以及过半数死亡高温点为39.49℃。讨论了这些参数在枝角类集约化培养中休眠卵的有效保存与启用所具有的实践意义。
The hatching time and hatching rate of the dormant eggs of Moina irrasa were measured at different temperatures. The two groups of data from the first hatching and the over half hatching were found to have the lowest resting eggs The critical temperature is 12.00 ℃, the minimum effective accumulated temperature is 441.61 ℃ · h, the lowest sublethal temperature (ie, the optimum temperature) is 35.16 ℃, and the lowest temperature is 39.44 ℃. More than half of the population had a critical temperature of 12.88 ° C. Most of the effective accumulated temperatures were 557.10 ° C · h. Most of the sub-lethal high-temperature points were 35.56 ° C and the majority were killed at 39.49 ° C. The practical significance of these parameters in the effective preservation and activation of dormant eggs in the intensive culture of Cladocera is discussed.