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The Effect of Temperature on Embryonic Development of Macrobrachium nipponense

Xing Kezhi Liu Maochun(Aquatic Department, Tianjin Agricultural College,Tianjin 300381)  
The paper studies the effect of temperature on embryonic development of Macrobrachium nipponense. In the proper range of temperature, the time for embryonic development of Macrobrachium nipponense shortens as the temperature goes up. At the temperature 22℃, the time needed is the longest ,it is 429.8h, while at 32℃,the time needed is the shortest, only 220.4h. But up to 35℃, the entire embryonic developing can not be finished. Also, within the proper range of temperature, the time for tearing the membrane shortens as the temperature goes up. At 22℃ , the time needed is the longest, it is 10.0h, while at 32℃, the time needed is the shortest, only 5.0h.
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