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55、美国蝌蚪对水温的要求? 美国蝌蚪能忍耐低温,但不耐高温。当水温升到35℃时,蝌蚪活动力降低,釆食量减少;37℃水温会出现轻度死亡;38℃水温时会发生大量死亡。 56、人工怎样调节水温? 水温对蝌蚪的变态影响很大,水温偏高,蝌蚪变态早且快,但对变态后的幼蛙生长不利,会导致幼蛙个体小,抵抗力弱。 因此,在高温季节培育美国蝌蚪须采取人工降
55, the United States tadpoles on the water temperature requirements? US tadpoles can tolerate low temperatures, but not heat-resistant. When the water temperature rose to 35 ℃, tadpole activity decreased, the amount of food intake decreased; 37 ℃ water temperature there will be mild death; 38 ℃ water temperature will occur when a large number of deaths. 56, artificial how to adjust the water temperature? Water temperature on the metamorphosis of tadpoles great, high water temperature, tadpole metamorphosis early and fast, but unfavorable growth of the metamorphosis of the frogs, will lead to individual frogs, weak resistance. Therefore, artificial tadpoles need to be artificially cultivated during the hot season