在夏天鱼为什么要浮到水面上呼吸
在夏天鱼为什么要浮到水面上呼吸
化学人气：197 ℃时间：2020-03-24 02:51:15
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水塘中大量的鱼浮到水面并大口呼吸时,往往预示着即将下大雨.因为要下雨的地方,往往大气压 降低,使氧气在水中的溶解氧不足,迫使鱼类上浮到水面进行呼吸.但这种情况往往在夏天快下雨的鱼塘出现,而在冬天快下雨的水塘则...
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