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Why fish use less energy in excreting nitrogeneous wastes than mammals and birds?
Wiki User
∙ 10y ago
Yes, they do. Fish do not need to create urea or uric acid in order to excrete their wastes because they live in water, they can simply excrete the waste out of their gills, which requires less energy than having to create uric acid etc.
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoFish are generally cold blooded, which gives the a low metabolic rate compared with mammals and birds, which are warm blooded. A lower metabolic rate requires less energy and thus less food.
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