Abstract
The daily pattern of ammonia nitrogen outputs of five weight groups of Siberian sturgeon, Acipenser baeri (Brandt), was studied. Regardless of weight, there was a delay of 3 h between the start of feeding and the increase in ammonia output. For sturgeon reared at 17°C with continuous feeding, the total ammonia output levels (NH4-N + NH3-N) decreased from 530 mg kg−1 per day for fish weighing 40 g, to 239 mg kg−1 per day for fish weighing 1700 g. The study showed that continuous feeding is suitable in sturgeon farms in terms of ammonia loadings.
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