The hydrolytic activity of four classes of extracellular enzymes was determined in the surface water in three fish farm ponds. These water basins were inhabited by different developmental stages of carp. The ranking order of the mean enzyme activity rates in the studied water basins was as follows: aminopeptidase > lipase > β-glucosidase > α-glucosidase. The level of activity of the tested enzymes differed among the studied ponds. Each hydrolase had its characteristic horizontal profile of activity. The level of extracellular enzyme activity characterised dynamic influenced by the seasons.

中文翻译：

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鲤鱼养殖场池塘水中的细胞外水解酶活性

在三个养鱼场的地表水中测定了四类细胞外酶的水解活性。这些流域居住着鲤鱼的不同发育阶段。在研究的水域中，平均酶活度的排序顺序为：氨基肽酶>脂肪酶>β-葡萄糖苷酶>α-葡萄糖苷酶。被研究的酶的活性水平在所研究的池塘之间有所不同。每种水解酶都有其特征性的水平活性曲线。细胞外酶活性的水平表征了受季节影响的动态。