Distribution of the enzyme activity in the intestine of beluga Huso huso and Russian sturgeon Acipenser gueldenstaedtii (Acipenseridae)

Data on distribution of digestive enzymes along the intestinal tract of mature specimens of the beluga Huso huso and Russian sturgeon Acipenser gueldenstaedtii are presented. The absence of a distinct proximo-distal gradient of the enzyme activity can be explained by short length of the intestine of sturgeons. Considerable differences are found in the distribution pattern of enzymes along the intestinal tract of beluga and Russian sturgeon. The effect of the method of calculation of the enzyme activity on the data on the proximo- distal gradient is considered. © 2017, Pleiades Publishing, Ltd.