8 Hy-Line Brown cocks and 8 Peking drakes with the same weight and age(18 weeks) were slaughtered after fasting 8 h to compare the pH in digestive tract and digestive enzyme between cock and drake.

Effects of toxic microcystis on the growth,activities of digestive enzymes and accumulation of microcystin in Carassius auratus;

Effects of Phytase and Multienzyme on the Activities of Digestive Enzyme, Apparent Digestibility of Crude Protein and Phosphorus of Bluntsout Bream;

Influence of exogenous enzymes on endogenous digestive enzyme activity of weaned rabbit fed with different nutritional type diet;

Variations in digestive enzyme activity and tissue biochemical composition of Penaeus chinensis broodstock during reproductive cycle;

4% enzyme preparations were added respectively in the experimental group 1 and 2 on the basis of diet of the control group;on 28th day,the goslings were slaughtered for determining the viscosity,pH value and digestive enzyme activity of the intestinal chyme.

The growth of Allogynogenetic crucian and activity of digestive enzyme were determined.

The weight of the tilapia and activity of digestive enzyme were determined.

The effects of dietary protein sources on the growth and activities of digestive enzymes of giant freshwater prawn (Macrobrachium rosenbergii) are studied.

Effect of salinities on digestive enzyme activities of juvenile Litopenaeus vannamei Boone;

Effects of starvation on digestive enzyme activities of Monopterus albus.;

Effects of dietary protein levels on growth performance and digestive enzyme activities of jade perch Scortum bacoo;