SR↑WGR↑Effects of Adding Eucommia Ulmoides P.E and BAs on Shrimp

This experiment aimed to investigate the effects of supplementing Eucommia ulmoides extract and bile acids on the growth performance and immune-related enzyme activities of Penaeus Vanmamei.

The experiment chose Penaeus Vanmamei with a uniform size and an initial body weight of (0.193 ± 0.002)g. They were randomly divided into 4 groups, with 3 replicates per group and 30 shrimp per replicate. The shrimp were fed diets supplemented with 0.3 g/kg Eucommia ulmoides extract (control group), Eucommia ulmoides extract + bile acids (0.3 + 0.08 g/kg),(0.3 + 0.12 g/kg), and (0.3 + 0.16 g/kg). The feeding trial lasted for 6 weeks.

Results

There was no significant difference in the condition factor and feed conversion ratio between the control group and the experimental groups (P>0.05).The hepatosomatic index in the experimental groups was significantly lower than that in the control group, while the survival rate was significantly higher.The weight gain rate in the (0.3 + 0.12) and (0.3 + 0.16) g/kg groups was significantly higher than that in the control group (P < 0.05).

The lysozyme activity in the serum of the control group was significantly lower than that in all experimental groups.In the liver, the control group showed significantly lower lysozyme activity compared to the (0.3 + 0.12) and (0.3 + 0.16) g/kg groups (P < 0.05).

The malondialdehyde (MDA) levels in the serum of the (0.3 + 0.12) and (0.3 + 0.08) g/kg groups were significantly lower than those in the control group.In the liver, the (0.3 + 0.12) g/kg group had significantly lower MDA levels than the control group (P < 0.05).

The glutamic-oxaloacetic transaminase (GOT) activity in the control group was significantly lower than that in the experimental groups.The glutamic-pyruvic transaminase (GPT) activity in the control group was significantly lower than that in the (0.3 + 0.08) and (0.3 + 0.16) g/kg groups (P < 0.05).

Considering the growth performance and immune-related enzyme activity indicators, the (0.3 + 0.12) g/kg combination of Eucommia ulmoides extract and bile acids was determined to be the optimal supplementation level.