Affiliation:
1. College of Life Sciences, Huzhou University, Zhejiang Provincial Key Laboratory of Aquatic Bioresource Conservation and Development Technology, Huzhou 313000, China
2. New Hope Liuhe Limited Company, Chengdu, Sichuan 610011, China
Abstract
A 56-day feeding trial was performed to determine the effect of replacing fishmeal with 0, 25%, 50%, 75%, and 100% PBM (FM) on growth performance, digestive enzyme, and immunity of juvenile giant river prawn (Macrobrachium rosenbergii). Diets were fed in quadruplicate (50 prawns per replicate) to satiation (3–5% of their body weight). The finial weight, weight gain, and specific growth rate of prawns were significantly reduced
when 100% PBM was substituted for fish meal, whereas the remaining test diets showed no variation compared to the control
. There was no significant difference in survival rates. The moisture, crude protein, and crude fat of the prawn were unchanged
. The SOD activity, MDA content, and AKP activity of hemolymph did not change significantly. However, the ACP activity of all replacement groups decreased significantly
. The amylase enzyme activity in the intestine of prawn fed 25% of PBM increased significantly compared with the control group, while the trypsin and lipase activities were unchanged. This study showed that PBM up to 75% replacement group does not affect growth performance, and all replacement groups have no adverse effect on intestinal digestive enzyme activity and immunity in juvenile M. rosenbergii. Therefore, poultry by-product meal could replace fish meal by up to 75%.
Funder
National Natural Science Foundation of China