Effects of brown fish meal replacement with fermented soybean meal on growth performance, feed efficiency and enzyme activities of Chinese soft-shelled turtle, Pelodiscus sinensis |
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Authors: | Yurong Zou Qinghui Ai Kangsen Mai Wenbing Zhang Yanjiao Zhang Wei Xu |
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Institution: | The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, P. R. China |
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Abstract: | A 120-day feeding experiment was conducted to investigate the effects of partial replacement of brown fish meal (BFM) by fermented
soybean meal (FSBM) in diets of Chinese soft-shelled turtle (Pelodiscus sinensis). The turtles (initial mean body weight, (115.52 ± 1.05) g) were fed with three experimental diets, in which 0%, 4.72% and
9.44% BFM protein was replaced by 0%, 3% and 6% FSBM, respectively. Results showed that the feeding rate (FR), specific growth
rate (SGR) and feed efficiency ratio (FER) of turtles fed with the diet containing 3% FSBM were not significantly different
from the control group (0% FSBM) (P > 0.05). However, FR, SGR and FER of turtles fed with the diet containing 6% FSBM were significantly lower than those of
the control group (P < 0.05). No significant differences were observed in the activities of serum glutamic-oxalacetic transaminase and glutamic-pyruvic
transaminase among dietary treatments (P > 0.05). However, the uric acid concentration in turtles fed with the diet containing 3% or 6% FSBM was significantly lower
than that in the control group (P < 0.05). There were no significant differences in the activities of lysozyme, alkaline phosphatase and total superoxide dismutase
among dietary treatments (P > 0.05). The results suggested that FSBM could replace 4.72% BFM protein in turtle diets without exerting adverse effects
on turtle growth, feed utilization and measured immune parameters. |
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Keywords: | Chinese soft-shelled turtle Pelodiscus sinensis brown fish meal replacement fermented soybean meal |
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