Replacement of Fish Meal with Fermented Mulberry Leaves Protein in Low Fish Meal Diets for Tilapia(Oreochromis niloticus)

CHEN Wenyan; CHEN Yongjun; PENG Xianghe; LIN Shimei; HUANG Xianzhi; LI Yun

doi:10.3969/j.issn.1006-267x.2015.12.039

2015 , Vol. 27 >Issue 12: 3968 - 3974

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.12.039

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Replacement of Fish Meal with Fermented Mulberry Leaves Protein in Low Fish Meal Diets for Tilapia(Oreochromis niloticus)

CHEN Wenyan ,
CHEN Yongjun ,
PENG Xianghe ,
LIN Shimei ,
HUANG Xianzhi ,
LI Yun

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1. College of Animal Science and Technology, Southwest University, Chongqing 400716, China;
2. Key Laboratory of Freshwater Fish Reproduction and Development of Ministry of Education, Southwest University, Chongqing 400716, China;
3. Institute of Sericulture and Systems Biology, Southwest University, Chongqing 400716, China

Received date: 2015-06-12

Online published: 2015-12-14

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Abstract

In order to study the feasibility of replacement of fish meal with fermented mulberry leaves protein in low fish meal diets for tilapia(Oreochromis niloticus), three isonitrogenous(crude protein content was 32%) and isoenergetic(gross energy was 15 MJ/kg) experimental diets were formulated by replacing 0(control), 40% and 80% fish meal with fermented mulberry leaves protein on basis of a practical diet(fish meal content was 5%), and the corresponding supplemental levels of fermented mulberry leaves protein were 0, 4% and 8%, respectively. Each diet was randomly assigned to 3 replicates of 30 genetically improved farmed tilapia(average body weight about 40 g). The experiment lasted for 8 weeks. The results showed as follows:the final body weight, specific growth rate(SGR) and protein efficiency ratio(PER) in the 80% replacement level group were significantly lower than those in the control group(P<0.05), but there were no significant differences between the 40% replacement level group and the control group(P>0.05). No significant differences were found in feed conversion ratio(FCR) and feeding rate(FR). The fish in the 80% replacement level group had the lowest values of viscera somatic index(VSI), hepatopancreas somatic index(HSI) and serum total cholesterol(TC), triglyceride(TG), low density lipoprotein cholesterol(LDL-C) and blood glucose contents and the highest values of high density lipoprotein cholesterol(HDL-C) content, HDL-C/CHO and HDL-C/LDL-C, and the differences in those indices reached significance level between 80% replacement level group and 40% replacement level group or control group(P<0.05). There were no significant differences in condition factor(CF), and the contents of moisture, crude protein, ether extract and ash in whole body among all groups(P>0.05). In conclusion, the growth is not affected when 40% fish meal replacement with fermented mulberry leaves protein in the low fish meal diet(fish meal content is 5%), and 80% replacement level can inhibit growth, but effectively reduce blood glucose and lipid contents.

Key words： fermented mulberry leaves protein; fish meal; tilapia; growth

Cite this article

CHEN Wenyan , CHEN Yongjun , PENG Xianghe , LIN Shimei , HUANG Xianzhi , LI Yun . Replacement of Fish Meal with Fermented Mulberry Leaves Protein in Low Fish Meal Diets for Tilapia(Oreochromis niloticus)[J]. Chinese Journal of Animal Nutrition, 2015 , 27(12) : 3968 -3974 . DOI: 10.3969/j.issn.1006-267x.2015.12.039

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