Effects of Dietary Protein and Energy Levels on Growth,Body Composition and Digestive Enzymes Activities of Juvenile Hybrid Grouper,Epinephelus lanceolatusmale X E.moarafe male

In order to investigate the optimal dietary protein and energy levels of a new juvenile hybrid grouper(Epinephelus lanceolatusmale XE.moarafemale),nine diets were formulated containing three dietary protein levels(46%,50%and 54%crude protein)and three dietary energy levels(20.00 kJ/g,20.50 kJ/g and...

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Bibliographic Details
Published inYuye kexue jinzhan Vol. 39; no. 2; pp. 85 - 95
Main Author Gong, Xupeng
Format Journal Article
LanguageChinese
Published Beijing 01.01.2016
Subjects
Digestive glands
Enzymes
Epinephelus lanceolatus
Marine
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Summary:In order to investigate the optimal dietary protein and energy levels of a new juvenile hybrid grouper(Epinephelus lanceolatusmale XE.moarafemale),nine diets were formulated containing three dietary protein levels(46%,50%and 54%crude protein)and three dietary energy levels(20.00 kJ/g,20.50 kJ/g and 21.00 kJ/g gross energy),the dietary protein-energy ratio was in the range of 22.04 to 26.87 mg/kJ.Juvenile grouper averaging(46.23±0.51)g were fed the test diets for 56 days.The results indicated that the interaction between protein and energy had a significant effect on the weight gain(WG)of grouper(P<0.05),the weight gain rate(WGR)and specific growth rate(SGR)increased with increasing of dietary protein and energy levels(P<0.05).Protein deposition rate(PDR)and hepatosomatic index(HSI)were significantly affected by the interaction between protein and energy(P<0.05).The energy retention rate(ERR)and condition factor(CF)increased with increasing of dietary protein levels(P<0.05),while the protein efficiency ratio(P
ISSN:2095-9869