Estimation of the Optimum Dietary Protein to Lipid Ratio in Juvenile Pengze Crucian Carp (Carassius auratus Var. Pengze)

An 8-week feeding experiment was conducted to evaluate the effect of dietary protein to lipid ratio on fish growth performance, digestive enzyme activity, body composition, serum biochemistry, immunity, and antioxidant capacity of Carassius auratus var. Pengze juveniles. Nine experimental diets were...

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Bibliographic Details
Published in:Aquaculture nutrition 2022-08, Vol.2022, p.1-11
Main Authors: Ding, Liyun, Chen, Wenjing, Fu, Huiyun, Xiao, Jun, Fu, Yilong, Ma, Jingjing
Format: Article
Language:English
Subjects:
Antioxidants
Body composition
Carassius auratus
Carp
Cholesterol
Diet
Enzymatic activity
Enzyme activity
Enzymes
Feeds
Fiberglass
Fish
Fish oils
Freshwater fishes
Growth rate
Lipids
Lipoproteins
Moisture content
Nutrition research
Phosphatase
Proteins
Serum
Soybeans
Variance analysis
Vitamins
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Summary:An 8-week feeding experiment was conducted to evaluate the effect of dietary protein to lipid ratio on fish growth performance, digestive enzyme activity, body composition, serum biochemistry, immunity, and antioxidant capacity of Carassius auratus var. Pengze juveniles. Nine experimental diets were formulated in a 3×3 factorial design to contain three protein levels (30%, 35%, and 40%) and three lipid levels (5%, 8%, and 11%), with protein-to-energy (P/E) ratios ranging 19.2–27.1 mg/kJ and named as Diet 1 (30/5), Diet 2 (30/8), Diet 3 (30/11), Diet 4 (35/5), Diet 5 (35/8), Diet 6 (35/11), Diet 7 (40/5), Diet 8 (40/8), and Diet 9 (40/11), respectively. Each diet was randomly assigned to triplicate groups of 20 fish per cylindrical fiberglass tank. The fish fed with Diet 4 had the highest specific growth rate (SGR) among the 9 groups. The whole-body lipid content increased significantly with increasing dietary lipid levels regardless of dietary protein content (P
ISSN:1353-5773
1365-2095
DOI:10.1155/2022/2485134