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The effect of varying dietary digestible protein and digestible non-protein energy sources on growth, nutrient utilization efficiencies and body composition of carp (Cyprinus carpio ) evaluated with a two-factorial central composite study design.
Heinitz, M. C., Figueiredo Silva, C., Schulz, C. and Lemme, A. (2017) The effect of varying dietary digestible protein and digestible non-protein energy sources on growth, nutrient utilization efficiencies and body composition of carp (Cyprinus carpio ) evaluated with a two-factorial central composite study design. Aquaculture Nutrition, 24 . DOI 10.1111/anu.12601.
Full text not available from this repository.Abstract
To determine optimized dietary nutrient supply for common carp (Cyprinus carpio), nine isoenergetic diets were formulated according to a two-factorial central composite design on digestible basis. Digestible protein contents (DP) in diets ranged from 208.8 to 251.2 g/kg, and digestible fat-to-digestible carbohydrate energy ratios (DEF/DEC) varied from 0.79 to 1.21. Carp were fed four times a day at a daily feeding rate of 2.5 g/kg body weight for 56 days. Optima of responses were determined by applying the standard least squares method according to response surface methodology. All diets resulted in excellent performance with feed conversion ratios lower than 1 and digestible protein efficiency ratios (PERdig) higher than 4.6. For most parameters, calculated extreme values were minimum points, except for FCR, retention efficiencies of digestible arginine (RetArgdig) and of digestible methionine (RetMetdig), being maximum points, and retention efficiencies of digestible isoleucine, digestible sulphuric amino acids and digestible lysine, being saddle points. Highest growth and feed utilization efficiency were graphically determined for a diet containing 208.8 g/kg DP/1.21 DEF/DEC. Body lipid was optically increased for 251.2 g/kg DP/0.79 DEF/DEC in comparison with 208.8 g/kg DP/1.21 DEF/DEC.
Document Type: | Article |
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Keywords: | carp central composite design digestible protein energy non‐protein energy sources response surface methodology |
Research affiliation: | Kiel University Kiel University > Kiel Marine Science OceanRep > The Future Ocean - Cluster of Excellence |
Refereed: | Yes |
Open Access Journal?: | Yes |
Publisher: | John Wiley & Sons: Blackwell Publishing |
Projects: | Future Ocean |
Date Deposited: | 21 Dec 2017 12:24 |
Last Modified: | 23 Sep 2019 22:50 |
URI: | https://oceanrep.geomar.de/id/eprint/41092 |
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