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Dietary arginine requirement of fingerling hybrid Clarias ( Clarias gariepinus× Clarias macrocephalus).
- Source :
-
Aquaculture Research . Jan2007, Vol. 38 Issue 1, p17-25. 9p. 3 Charts, 3 Graphs. - Publication Year :
- 2007
-
Abstract
- The dietary arginine requirement of fingerling hybrid Clarias ( Clarias gariepinus× Clarias macrocephalus) (4.2±0.03 cm, 0.56±0.04 g) was determined by feeding six isonitrogenous (400 g kg−1 crude protein) and isocaloric (17.9 kJ g−1) amino acid test diets containing casein, gelatin andl-crystalline amino acids with graded levels of arginine (10.0, 12.5, 15.0, 17.5, 20.0 and 22.5 g kg−1) for 4 weeks to triplicate groups. Diets were fed twice a day at 09:00 and 16:00 hours at 8% body weight day−1. Maximum weight gain (523%), best feed conversion ratio (FCR, 1.41), protein efficiency ratio (1.78) and specific growth rate (6.53%) were recorded in fish fed the diet containing arginine at 20.0gkg−1 of the diet. Second-degree polynomial regression analysis of live weight gain and FCR values indicated the dietary arginine requirement at 17.8 and 20.0 g kg−1 of dry diet respectively. Significantly higher carcass protein and protein deposition values were recorded at the requirement level (20.0 g kg−1). Higher fat and lower moisture values were obtained in carcass of fish fed the diet with 15.0g kg−1 arginine. The maximum carcass ash value was noticed in the fish fed at 20.0 g kg−1 dietary arginine. We recommend that the diet for hybrid Clarias ( C. gariepinus× C. macrocephalus) should contain arginine in the range of 17.8–20.0 g kg−1 of the dry diet, corresponding to 44.5 and 50 g kg−1 of dietary protein respectively. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1355557X
- Volume :
- 38
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Aquaculture Research
- Publication Type :
- Academic Journal
- Accession number :
- 23573557
- Full Text :
- https://doi.org/10.1111/j.1365-2109.2006.01618.x