Effects of dietary protein levels on growth, feed utilization, protein retention efficiency and body composition of young Heteropneustes fossilis (Bloch).
An 8-week growth trial was conducted to assess the effect of dietary protein on growth, feed utilization, protein retention efficiency, and body composition of young Heteropneustes fossilis (10.02 +/- 0.09 g; 9.93 +/- 0.07 cm). Isocaloric (4.15 kcal g(-1), GE) diets with varying levels of protein (25, 30, 35, 40, 45, and 50% of the diet) were fed near to satiation to triplicate groups of fish. Optimum dietary protein was determined by analyzing live weight gain (LWG%), feed conversion ratio (FCR), protein efficiency ratio (PER), specific growth rate (SGR%), and protein retention efficiency (PRE%) data. Maximum LWG% (167), best FCR (1.42), PER (1.75), SGR (1.76), and PRE (31.7%) were evident in fish fed 40% protein diet (Diet 4). Body protein data also supported the above level. However, second-degree polynomial regression analysis of the above data indicated that inclusion of dietary protein in the range of 40-43% is optimum for the growth of young H. fossilis.
Siddiqui
Tabassum Qamar
TQ
Fish Nutrition Research Laboratory, Department of Zoology, Aligarh Muslim University, Aligarh, 202 002, India.
Khan
Mukhtar A
MA
D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects*; D000818:Animals; D017756:Aquaculture / Q000379:methods*; D001823:Body Composition / Q000187:drug effects*; D001835:Body Weight; D002397:Catfishes / Q000254:growth & development* / Q000378:metabolism*; D004044:Dietary Proteins / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D011506:Proteins / Q000378:metabolism*; D012044:Regression Analysis
D004044:Dietary Proteins; D011506:Proteins