Effects of dietary protein levels on growth,feed utilization,protein retention efficiency and body composition of young <Emphasis Type="Italic">Heteropneustes fossilis</Emphasis> (Bloch) |
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Authors: | Tabassum Qamar Siddiqui Mukhtar A Khan |
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Institution: | (1) Fish Nutrition Research Laboratory, Department of Zoology, Aligarh Muslim University, Aligarh, 202 002, India |
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Abstract: | 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. |
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Keywords: | Dietary protein levels Growth Heteropneustes fossilis Protein retention efficiency |
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