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Effects of dietary protein levels on growth, feed utilization, protein retention efficiency and body composition of young Heteropneustes fossilis (Bloch)

Fish Physiology and Biochemistry volume 35, pages 479–488 (2009)Cite this article

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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Acknowledgements

The authors are grateful to the chairman of the Department of Zoology of Aligarh Muslim University, Aligarh, India, for providing the necessary laboratory facilities, and to Prof. John E. Halver for supporting the fish nutrition research program at this laboratory. We gratefully acknowledge the financial assistance generous funding received under DST-FIST Programme, New Delhi in the priority area of Fish Nutrition.

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  1. Fish Nutrition Research Laboratory, Department of Zoology, Aligarh Muslim University, Aligarh, 202 002, India

    Tabassum Qamar Siddiqui & Mukhtar A. Khan

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Siddiqui, T.Q., Khan, M.A. Effects of dietary protein levels on growth, feed utilization, protein retention efficiency and body composition of young Heteropneustes fossilis (Bloch). Fish Physiol Biochem 35, 479–488 (2009). https://doi.org/10.1007/s10695-008-9273-7

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Keywords

  • Dietary protein levels
  • Growth
  • Heteropneustes fossilis
  • Protein retention efficiency

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