Hua, Katheline, Koppe, Wolfgang, and Fontanillas, Ramon (2019) Effects of dietary protein and lipid levels on growth, body composition and nutrient utilization of Channa striata. Aquaculture, 501. pp. 368-373.

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Abstract

Very limited information is available on nutrient requirements of Channa striata, particularly during the grow-out stage. A study was carried out to study the requirement and utilization of protein and lipid by Channa striata growing from 31 g to ~ 200 g. Nine experimental diets with graded levels of dietary protein and lipid were formulated using practical ingredients. Increasing dietary crude protein content from 43.4% to 55.6% at 11% dietary lipid content resulted in increases of weight gain, amount of feed consumed, specific growth rate, and thermal-unit growth coefficient. The crude protein requirement of Channa striata was estimated by the saturation kinetics model to be 51.6% dry matter (DM) for growth and 52.1% DM for protein deposition. On the digestible protein basis, the requirement of Channa striata was estimated to be 47.2% DM for growth and 47.8% DM for protein deposition. Increasing lipid content in diets from 7.5% to 23.1% in this study resulted in linear decreases of fish growth and feed intake. Apparently Channa striata cannot tolerate high dietary lipid levels; lipid levels of >19% DM could negatively affect growth performance. It was also revealed that dietary lipids did not have a protein-sparing effect in Channa striata. Results from this study not only contributes to a better understanding of the nutrient requirement and utilization of Channa striata, but also would be helpful for the development of cost-effective sustainable practical feed formulations for this fish species.

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