Growth, feed conversion and body composition of fingerling stinging catfish
            <i>Heteropneustes fossilis</i>
            (Bloch) fed varying levels of dietary
            <scp>l</scp>
            ‐threonine

2020

Aquacult Nutr

Isoleucine requirement of fingerling Channa punctatus (6.74 ± 0.09 g) was estimated by feeding seven trial diets (450 g/kg CP, 14.73 kJ/g DE) containing 3.8, 7.5, 11.3, 15.1, 19.3, 23.2 and 27.4 g/kg of isoleucine for 12 weeks. Growth and haematological parameters increased with the increasing concentrations of dietary isoleucine up to 16 g/kg. Carcass protein and fat increased significantly with the increasing concentrations of dietary isoleucine up to 16 g/kg and then stabilized. Moisture content showed reverse trend to that of carcass fat. Hepatosomatic index was found to be highest at 4 g/kg of dietary isoleucine. Viscerosomatic index and condition factor increased significantly with increasing levels of isoleucine up to 16 g/kg dry diet. Serum protein, lysozyme and superoxide dismutase activities were also found to increase significantly up to 16 g/kg dry diet. Significant reduction in alanine aminotransferase and aspartate aminotransferase activities was observed by increasing concentrations of dietary isoleucine up to 16 g/kg. Based on quadratic regression analysis of absolute weight gain, feed conversion ratio, protein retention and isoleucine retention efficiencies against varying concentrations of isoleucine, the optimum isoleucine requirement ranging between 17.95 and 18.39 g/kg dry diet, corresponding to 39.88–40.86 g/kg dietary protein, is recommended for maximizing growth of C. punctatus.

Section: Experimental Diets and Methods Of Preparationmentioning

confidence: 99%

Effect of dietary isoleucine level on growth, protein retention efficiency, haematological parameter, lysozyme activity and serum antioxidant status of fingerlingChanna punctatus(Bloch)

Sharf

2020

Aquacult Nutr

“…In order to improve its culture, there is a dire need to develop nutritionally balanced feeds requiring information on the mineral requirement of this fish species. Although some fragmentary information on its protein, fat and vitamin requirement exists (Anwar & Jafri, 1992;Farhat & Khan, 2014, 2017Jhingran, 1991;Khan & Abidi, 2011;Khan & Abidi, 2014;Mohamed & Ibrahim, 2001;Siddiqui & Khan, 2009;Singh & Srivastava, 1984;Usmani & Jafri, 2002), no data are yet available on mineral requirement of this fish. In this study, an effort has been made to estimate the optimum dietary phosphorus requirement of this fish species for maximizing growth.…”

mentioning

confidence: 99%

Determination of dietary phosphorus requirement of stinging catfishHeteropneustes fossilisbased on feed conversion, growth, vertebrae phosphorus, whole body phosphorus, haematology and antioxidant status

Zafar

2018

Aquacult Nutr

A 12‐week feeding trial was conducted to determine the dietary phosphorus requirement of Heteropneustes fossilis fingerlings (7.7 ± 0.04 g). Fish were fed casein–gelatine‐based purified diets in triplicate groups near satiation with seven different levels of dietary phosphorus (3.2, 5.2, 7.2, 9.2, 11.2, 13.2 and 15.2 g/kg dry diet). All diets were formulated to be isoproteic (400 g/kg) and isoenergetic (17.89 kJ/g). Highest absolute weight gain (68.38 g/fish), best feed conversion ratio (1.48), protein retention efficiency (30.74%), protein gain (12.44 g/fish), haemoglobin (11.19 g/dL), RBCs (3.12 x106/mm3), haematocrit (33.44%) and serum phosphate (2.82 mg/L) were found at 9.2 g/kg phosphorus. Hepatic superoxide dismutase and catalase activity were also significantly influenced by the dietary phosphorus levels. Whole body and vertebrae phosphorus concentrations increased significantly as the amount of dietary phosphorus increased from 3.2 to 11.2 g/kg dry diet and then plateaued. More accurate information on dietary phosphorus requirement was obtained by subjecting the AWG, FCR, vertebrae phosphorus and whole body phosphorus concentrations data against various levels of dietary phosphorus to broken‐line analysis, which yielded the requirement in the range of 9.0–11.0 g/kg for optimum growth and mineralization of H. fossilis.

“…The amino acid profile of the trial diets was simulated to that of 450g/kg chicken egg protein excepting that of lysine. Diets were prepared as per the method detailed earlier Farhat and Khan M. A. (2017).…”

Section: Preparation Of Experimental Dietsmentioning

confidence: 99%

Requirement of fingerling Channa punctatus (Bloch) for dietary lysine based on growth, feed conversion and lysine retention efficiency, RNA/DNA ratio, haematological parameters and serum antioxidant activity

Sharf

2021

Aquaculture Nutrition

Availability of species-specific nutritionally balanced feeds is the crucial player in determining the economic success and sustainable aquaculture operation. The nutritionally balanced meal must contain an adequate amount to meet the requirement of the species under culture (Ebeneezar et al., 2019). Dietary protein is the most valuable source of essential amino acids (EAAs) required for growth and tissue building (Luo et al., 2006). The inclusion of an optimized amount of quality protein in diets and its deposition in fish could reduce nitrogen waste and production costs (Ebeneezar et al., 2019;Thoman et al., 1999). Although most of the protein of diet is used for growth and development, it is essential to synthesize hormones, antibodies, enzymes and tissues. The quality of dietary protein depends on amino acid composition and utilization. Amino acids are indispensable to protein synthesis (Adesola et al., 2018;Wu et al., 2013). The growth and feed efficiency ratio depends on how close the dietary amino acids are to the requirement. The lack of essential amino acid results in improper utilization of protein and consequently reduces the growth and feed conversion efficiency (Anderson et al., 1995;Dairiki et al., 2007). Hence, information about the dietary amino acids needs is a prerequisite to the formulation of amino acid balanced diets to maximize fish production and prevent the deficiency sign (Glencross et al., 2007).