caa a22 4500 605465010 CHVBK 20210128100300.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10499-014-9837-8 doi (NATIONALLICENCE)springer-10.1007/s10499-014-9837-8 Dietary leucine requirement of fingerling Catla catla (Hamilton) based on growth, feed conversion ratio, RNA/DNA ratio, leucine gain, blood indices and carcass composition [Elektronische Daten] [Seemab Zehra, Mukhtar Khan] This study aimed at quantifying leucine requirement of fingerling Catla catla [3.75 (mean body length)±0.15 (SE) cm, 0.66 (mean body weight)±0.04 (SE) g] by conducting a 12-week feeding trial. Six casein- and gelatin-based (33% crude protein, 14.0kJg−1 calculated digestible energy) semipurified diets containing different concentrations of leucine (0.73, 0.97, 1.24, 1.46, 1.74 and 1.97% dry diet) were fed to triplicate groups of fish to apparent satiation thrice daily at 08:00, 12:30 and 17:30 hours. Maximum absolute weight gain (AWG, 7.45g fish−1), protein gain (PG, 1.31g fish−1), leucine gain (LG, 85.33mg fish−1), RNA/DNA ratio (4.62) and best feed conversion ratio (FCR, 1.51) were recorded at 1.74% dietary leucine. Hemoglobin, hematocrit and red blood cell counts count were also found to be optimum in fish fed diet with 1.74% leucine. Quadratic regression analysis at 95% maximum response of AWG and minimum response of FCR against dietary leucine concentrations reflected the requirement at 1.58 and 1.57% dry diet, respectively. Based on above results, inclusion of leucine ranging from 1.57 to 1.58% of the dry diet is recommended for developing leucine-balanced commercial feeds for the intensive culture of C. catla. Springer International Publishing Switzerland, 2014 Leucine nationallicence Growth nationallicence Requirement nationallicence Fingerling nationallicence Catla catla nationallicence Zehra Seemab Fish Nutrition Research Laboratory, Department of Zoology, Aligarh Muslim University, 202 002, Aligarh, India aut Khan Mukhtar Fish Nutrition Research Laboratory, Department of Zoology, Aligarh Muslim University, 202 002, Aligarh, India aut Aquaculture International Springer International Publishing 23/2(2015-04-01), 577-595 0967-6120 23:2<577 2015 23 10499 https://doi.org/10.1007/s10499-014-9837-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10499-014-9837-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zehra Seemab Fish Nutrition Research Laboratory, Department of Zoology, Aligarh Muslim University, 202 002, Aligarh, India aut NATIONALLICENCE 700 1- Khan Mukhtar Fish Nutrition Research Laboratory, Department of Zoology, Aligarh Muslim University, 202 002, Aligarh, India aut NATIONALLICENCE 773 0- Aquaculture International Springer International Publishing 23/2(2015-04-01), 577-595 0967-6120 23:2<577 2015 23 10499