caa a22 4500 60546488X CHVBK 20210128100300.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s10499-014-9876-1 doi (NATIONALLICENCE)springer-10.1007/s10499-014-9876-1 Effects of dietary protein levels on growth performance and haemato-immunological parameters of juvenile genetically improved farmed tilapia (GIFT), Oreochromis niloticus [Elektronische Daten] [Mathew Kpundeh, Jun Qiang, Jie He, Hong Yang, Pao Xu] This study evaluated the effect of dietary protein level on growth performance and haemato-immunological parameters of juvenile genetically improved farm tilapia, Oreochromis niloticus, fed five iso-caloric diets of dietary protein levels 25-45%, formulated using white fish, casein, gelatine, soybean, cottonseed and rapeseed meals as protein sources. The diets influenced the significant increase in final weight, condition factor and whole body lipid composition (P<0.05). Conversely, the 25% protein diet resulted in a significantly (P<0.05) lower weight gain and higher feed conversion ratio than the 30-45% protein diets. Protein efficiency ratio and protein retention efficiency of the fish significantly reduced as dietary protein level increased (P<0.05). Meanwhile, hepatosomatic index increased with dietary protein. Haemato-immunological parameters, white blood cell, red blood cell, immune globulin M, superoxide dismutase and lysozyme activity, were not significantly affected by the dietary protein levels (P>0.05). Quadratic regression model, y=−0.493x 2+41.03x+267.3, informed that 41.6% dietary protein supported maximum growth of tilapia juvenile. Fish fed 35% protein diet had a similar growth performance, but better protein utilization than the 40% group. These results demonstrated possibility of reducing protein level in commercial feeds, thus lowering feed costs . Springer International Publishing Switzerland, 2015 GIFT tilapia nationallicence Protein level nationallicence Growth performance nationallicence Feed utilization nationallicence Immunological function nationallicence Kpundeh Mathew Wuxi Fisheries College, Nanjing Agricultural University, 214081, Wuxi, China aut Qiang Jun Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, 214081, Wuxi, Jiangsu, China aut He Jie Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, 214081, Wuxi, Jiangsu, China aut Yang Hong Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, 214081, Wuxi, Jiangsu, China aut Xu Pao Wuxi Fisheries College, Nanjing Agricultural University, 214081, Wuxi, China aut Aquaculture International Springer International Publishing 23/5(2015-10-01), 1189-1201 0967-6120 23:5<1189 2015 23 10499 https://doi.org/10.1007/s10499-014-9876-1 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/s10499-014-9876-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kpundeh Mathew Wuxi Fisheries College, Nanjing Agricultural University, 214081, Wuxi, China aut NATIONALLICENCE 700 1- Qiang Jun Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, 214081, Wuxi, Jiangsu, China aut NATIONALLICENCE 700 1- He Jie Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, 214081, Wuxi, Jiangsu, China aut NATIONALLICENCE 700 1- Yang Hong Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, 214081, Wuxi, Jiangsu, China aut NATIONALLICENCE 700 1- Xu Pao Wuxi Fisheries College, Nanjing Agricultural University, 214081, Wuxi, China aut NATIONALLICENCE 773 0- Aquaculture International Springer International Publishing 23/5(2015-10-01), 1189-1201 0967-6120 23:5<1189 2015 23 10499