Effects of dietary chromium gluconate levels on growth,partial blood biochemical indices and hepatopancreatic antioxidant ability in Koi carp Cyprinus carpio
1.College of Fishery Science, Tianjin Key Laboratory of Aqua-ecology and Aquaculture, Tianjin Agricultural University, Tianjin 300384, China; 2.Tianjin Engineering Center of Ornamental Fish Technology, Tianjin 300042, China; 3. Tianjin Fisheries Research Institute, Tianjin 300042, China
Abstract: Koi carp Cyprinuscarpio L. with initial body weight of (4.18±0.38)g was reared in plastic tanks of each 79 cm×58 cm×48 cm and fed the diets containing chromium gluconate (CrG) at a Cr3+ dose of 0, 0.1, 0.2, 0.4, 0.8, 1.6 and 3.2 mg/kg for 8 weeks at water temperature of 25-28 ℃ with triplication to investigate effects of dietary chromium gluconate levels on growth, partial blood biochemical indices and hepatopancreatic antioxidant ability in Koi carp. Results showed that significantly higher body weight gain (BWG), specific growth rate (SGR), and protein efficiency ratio (PER) and significantly lower food conversion ratio (FCR)were observed in the Koi carp fed the diets containing CrG at a rate of 0.4 mg/kg(P<0.05). The dietary CrG was shown to lead to significant increase in serum total protein (TP) (P<0.05), with significantly lower blood glucose in the Koi carp fed the diets containing CrG at a rate of 0.4-1.6 mg/kg(P<0.05), and without significant differences in triglyceride (TG) and total cholesterol (TC)levels in the Koi carp fed the diets containing CrG at a rate of 0-0.4 mg/kg(P>0.05), and significantly elevated TG and TC levels in the Koi carp fed the diets containing CrG at a rate of over 0.8 mg/kg(P<0.05). The activities of hepatopancreatic superoxide dismutase(SOD), catalase(CAT) and glutathioe peroxidase were shown to increase first and then decrease, with the mixamum in the Koi carp fed the diets containing CrG at a rate of 0.4, 0.8, 1.6 mg/kg (P>0.05), and significantly higher than the fish in the other groups (P<0.05). There were significantly higher contents of malondialdehyde (MDA) in the fish fed the diets containing CrG at a rate of 0.4 mg/kg(P<0.05). The findings indicate that supplementation of can improve growth, and antioxidant ability and decrease level of blood glucose of Koi carp, with optimal Cr3+ dose of 0.24 mg/kg based on growth by a broken-line model.
冯彬彬, 崔培, 王景倩, 尤宏争, 白东清. 葡萄糖酸铬对锦鲤生长、部分血液生化指标及肝胰脏抗氧化指标的影响[J]. 大连海洋大学学报, 2017, 32(5): 544-549.
FENG Bin-bin, CUI Pei, WANG Jing-qian, YOU Hong-zheng, BAI Dong-qing, . Effects of dietary chromium gluconate levels on growth,partial blood biochemical indices and hepatopancreatic antioxidant ability in Koi carp Cyprinus carpio. Journal of Dalian Ocean University, 2017, 32(5): 544-549.
2017, Vol. 32 
