Dietary Supplementation of Insulin Like Growth Factor-I Analog Improves Glucose Utilization in Juvenile Hybrid Tilapia Oreochromis niloticus × O. aureus

飼料中添加類胰島素生長因子-I類似物可促進雜交吳郭魚（Oreochromis niloticus × O. aureus）對葡萄糖之利用性

10.29822/JFST.201306_40(2).0005

蕭錫延(Shi-Yen Shiau)；陳湘穎(Hsiang-Yin Chen)；林鈺鴻(Yu-Hung Lin)

吳郭魚 ； 類胰島素生長因子-I ； 葡萄糖利用性 ； 營養 ； 生理 ； Tilapia ； IGF-I ； Glucose utilization ； Nutrition ； physiology

臺灣水產學會刊

40卷2期（2013 / 06 / 01）

125 - 133

英文

To evaluate the effect of insulin-like growth factor-I (IGF-I) analog (peptide with 10 amino acids) on carbohydrate utilization of juvenile hybrid tilapia Oreochromis niloticus × O. aureus, fish meal basal diet containing either starch (S) or glucose (G) as carbohydrate source supplemented with IGF-I peptide (S+P and G+P) for total of 4 experimental diets each was fed to triplicate groups of tilapia (initial body wt: 0.63 ± 0.02 g) in a recirculated rearing system for 8 wks. Fish fed S, S+P and G+P diets had significantly (p ＜ 0.05) higher weight gain (WG), feed efficiency (FE) and protein efficiency ratio (PER) than fish fed the G diet. Plasma glucose concentration in fish fed G diet was higher than that in fish fed the S and S+P diets. Hepatic hexokinase, phosphofructokinase, glucose-6-phosphatase, malic enzyme and glucose- 6-phosphate dehydrogenase activities were similar in all dietary groups. The result suggests that dietary supplementation of IGF-I analog peptide improves glucose utilization in tilapia.

To evaluate the effect of insulin-like growth factor-I (IGF-I) analog (peptide with 10 amino acids) on carbohydrate utilization of juvenile hybrid tilapia Oreochromis niloticus × O. aureus, fish meal basal diet containing either starch (S) or glucose (G) as carbohydrate source supplemented with IGF-I peptide (S+P and G+P) for total of 4 experimental diets each was fed to triplicate groups of tilapia (initial body wt: 0.63 ± 0.02 g) in a recirculated rearing system for 8 wks. Fish fed S, S+P and G+P diets had significantly (p ＜ 0.05) higher weight gain (WG), feed efficiency (FE) and protein efficiency ratio (PER) than fish fed the G diet. Plasma glucose concentration in fish fed G diet was higher than that in fish fed the S and S+P diets. Hepatic hexokinase, phosphofructokinase, glucose-6-phosphatase, malic enzyme and glucose- 6-phosphate dehydrogenase activities were similar in all dietary groups. The result suggests that dietary supplementation of IGF-I analog peptide improves glucose utilization in tilapia.