飼料中添加重組類胰島素成長因子及植物性原料取代魚粉對銀鱸與寶石鱸成長之影響

Abstract

摘要 銀鱸(Bidyanus bidyanus)，俗名silver perch，產於澳洲莫瑞-達令河流流域，寶石鱸(Scortum barcoo)，俗名jade perch，產於澳洲巴庫河流流域，二者屬於廣溫廣鹽及雜食性之澳洲淡水養殖魚種，飼料換肉率高，為台灣新興養殖魚種。本實驗主要為在飼料中添加重組類胰島素生長因子第I、II型，並以植物與動物性蛋白質原料取代魚粉探討對銀鱸與寶石鱸成長之影響。 實驗分為九組，分別為添加60%魚粉之全魚粉組(FM60)，30%魚粉、20%玉米胚芽粕與23%玉米蛋白之半魚粉組(FM30)與0%魚粉、各3%血粉與羽毛粉、10%玉米胚芽粕及51%玉米蛋白之零魚粉組(FM0)，另外分別在飼料中添加含重組類胰島素成長因子IGF-I及IGF-II之大腸桿菌粉末，純度分別為0.4mg/E. coli g與6mg/E. coli g，其添加量分別為0.5g/100g與0.018g/100g，探討對銀鱸與寶石鱸成長之影響。 銀鱸經56天飼養後，添加IGF-I之半魚粉組(FM30-eI0.5)增重率表現最佳，魚體從平均初重1.99g成長至5.31g，增重率166%，飼料效率為45%。此實驗中，半魚粉組(FM30)之飼養結果優於其他組，IGF-I與IGF-II之添加結果無顯著性差異(p<0.05)。 寶石鱸經42天飼養後，添加IGF-I之半魚粉組(FM30-eI0.5)增重率表現最佳，魚體從初重1.6g成長至4.9g，增重率206%，飼料效率為64%，與其他各組呈現顯著性差異(p<0.05)。此實驗中，半魚粉組(FM30)之飼養結果優於全魚粉組(FM60 )與零魚粉組(FM0)，添加IGF-I則優於IGF-II之成長結果。

Abstract Silver perch, Bidyanus bidyanus, and Jade perch, Scortum barcoo, are the native species in Murry-Darling and Barcoo river system, Australia, and freshwater finfish with euryhaline, eurytheraml , omnivorous, and high feed conversion ratio. Regard as having a high potential for aquaculture in Taiwan. The experiment designed fish meal level and recombinant tilapia insulin growth factor type I and type II (IGF-I and IGF-II) to investigate the growth performance of juvenile silver perch and jade perch. Setting for 9 groups in the experiment, FM60 group supplement with 60% fish meal, FM30 group supplement with 30% fish meal, 20% corn germ meal and 23% corn protein, FM0 group supplement with 0% fish meal, 3% blood meal and feather meal , 10% corn germ meal and 51% corn protein. Moreover, supplement with 0.5g/100g recombinant tilapia insulin growth factor type I and 0.018g/100g type II (IGF-I and IGF-II) to experiment groups, respectively. Exp 1st results: After 56 days feeding trial, supplement with IGF-I, results for the FM30-eI0.5 has the best performance with percent weight gain 166%, feeding efficiency 45%. In the experiment, FM30 group growth performance is better than non-supplement with IGFs and supplement with IGF-I between IGF-II is no significant difference (p<0.05). Exp 2nd results: After 42 days feeding trial, FM30-eI0.5 has the best performance with percent weight gain 206%, feeding efficiency 64% , and with significant difference results between other groups (p<0.05). The FM30 group growth performance is better than FM60 group and FM0 group, and supplement with IGF-I growth performance is better than IGF-II.