飼料中添加不同含量的蛋白質與脂質及植物性原料取代魚粉對紅頭金鯛的影響

Abstract

紅頭金鯛(Petenia splendida 'RED')為一種新開發的魚種，其肉質鮮美，粗放式養殖下成長快速，體型可達40公分以上，成魚體色鮮豔，所以潛在市場很大。本研究探討不同含量的蛋白質與脂質及植物性原料的玉米蛋白(Corn protein)取代魚粉對紅頭金鯛成長之影響。 實驗一：在飼料中添加不同含量的蛋白質 45%, 40%及35%與脂質 8%與 13%探討對紅頭金鯛成長之影響。經8 週飼養後以高魚粉組之粗蛋白45%及高脂質組之粗脂質13%的增重率136%，飼料效率為56%為最好。 實驗二：對照組以魚粉61%為主要蛋白質主要蛋白質來源，實驗組以玉米蛋白5%、10%、15%的添加量，而魚粉添加量分別降為56%、51%、41%。 實驗三：不同比例的大豆油與魚油C0組添加8%的大豆油:魚油(3:2)，L1組添加8%大豆油，L2組添加8%的大豆油:魚油(4:1)，L3組為添加8%的魚油。經8 週飼養後飼料中玉米蛋白取代魚粉以10%為上限。在C0(大豆油:魚油=3:2)、L2(大豆油:魚油=4:1)與L3(全魚油)組之間的平均體重、增重率及飼料效率無顯著性差異，因為油脂比例可以使用C0(大豆油:魚油=3:2)為佳。

Giant Cichlid (Petenia splendida 'RED') is a newly developed species with delicious meat. It grow rapidly when extensive farming. It can grow up to 40 cm with beautiful appearance and bright color with huge market potential. An 8-weeks experiment was conduceted to study the effects of dietary protein, lipid levels and vegetative ingredients replacing fish meal on growth performance of Giant Cichlid (Petenia splendida 'RED'). Experiment I: 6 formulated diet with 3 levels of crude protein(CP 45%, 40%, 35%) and 2 levels of crude lipid (CL 8%, 13%) were fed to Giant Cichlid for 8 weeks. The results showed that the best diet with 45% protein and 13% lipid is weight gain 136% and feed efficiency 56%. Experiment II: the examine the replacement of the fish meal with vegetative ingredients at various levels in practical feeds for Giant Cichlid, C5、C10 and C15,replacing fish meal with corn protein by 5%、10%、15%. After 8 weeks feeding trial, the results showed that the optimal replacement ratio of corn protein is 10%. Experiment III:Four diets were supplemented with additional 8% lipid with soybean oil and fish oil : C0(3:2) 、L1(soybean oil ) 、soybean oil and fish oil :L2(4:1)、and L3(fish oil). After 8 weeks feeding, the results showed that experiment groups weight gain and feed efficiency were no significantly differences with soybean oil and fish oil : C0(3:2).