農業部-水產試驗所全球資訊網農業部-水產試驗所全球資訊網

本研究旨在探討飼料中添加植物油對點帶石斑稚魚成長之影響。各實驗中的蛋白質添加量為50%，油脂混合物添加量則為7%。油脂來源為鱈魚肝油(F)、芥花油(C)、橄欖油(O)、葵花油(S)及亞麻仁油(L)等油，油脂混合物主要成份為50% F和50%其他植物油，植物油設計為L1 (50% L)、LC (25% L + 25% C)、LO (25% L + 25% O)、S1 (50% S)、SC (25% S + 25% C) 和 SO (25% S + 25% O)。試驗共有6個飼料處理組，每一處理組均為3重複，每一重複各為15尾魚點帶石斑 (平均體重6.8 g ± 0.3 g)。經八週的成長試驗期間，顯示整個飼育期間各試驗組石斑魚體的 一般成分分析結果無統計差異(P < 0.05)。而各試驗組魚中，以餵食LC或LO飼料之試驗組魚的體增重率和飼料效率顯著高於其他試驗組者。由本試驗結果顯示點帶石斑魚對18:3n-3和18:2n-6有營養需求，且飼料中添加單元不飽和脂肪酸對點帶石斑魚的成長也有正面效果。
關鍵詞：石斑;飼料;脂肪酸

Six experimental diets were formulated to be iso-nitrogenous (500 g/kg), iso-lipidic (70 g/kg), varying only in their lipid sources (cod liver oil (F), linseed oil (L), sufflower (S) oil, canol oil (C) or olive oil (O). The lipid mixture contain containing 50 % cod liver oil and other vegetable oil source, and designated as L1 (50% L)、LC (25% L + 25% C), LO (25% L + 25% O), S1 (50% S), SC (25% S + 25% C) and SO (25% S + 25% O). Feed were hand fed to homogenous groups of 15 Epinephelus coioides juvenile (mean weight 6.8 ± 0.3 g) per tank in triplicate for 8 weeks, in a recirculation system. Whole-body proximate composition analysis was similar among all the treatments. The growth performance and feed efficiency in the LC and LO treatments were significantly (P < 0.05) higher than those in the other treatments respectively. Based on the results of this trial, suggesting that optimum ratio 18:3n-3 and 18:2n-6 produce better growth, moreover, monounsaturated fatty acid in the diet for E. coioides juvenile, to achieve good growth performance.