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Title: | 不同蛋白質含量下脂質及 n-3 高度不飽和脂肪酸添加對銀紋笛鯛成長效果之探討 Optimal Dietary Protein, Lipid and n-3 Highly Unsaturated Fatty Acid Levels for Red Snapper Lutjanus argentimaculatus |
Authors: | Mong-Chang Lee 李孟璋 |
Publication Year : | 1996 |
Degree: | 碩士 |
Abstract: | 銀紋笛鯛為本省重要的經濟養殖魚種,至今對此魚種營養需求之研究仍非常有限。本研究探討於飼料中添加不同的蛋白質、脂質及n-3高度不飽和脂肪酸(n-3 HUFA),對銀紋笛鯛於全海水養殖下適當的添加量,實驗結果如下: 1.各飼料組脂質含量相同時,45%蛋白質飼料之增重率、飼料效率均高於40%蛋白質飼料。 2. 40%及45%蛋白質飼料,隨著脂質含量增加,肌肉及肝臟脂質含量亦增加。各飼料組脂質含量相同時,45%蛋白質飼料肝臟脂質含量較40%蛋白質飼料為低。隨著脂質含量增加,肌肉及肝臟n-3 HUFA亦有增加之趨勢。 3.飼料以牛油調整n-3 HUFA於0.9-2.2%之間,0.9% n-3 HUFA飼料組增重率、飼料效率均最低。 4.以1.4% n-3 HUFA飼料組肌肉及肝臟脂質含量均最高,0.9% n-3 HUFA飼料組則最低。 5.肌肉中Σn-3 含量以2.2% n-3 HUFA飼料組較高,1.2% n-3 HUFA飼料組最低。肝臟中Σn-3含量則以2.2% n-3 HUFA飼料組最高,1.2% n-3 HUFA飼料組最低。 實驗結果,銀紋笛鯛於全海水養殖下,飼料中蛋白質在40~45%,脂質9-12%之間為適當添加量。當蛋白質在45%,脂質12%時n-3 HUFA含量在1.6%以上才能滿足銀紋笛鯛之營養需求。 Red snapper is the most important economically valuable aquaculture species in Taiwan. Studies on the nutritional requirements of this species are still lacking. The experiment was conducted to determine a suitable dietary composition for red snapper reared in seawater by feeding with various levels of protein, lipid and n-3 HUFA. The results are as follows: 1. At the same dietary lipid levels, the weight gain and feed efficiency were higher in fish fed diets 45% CP than those fed diets 40% CP. 2. As the dietary lipid increased, the accumulation of lipid in muscle and liver increased in fish fed diets 40% and 45% CP. At the same dietary lipid levels, fish fed diets 45% CP accumulated less lipid in liver than those fed diets 40% CP. With an increase in dietary lipid levels, the n-3 HUFA contents in muscle and liver also increased. 3. When the n-3 HL1FA content in diets were adjusted by beef tallow in the range from 0.9% to 2.2%, the lowest weight gain and feed efficiency were demostrated in fish fed diet 0.9% n-3 HUFA. 4. Fish fed diet 1.4% n-3 HUFA accumulated the most lipid in muscle and liver, that fed diet 0.9% n-3 HLTFA the least. 5. The highest ?n-3 ratio in muscle was demostrated in fish fed diet 2.2% n-3 HUFA. The highest ?n-3 ratio in liver was also found in fish fed diet 2.2% n-3 HUFA, and the lowest in fish fed diet 1.2% n-3 HUFA. These results indicated that the optimal dietary protein and lipid levels for red snapper reared in seawater are 40-45% and 9-12%. The n-3 HUFA contents in diets should be over 1.6% when dietary protein and lipid levels are fixed at 45% and 12%. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/76248 |
Fulltext Rights: | 未授權 |
Appears in Collections: | 漁業科學研究所 |
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