羽毛肽粉对瓦氏黄颡鱼稚鱼肌肉营养成分的影响

摘要

Effect of a feather peptide meal (FPM) on the nutritional value of the flesh of darkbarbel catfish(Pelteobagrus vachelli) was studied.Five formulated diets with 0, 5, 10, 15, or 20% added FPM were fed to the juvenile fish for 60 d.The randomized feedingin triplicate was carried out on 30 individual fish in each group.The results showed no significant differences, among all feeding groups, in the contents of moisture, lipid, protein or ash(P>0.05) in the fish muscles.The contents of essential amino acids(EAA), non-essential amino acids(NEAA), child amino acids(CAA), total amino acids(TAA) and flavor amino acid(FAA) in the fish fed with 10% added FPM were similar to those in the control group (P>0.05), but higher than other groups with added FPM (P<0.05).At 10% addition level, the scores on Lys, EAAI, AAS and CS of the fish flesh were the highest among all fed with added FPM, and close to those ofcontrol.The ratios of E/T and E/N on the muscle protein were higher whenthe fish were fed with less than 10% FPM (P<0.05).Their relative contents of palm acid were significantly lower than those of fish in the groups having FPM added in feed up to 10% (P<0.05).At less than 15% FPM addition levels, the relative contents of SFA and CIS linoleic acid in the fish flesh decreasedsignificantlywith increasing FPM (P<0.05).Up to 10% FPM, the contents of DHA+EPA, HUFA, PUFA and (n-3)PUFA in the fish were higher than all other groups including control (P<0.05).It was concluded that an addition of 10% of FPM could improve the nutritional value of the edible meat from the juvenile P.vachelli fed with the diet.%以基础饲料中添加5%、10%、15%、20%羽毛肽粉的配合膨化饲料饲养瓦氏黄颡鱼Pelteobagrus vachelli稚鱼60 d,研究其肌肉营养成分的变化规律. 结果显示,羽毛肽粉添加水平在20%范围内时,瓦氏黄颡鱼肌肉常规营养成分(蛋白质、灰分、脂肪、水分)无显著性变化(P>0.05).10%羽毛肽粉添加组黄颡鱼肌肉必需氨基酸、非必需氨基酸、儿童必需氨基酸、氨基酸总量和呈味氨基酸含量均显著高于其他添加组(P<0.05),与对照组无显著性差异(P>0.05).饲料中添加10%羽毛肽粉黄颡鱼肌肉的E/T、E/N均显著低于对照组及其他添加组(P<0.05).羽毛肽粉添加水平达到10%时,瓦氏黄颡鱼肌肉的Lys比值、EAAI值、AAS和CS评分值均最高,而接近于对照组.当饲料中添加10%羽毛肽粉时,瓦氏黄颡鱼肌肉棕榈酸的相对含量显著低于其他添加组与对照组(P<0.05).当羽毛肽粉添加水平在15%范围内时,瓦氏黄颡鱼肌肉的SFA含量和顺式油酸的相对含量随着添加比例的升高而显著下降(P<0.05).当饲料中添加10%羽毛肽粉时,瓦氏黄颡鱼肌肉的DHA+EPA、HUFA、PUFA和(n-3)PUFA含量显著高于其他添加组与对照组(P<0.05).可见,在瓦氏黄颡鱼饲料中适量添加羽毛肽粉,可以显著提高瓦氏黄颡鱼肌肉营养价值.