中文摘要：

通过56d喂食添加带鱼酶解蛋白亚铁螯合物（Fe（Ⅱ）-FPH）的饲料观察凡纳滨对虾（Litopenaeus vannamei）的生长性能、免疫相关指标及品质的变化。Fe（Ⅱ）-FPH在饲料中的添加量分别为0、500、1000、1500、2000、2500mg/kg,不同饲料组分别设4个重复,每个重复40尾对虾。结果显示,当Fe（Ⅱ）-FPH在饲料中的添加量在1500—2500mg/kg时,凡纳滨对虾的成活率、增重率、特定生长率显著提高（P〈0.05）;当Fe（Ⅱ）-FPH在饲料中的添加量为2000—2500mg/kg时,对虾血清碱性磷酸酶（AKP）、溶菌酶（LZM）的活性均维持在一个较高的水平,且显著高于对照组（P〈0.05）;高浓度（≥2000mg/kg）、较长时间（56d）的Fe（Ⅱ）-FPH饲喂,对虾肌肉组织弹性增强,硬度加大,水产品品质增强。结果表明,饲料中添加适量的Fe（Ⅱ）-FPH对凡纳滨对虾生长有一定的促进作用,Fe（Ⅱ）-FPH可以提高对虾的免疫相关指标,并能提高水产品品质。

英文摘要：

A 56-d experiment was conducted to study the impact of dietary addition of Fe（II）-FPH （hairtail protein ferrous chelating peptide） on shrimp （Litopenaeus vannamei） growth performance, nonspecific immunity, and quality characteristics. Fe（II）-FPH was added into feed in amounts of 0, 500, 1000, 1500, 2000, 2500mg/kg. The results showed that at dosage 1500-2500mg/kg, Fe（II）-FPH could significantly increase shrimp survival rate, weight gain, and specific growth rate （P〈0.05）; at dosage 2000-2500mg/kg, the serum alkaline phosphatase AKP, LZM lysozyme activity were significantly enhanced （P〈0.05）; and at a high concentration （≥ 2000mg/kg） for a longer time （56d）, the shrimp muscle tissue elasticity, hardness, and sensible quality of the aquatic products were improved. Therefore, an appropriate amount of dietary Fe（Ⅱ）-FPH addition would have positive impacts on L. vannamei farming and its seafood quality.