【摘要】 设计制作一种新型体表标签，标记了770尾18月龄大黄鱼，在室内进行28 d以植物蛋白源为主的无鱼粉配合饲料饲养实验，借助视频记录观察摄食情况，获得了210尾大黄鱼的完整摄食量和饲料效率测定数据。结果显示，大黄鱼个体间的摄食情况和饲料效率都差异巨大。实验期间有的个体摄食活跃，最高摄食饲料量达到409颗(颗粒均重0.2627 g),增重显著，增重率达43.77%;有的个体则很少摄食、甚至完全没有摄食，体重出现负生长，减重最多的达30.3%;有的个体在初始体重、摄食量均相近的情况下，饲料效率、增重率以及特定生长率却存在极显著差异(P<0.01),在体重正增长的个体中，饲料效率最高的达0.827(饲料系数1.21),最低的只有0.008(饲料系数128.73)。这些结果提示大黄鱼对无鱼粉饲料的适应性与饲料效率都有很大的遗传改良潜力。更多还原

【Abstract】 In this study, a new type of surface labels was designed and used to mark 770 large yellow croakers at the age of 18 months for keeping track of feed intake. A 28-day indoor feeding experiment was conducted using a plant protein source based fishmeal free formula feed. The feeding behavior was observed and recorded using video, while complete feed intake(FI) and feed efficiency(FE) data were obtained for 210 large yellow croakers. The results showed that there were huge differences in FI and FE among individuals of large yellow croakers. During the experiment, some individuals were active in feeding, with the highest FI reaching 409 pellets(each pellet weighing 0.2627 g); and these individuals showed significant weight gain, with the highest weight gain rate of 43.77%. On the other hand, some individuals rarely or even did not feed at all, resulting in negative growth with a maximum weight loss of 30.3%. Even among individuals with similar initial body weight and FI, there were extremely significant differences in FE, weight gain rate(WGR), and specific growth rate(SGR)(P<0.01). Among the individuals with positive weight gain, the highest FE was 0.827(feed conversion ratio(FCR) of 1.21), while the lowest was only 0.008(FCR of 128.73). It is suggested that large yellow croaker has great potential for genetic improvement in both adaptation to fishmeal-free feeds and feed efficiency.更多还原