Li Xiaoli, Wu Xingbing, Li Xuemei, Wei Nian, Jiang Ming, Zhu Yongjiu, Zhu Tingbing
Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture and Rural Affairs, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China.
Biology (Basel). 2024 Sep 23;13(9):749. doi: 10.3390/biology13090749.
One of the crucial factors influencing the growth and viability of larvae and juveniles is their opening diets. The objective of this study was to identify suitable initial feed options for larvae and juveniles. A total of 1200 newly hatched with an average weight of 18.3 mg and an average length of 11.58 mm were selected and randomly divided into four groups. The fish were fed with different opening diets, including rotifer, , Tubifex, and micro-diet from six days after hatching (dahs), respectively. Growth indices and activities of digestive enzymes were assessed at 10, 15, 20, 25, 30, 35, and 40 dahs. Histological examination of the structure of the digestive tract was performed at 40 dahs, while survival rates were also documented. The results demonstrated that different diets had no effect on the survival rate of larvae and juveniles of . The growth performance indices were ranked as follows: Tubifex group > group > micro-diet group > rotifer group. Remarkably, the Tubifex group exhibited superior growth performance, which was also reflected in the structure of the digestive tract and digestive enzyme activity. Therefore, it is recommended to include Tubifex in the diet of larvae and juvenile during the standardized farming process.
影响幼体和幼鱼生长及生存能力的关键因素之一是它们的开口饲料。本研究的目的是确定适合幼体和幼鱼的初始饲料选择。总共挑选了1200尾刚孵化的幼体，平均体重为18.3毫克，平均体长为11.58毫米，并随机分为四组。从孵化后6天（dahs）开始，分别用不同的开口饲料喂养这些鱼，包括轮虫、 、颤蚓和微型饲料。在孵化后10、15、20、25、30、35和40天评估生长指标和消化酶活性。在孵化后40天对消化道结构进行组织学检查，同时记录存活率。结果表明，不同饲料对 幼体和幼鱼的存活率没有影响。生长性能指标排名如下：颤蚓组＞ 组＞微型饲料组＞轮虫组。值得注意的是，颤蚓组表现出卓越的生长性能，这也体现在消化道结构和消化酶活性上。因此，建议在标准化养殖过程中，在 幼体和幼鱼的饲料中添加颤蚓。
