引种菲牛蛭摄食与生长的研究

2014年,将广西的菲牛蛭(Hirudinaria manillensis)引种入贵州开展驯养试验,对菲牛蛭的摄食与生长进行了研究。结果显示:(1)引种菲牛蛭摄食系数随着体重的增加而降低,其中在体重小于1 g时摄食系数最大,为0.89±0.60,体重在1~4 g时为0.54±0.45,体重在4~10 g、11~17 g的摄食系数分别为0.37±0.26、0.24±0.18。(2)引种菲牛蛭平均快速代谢期随着体重的增加而延长,体重小于1 g时平均快速代谢期最短,为(3.30±0.82)d,体重在1~17 g之间时快速代谢期相近,约为6~7 d。(3)引种菲牛蛭增重率随体重的增加呈现下降趋势,其中体重小于1 g时增重率最大,可达626.67%,1~4 g时增重率下降最快,增重率为263.96%,11~17 g增重率最小,仅有64.01%。(4)体重在小于1 g、1~4 g、4~10 g、大于10 g几个阶段的饲料系数分别为209.57%、225.59%、237.12%和294.65%。研究表明,随着体重的增加引种菲牛蛭饲料系数有增加的趋势;引种菲牛蛭摄食系数在体重小于1 g、1~4 g、4~10 g、大于10 g等几个生长阶段有明显差异,投喂周期存在差异,可以以此作为菲牛蛭分级饲养的依据。

Studies on the feeding and growth of introduced Hirudinaria manillensis

The Hirudinaria manillensis were introduced from Guangxi province into Guizhou province in 2014, the feeding and growth of H. manillensis in Guizhou was studied. The results showed that: 1) The feading coefficient of H. manillensis decreased gradually with the increase of the weight, and the feading coefficient was 0. 89 ± 0. 60, 0. 54 ± 0. 45, 0. 37 ± 0. 26 and 0. 24 ± 0. 18. 2, respectively when the weight was 1 g, 1~4 g, 4~10 g, 11~17 g, respectively. 2) The period of averaging rapid metabolic of H. manillensis were gradually extension with the increasing of the weight, and the pe-riod of averaging rapid metabolic was 3. 30 ± 0. 82 when their weight were 1g, while the period of averaging rapid metabolic was 6~7 days, when their weight were 1~17 g. 3)The growth rate of H. manillensis were decreased with the increasing of the weight, and the growth rate reach 626. 67% was highest when their weight less than 1 g. The decrease of growth rate was the fasted when their weight were 1 ~4 g, which was 263. 96%, and when their weight were 11 ~17 g was least, which was 64. 01%. 4 ) The feed coefficient were 209. 57%, 225. 59%, 237. 12%, and 294. 65%, respectively in group of weight less than 1 g, 1~4 g, 4~10 g, more than 10 g, respectively. The research indicated that the feed coef-ficient of H. manillensis has a increasing trend with the weight increase. The taking coefficient has significant differences in the stage of less than 1 g, 1~4 g, 4~10 g, and more than 10 g, the the feeding periods of Hirudinaria manillensis also has differences, and we could grading feeding H. manillensis according to it.