摘要
在工厂化养殖条件下，研究了养殖密度对2—5龄大鲵（Andrias davidianus）摄食与生长的影响。结果表明：2龄大鲵适宜养殖密度为27尾／m^2，该组特定生长率显著高于9尾／m^2组、18尾／m^2组（P〈0．05），且饵料系数最低；当养殖密度为17尾／m^2时，3龄大鲵的增重率、特定生长率最大，饵料系数最低且与低密度5尾／m^2组差异显著（P〈0．05），确定3龄大鲵的适宜养殖密度为17尾／m^2；4龄大鲵特定生长率的最大值出现在养殖密度为10尾／m^2，显著高于16尾／m^2组（P〈0．05），且饵料系数最低，4龄大鲵的适宜养殖密度为10尾／m^2；5龄大鲵的适宜养殖密度为5尾／m^2，特定生长率与高密度组9尾／m^2差异显著（P〈0．05），饵料系数最低。大鲵适宜养殖密度与体重存在显著的负相关性，关系式为y=～0．0164x＋25．34（r^2=0．8399）。
The effects of stocking density on the growth and ingestion of 2 ~ 5 year old Andrias davidianus on the conditions of industrial aquaculture were studied. The results showed that ： The suitable stocking density of 2 year old A. davidianus is 27 tail/m^2 which special growth rate is significantly higher than the group of 9 taiL/m^2 and 18 tail/m^2 （ P 〈 0. 05 ） ; The weight gain rate and the special growth rate of 3 year old A. davidianus were the highest when the stocking density is 17 tail/ m^2. The feed conversion ratio of 17 tail/m： is significantly lower than 5 tail/m^2 （P 〈 0. 05）. The suitable stocking density of 3 year old giant salamander is 17 tail/m^2. The suitable stocking density of 4 year old A. davidianus is 10 tail/m^2. The special growth rate is the highest when the stocking density is 10 tail/m^2, and it is obviously higher than the group of 16 tail/m^2 （ P 〈 0. 05 ）. The suitable stocking density of 5 year old A. davidianus is 5 tail/m^2. The special growth rate is the highest and the feed conversion ratio is the lowest. There was significant negative linear correlation between the suitable stocking density and weight （y = -0. 016 4x ＋25.34, r2 =0. 839 9）.
出处
《淡水渔业》
CSCD
北大核心
2013年第6期73-77,共5页
Freshwater Fisheries
基金
农业公益性行业科研专项经费(201203086)
