摘要
为了解不同底质环境对达氏鲟(Acipenser dabryanus)幼鱼生长效果的影响,试验选取初始平均体质量(2. 46±0. 07) g的试验鱼1 200尾,随机分成4个处理组,分别于砂子、卵石A、卵石B、砂子+卵石(综合组)四种类型底质下饲养12周。结果表明:砂子组试验鱼体增重率最高达1 274. 64%,卵石B组试验鱼体增重率最低为915. 7%,卵石A组、卵石B组、砂子组与综合组之间差异显著。砂子组成活率最高达92. 33%,卵石A组次之,综合组试验鱼成活率最低为56%。试验鱼体长和全长呈现了相同的趋势,卵石A组、卵石B组、砂子组与综合组之间差异显著。底质对试验鱼全鱼和肌肉粗蛋白质与粗脂肪含量有显著影响;以增重率和成活率判定,适宜达氏鲟幼鱼生长的底质环境依次为砂子组、卵石组和综合组。
The average weight of(2.46±0.07)g and total number of 1 200 tail juvenile Acipenser dabryanus were chosen in this experiment to determine the effects of different substrate environment on growth performance.Juvenile Acipenser dabryanus were randomly divided into four treatments,reared in sand substrate,pebble substrate A,pebble substrate B and mixed substrates(sand and pebble)for 12 weeks.The results showed that highest weight gain rate was 1 274.64%of sand substrate,lowest weight gain rate was 915.7%of pebble substrate.There was significant difference observed between pebble substrate A,pebble substrate B,sand substrate and mixed substrates.The survival rate of fish was the highest(92.33%)in the sand group.The survival rate of fish in the pebble substrate B was the second high.Fish survival rate was the lowest in mixed substrates(56%).The maximum body length and total length of the fish in different groups had the same tendency.Significant differences were observed among pebble substrate A,pebble substrate B,sand substrate and mixed substrates.Crude protein,lipid content in body and muscle were significant effected by the substrate.The suitable substrate for juvenile Acipenser dabryanus was the sand substrate,pebble substrate and mixed substrates based on the weight gain rate and the survival rate.
作者
吴金平
杜浩
褚志鹏
乔新美
熊伟
罗江
危起伟
WU Jin-ping;DU Hao;CHU Zhi-peng;QIAO Xin-mei;XIONG Wei;LUO Jiang;WEI Qi-wei(Key Laboratory of Freshwater Biodiversity Conservation of Ministry of Agriculture;Yangtze River Fisheries Research Institute,Chinese Academy of Fishery Science,Wuhan 430223,China)
出处
《淡水渔业》
CSCD
北大核心
2018年第6期23-26,共4页
Freshwater Fisheries
基金
国家自然科学基金面上项目(31772854)
中央公益性基本科研业务费项目(2017HY-ZD0405)。
