摘要在温度可人为控制在（19±1）℃的室内，于内壁光滑的面积为193 cm ×167 cm的水泥池中，按照每个池内80尾的密度人工饲养幼体大鲵。测量大鲵试验始末体长体质量，通过生长指标，组织营养成分及消化酶活性对比分析，探究大鲵幼体的适宜投喂频率。结果表明：饥饿处理使大鲵摄食率增加，消化酶活性增强。投喂频率为饥饿6d再连续投喂6d，特定生长率和质量增加率出现最大值，显著高于其他组（P＜0．05），且饵料系数最低。投喂频率为饥饿2d再连续投喂2d，蛋白含量高且脂肪含量低。投喂频率为饥饿6d再连续投喂6d、饥饿8d再连续投喂8d，存活率略低于其他组。若对存活率和组织营养成分要求比较高则饥饿2d再连续投喂2d为适宜投喂频率，如果对此没有严格要求则饥饿6d再连续投喂6d为大鲵幼体适宜投喂频率，采用该频率投喂可使存活率、生长性能和营养成分都能达到较高水平。
Abstract：Chinese giant salamander (Andrias davidianus) juveniles (18 months old) were reared in 193 cm × 167 cm cement tanks at a rate of 80 individuals per tank and fed in various feeding regimes at water tem‐perature of 19 ± 1 ℃ to evaluate the suitable feeding frequency via grow th performance ,body composition and digestive enzyme activity in an intensive aquaculture .The results showed that there were elevated food intake and digestive enzyme activity in the fasted salamander .The maximal weight gain rate (WGR) and specific growth rate (SGR) and minimal food conversion ratio (FCR) were observed in the salamander fed and fasted alternatively in a 6 day interval ,significantly higher or lower than those in the other groups(P<0.05) .The salamander fed and fasted alternatively in a 2 day interval(S2F2) had high protein content and low fat content ,and there was lower survival rate in the salamander fed and fasted alternatively in a 6 or 8 day interval (S6F6 and S8F8) than that in other groups .When very high survival rate and body nutri‐ents were hoped ,the suitable feeding frequency was of feeding and fasting alternatively in a 2 day interval . If not ,suitable feeding frequency was of feeding and fasting alternatively in a 6 day interval ,which the ju‐venile salamander had relatively high survival rate ,grow th performance and body nutrients .
收稿日期: 2015-10-25
引用本文:
杨振江,肖汉兵,田海峰,孟彦,胡乔木,王芳. 大鲵幼鲵适宜投喂频率的研究[J]. 水产科学, 2015, (10): 629-633.
YANG Zhenjiang,XIAO Hanbing,TIAN Haifeng,MENG Yan,HU Qiaomu,WANG Fang. Suitable Feeding Frequency of Juvenile Chinese Giant Salamander. Fisheries Science, 2015, (10): 629-633.
