超声波对江黄颡幼鱼生长的影响

The effect of ultrasonic wave on the growth of Pseudobagrus vachelli

通过观察超声波辐射对鱼类生长的影响,探索超声波在水产养殖中的应用。选用江黄颡幼鱼(平均体长8.76±0.42 cm)为实验对象,共设四个实验组和一个对照组。使用四种不同形式的超声波对其进行辐射刺激。经60 d超声辐射刺激后,各组间的体长、体重呈现极显著性差异(P<0.01)。其中,每天受频率23 KHz,声强400 mW/cm2的连续3 min超声波辐射的鱼体平均体重增长最快,比对照组平均体重多19%,体长多4%左右。实验期间,该组的体长、体重增长率分别为39.4%和187.2%。初步表明低功率超声波辐射对江黄颡幼鱼具有促进生长的作用。还同时开展了有关生理学方面的研究和观察。

This is an exploring experiment using ultrasonic wave in aquaculture to find out their effects on fishes. The experiment fish, Pseudobagrus vachelli, were selected with an average body length 8.76 ±0.42 cm. The experiment has been organized as 4 experimental groups and 1 control group, which were treated by a set of stimulation, i.e. 4 groups of ultrasonic pulses in varied pattern. The results show a significant difference （P 〈0.01） between groups after 60 days＇ ultrasonic wave radiation. The group A, treated by 23 KHz wave in 400 mW/cm^2 with 3 minutes radiation duration, has the fastest growth rate, 19% faster than the control group in weight. Their average body length is 4% longer than the control group too. The growth rates of the body length and weight of the group A are 39.4% and 187.2% respectively. This experiment preliminary shows that low intensity of the ultrasonic wave has a positive impact on the growth of Pseudobagrus vachelli. The biological study and observation has been carried out in all sampling phases.