Abstract:

In order to to study the effect of ultrasonic irradiation on growth and survival rates of veliger larvae of Coelomactra. Antiquata, experiments were carried out in static water systems. The results revealed that under the conditions of ultrasonic electric power 80w, frequency 20.4kHz. and ultrasonic exposure 30s, the day＇s growth rate of veliger larvae of C. antiquata reached 13.67%, which was 2.22% higher compared to the control （11.45%）. Repeated ultrasonic irradiation clearly affected the growth rate of veliger larvae of C antiquate. When ultrasonic irradiation was applied for the first time, the experimental group＇s growth rate was greater than the control, and when ultrasonic irradiation was 50s, the highest growth rate was 18.95% on the first day, compared to 10.23% of the control. Continued ultrasonic irradiation, however, minished the growth[著者文摘]