Survival of Drosophila melanogaster Pupa Exposed to Ultrasound

Abstract

Drosophila melanogaster pupa were exposed to 1-MHz continuous wave ultrasound. Exposure ranged from 0.2 to $4.0 {\rm W}/{\rm cm}^{2}$ (spatially average acoustic intensities) for 10-min continuous exposure. The ${\rm LD}_{50/7}$ was calculated to be $0.7 {\rm W}/{\rm cm}^{2}$. All pupa receiving an exposure greater than $1.5 {\rm W}/{\rm cm}^{2}$ failed to emerge into adults, but a number of these continued to develop to a point 78 hr postexposure. These pupae displayed abnormal eye pigmentation and abnormal eye and thorax development.