ACTIVITY OF TWO SPECIES OF CALLIPHORA (DIPTERA) DURING BAROMETRIC PRESSURE CHANGES OF NATURAL MAGNITUDE

Publisher Website
Google Scholar
Abstract
The amount of flight activity of Calliphora vicina R.D. was monitored during (a) natural, diurnal, barometric pressure changes, and (b) experimental pressure changes of natural amounts and rates. Activity was increased by a change in trend from rising or level to falling pressure, or by two step-like drops of 1 millibar, each lasting 15 minutes, separated by 1 hour of level pressure. The change to falling pressure, not falling pressure per se. stimulated activity in C. vicina. Activity was little, if at all, affected by a change to rising pressure from a previous condition of falling or level pressure. With Calliphora vomitoria (L.) no effects of a changing pressure trend on activity were observed. These findings indicate that natural, and particularly prefrontal, pressure drops under certain conditions can influence the amount of activity of some insect species.

This publication has 4 references indexed in Scilit: