In vitro studies on the environmental biology of Goiodes colchici (Denny) (Mallophaga : Ischnocera) I. The effects of temperature and humidity on the bionomics of G. colchici

Abstract

Pheasant body lice, G. colchici, were exposed to various conditions of temperature and humidity, and the consequent variations in adult longevity, egg production, fecundity, and egg resorption recorded. Temperatures in the 30-40C range were found to be essential for normal existence. Above this, animals died within 48 hr. Below this, irrespective of humidity, chill-coma supervened, survival was curtailed, and no eggs were laid. At 30°C, survival was maximal, but few eggs were laid. Due to a high level of fecundity, egg production was maximal at 35C at a high humidity, and survival equalled that at 30C. Levels of fecundity, egg-laying, and survival dropped as the humidity fell, and also as the temperature increased or decreased about 35C. It is evident that survival, fecundity, egg production, and egg-laying are closely geared to temperature and humidity.