Observations on Spiracular Behavior in AEDES Mosquitoes
FORT DETRICK FREDERICK MD
Pagination or Media Count:
An apparatus was constructed to allow simultaneous observation of the thoracic spiracles of mosquitoes and to permit recording of the behavior observed. A microenvironment of controlled composition and relative humidity was provided. In Aedes aegypti and triseriatus at rest in air the thoracic spiracles constantly open and close synchronously, although the degree of opening is minimal. Stationary flight, carbon dioxide, or hypoxia cause much more extensive synchronized opening. It was suggested that the thoracic compressions and extensions of the head noted in flight or hypoxia are possible ventilatory mechanisms. These were unrelated to the frequency of spiracular opening and closing. Decapitation eliminated spontaneous locomotor activity and this resulted in more conservative spiracular behavior.
- Anatomy and Physiology