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The effect of wind speed on the flight responses of tsetse flies to CO2: a wind-tunnel study
Authors:QUENTIN PAYNTER   JOHN BRADY
Affiliation:Department of Biology, Imperial College of Science Technology and Medicine, London
Abstract:Abstract. Female Glossina morsitans morsitans Westwood were video-recorded in a wind-tunnel as they entered, in cross-wind flight, a broad plume of CO2 (a component of host odour). At a wind speed that corresponds with peak catches in the field (c. 0.6 ms-1) odour produced both significant upwind turning responses (in-flight anemotaxis) and kinetic responses (reduced flight speed and increased sinuosity (m-1). At a wind speed of c. 0.2 ms-1 flies displayed anemotactic, but not kinetic, responses to odour. At very low wind speeds (0.1ms-1) neither upwind turning responses nor kinetic responses to odour were detected. The results are discussed with regard to current theory of host-location by tsetse.
Keywords:Glossina    tsetse fly    anemotaxis    klinokinesis    edge detection    chemotaxis    flight    orientation    host-finding    odour plume behaviour
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