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The effect of wind speed on the flight responses of tsetse flies to CO 2 : a wind‐tunnel study
Author(s) -
PAYNTER QUENTIN,
BRADY JOHN
Publication year - 1996
Publication title -
physiological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 57
eISSN - 1365-3032
pISSN - 0307-6962
DOI - 10.1111/j.1365-3032.1996.tb00870.x
Subject(s) - wind speed , wind tunnel , crosswind , atmospheric sciences , sinuosity , meteorology , plume , biology , environmental science , physics , mechanics , geometry , mathematics
. Female Glossina morsitans morsitans Westwood were video‐recorded in a wind‐tunnel as they entered, in cross‐wind flight, a broad plume of CO 2 (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 (d̀m‐ 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.