Titre
Orientation of tsetse-flies to wind, within and outside host odor plumes in the field
Type
article
Institution
Externe
Périodique
Auteur(s)
Gibson, G.
Auteure/Auteur
Packer, M.J.
Auteure/Auteur
Steullet, P.
Auteure/Auteur
Brady, J.
Auteure/Auteur
Liens vers les personnes
ISSN
0307-6962
Statut éditorial
Publié
Date de publication
1991
Volume
16
Numéro
1
Première page
47
Dernière page/numéro d’article
56
Peer-reviewed
Oui
Langue
anglais
Résumé
Free-flying wild tsetse flies (Glossina pallidipes Aust. and G.m. morsitans Westw.) were video recorded in Zimbabwe as they flew within an artificial host odour plume at 3, 7 or 15 m from the source, or in no odour, with and without a 0.75 m2 vertical, black visual target present aligned with the wind. With no visual target present, flights in odour were strongly biased upwind, and in the absence of odour strongly biased downwind. With the target present, between 16% and 40% of the upwind approaching flies responded visually as they passed the target, by circling it, in proportion to the proximity of the source (taken to be proportional to the mean odour concentration). Crosswind approaching flies (for whom the target will have been visible for some metres away) circled more frequently (34-56%), but without obvious correlation with the odour concentration. Circling flies also responded orthokinetically, by slowing down as they passed the target. The departure directions relative to the wind of flies leaving the target were significantly affected by the odour concentration. At 3 m they left the target in all directions, except possibly avoiding due upwind. At 7 m they left with an obliquely upwind bias, but at 15 m and also in no odour, they left with a strong crosswind bias.
PID Serval
serval:BIB_BB48852A4F85
Date de création
2017-05-09T09:28:34.688Z
Date de création dans IRIS
2025-05-21T04:27:59Z