Skip to main content Accessibility help
×
Home

The height and direction of flight of mosquitoes in West African savanna, in relation to wind speed and direction

  • W. F. Snow (a1)

Abstract

The height and direction of mosquito flight related to wind speed and direction, in the absence of a host, was investigated in open savanna in The Gambia, West Africa. Non-directional suction traps (at heigts of 0·68, 2·13 and 3·15 m); directional flight traps facing four directions ar three levels (0·00–1·37 m, 1·45–2·82 m and 2·90–4·27 m) and directional suction traps facing two directions at three heights (0–1·2 m, 2·4–3·7 m nd 4·9–6·1 m) were used. Catches form the non-directional suction traps and pooled data from all flight traps at each level showed an inverse relationship between wind speed and the height of flight of Anopheles melas (Theo.), of gravid females and of male mosquitoes. There was no indication of a similar relationship for the Culex decens Theo. group or for C. thalassius Theo. The results from flight traps and directional suction traps showed that all mosquitoes were apparently flying upwind at all the levels investigaed. It is concluded that, although upwind flight probably does not occur naturally in the open at eights of more than 1 or 2 m, these experiments indicate that upwind flight could occur at higher levels, in the lee of tree and other obstacles.

Copyright

References

Hide All
Bailey, S. F.Eliason, D. A. & Hoffman, B. L. (1965). Flight and dispersal of the mosquito Culex tarsalis Coquillett in the Sacramento Valley of California. —Hilgardia 37, 73113.
Bonnet, D. D. & Worcester, D. J.. (1946). The dispersal of Aedes albopictus in the territory of Hawaii. —Am. J. trop. Med. 26, 465476.
Geiger, R. (1965). The climate near the ground. 4th edn.— 611 pp. Cambridge, Mass.Harvard University Press.
Gillies, M. T. (1969). The ramp-trap, an unbaited device for flight studies of mosquitoes..— Mosquito News 29, 189193.
Gillies, M. T. & Wilkes, T. J. (1972). The range of attraction of animal baits and carbondioxide for mosquitoes. Studies in a freshwater area of West Africa. —Bull. ent. Res. 61, 389404.
Gillies, M. T.. & Wilkes, T. J. (1974). Evidence for downwind flights by host-seeking mosquitoes.—Nature, Lond. 252 388389.
Haeger, J. S. (1960). Behavior preceding migration inthe salt-marsh mosquito, Aedes taeniorhynchus (Wiedemann).—Mosquito News 20, 136147.
Hocking, B. (1963). The use of attractants and repellents in vector control.—Bull. Wld Hlth Org. 29 suppl., 121126.
Kennedy, J. S. (1940). The visual responses of flying mosquitoes.—Proc. zool. Soc. Lond. (A) 109, 221242.
KENNEDY, J. S. (1951). The migration of the desert locust (Schistocerca gregaria Forsk.) I. The behaviour of swarms. II. A theory of long-range migrations.—Phil. Trans. R. Soc. (B) 235, 163290.
Klassen, W. & Hocking, B. (1964). The influence of a deep river valley system on the dispersal of Aedes mosquitoes.—Bull. ent. Res. 55 289304.
Lewis, T. & Siddorn, J. W. (1959). A Simple portable recorder for direction and speed of wind.—J. anim. Ecol. 28 377380.
Lewis, T. & Taylor, L. R. (1967). Introduction to experimental ecology..— xi+401 pp. London, Academic Press
Nielsen, E. T. (1958). The initial stage of migration in salt-marsh mosquitoes.—Bull. ent. Res. 49 305313.
Provost, M. W. (1952). The dispersal of Aedes taeniorhynchus. I. Preliminary studies.—Mosquito News 12, 174190.
Provost, M. W. (1960). The dispersal of Aedes taeniorhynchus. III. Study method for migratory exodus.—Mosquito News 20, 148161.
Snow, W. F. (1975). The vertical distribution of flying mosquitoes (Diptera, Culicidae) in West African savanna.—Bull. ent. Res. 65 269277.
Snow, W. F. (1976). The direction of flight of mosquitoes (Diptera, Culicidae) near the ground in West African savanna in relation to wind direction, in the presence and absence of bait.—Bull. ent. Res. 65,555562.
Snow, W. F. & Boreham, P. F. L. (1973). The feeding habits of some West African Culex (Dipt., Culicidae) mosquitoes.—Bull. ent. Res. 62, 517526.
Taylor, L. R. (1958). Aphid dispersal and diurnal periodicity.Proc. Linn. Soc. Lond. 169, 1673.
Taylor, L. R.. (1974). Insect migration, flight periodicity and the boundary layer. — J. anim. Ecol. 43, 225238.

The height and direction of flight of mosquitoes in West African savanna, in relation to wind speed and direction

  • W. F. Snow (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed