Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-18T19:09:58.976Z Has data issue: false hasContentIssue false
  • English
  • Français

The range of attraction of the biconical trap for Glossina pallidipes and Glossina brevipalpis

Published online by Cambridge University Press:  19 September 2011

R. D. Dransfield
R. D. Dransfield
Affiliation:
International Centre of Insect Physiology and Ecology, P.O. Box 30772, Nairobi, Kenya
Get access

Abstract

Although biconical traps are now widely used for the sampling of tsetse populations, they provide only relative population estimates determined by the fly density, activity and trap response. Studies were therefore undertaken to convert such biconical trap indices into unbiased absolute population density estimates. The first step was to determine the range of attraction of such traps for the main trypanosome vector in Kenya, Glossina pallidipes, although some data were also obtained for G. brevipalpis. Two different techniques were used. Firstly traps were placed at varying distances apart, resulting in competition and consequent reduction of catch sizes per trap when ranges of attraction overlapped. Secondly, the catches in grassland at varying distances from a forest edge were compared with two predicted functions relating catch size to distance. Results from the competition experiments showed a marked decline in catch per trap when the intertrap distance was less than 30–40 m. The resultant estimate of maximum range of attraction of 15–20 m for G. pallidipes was compatible with the observed pattern of decline of catches at increasing distances from the forest edge. The range for G. brevipalpis was tentatively estimated as up to 10–15 m.

Keywords

Glossinarange of attractionbiconical trap
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 5 , Special Issue 5: Tsetse Behaviour and Population Ecology , October 1984 , pp. 363 - 368
Copyright
Copyright © ICIPE 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Challier, A., Eyraud, M., Lafaye, A. and Laveissière, C. (1977) Amélioration du rendement du piège biconique pour glossines (Diptera, Glossinidae) par l'emploi d'un cône inférieur bleu. Cah. ORSTOM Sér. Ent. méd. Parasit. 11, 251–262.Google Scholar
Dransfield, R. D., Brightwell, R., Onah, J. and Okolo, C. J. (1982) Population dynamics of Glossina morsitans sub-morsitans Newstead and G. tachinoides Westwood (Diptera: Glossinidae) in sub-Sudan savanna in northern Nigeria. I. Sampling methodology for adults and seasonal changes in numbers caught in different vegetation types. Bull. ent. Res. 72, 175–192.CrossRefGoogle Scholar
Gillies, M. T. and Wilkes, T. J. (1970) The range of attraction of single baits for some West African mosquitoes. Bull. ent. Res. 60, 225–235.CrossRefGoogle ScholarPubMed
Gillies, M. T. and Wilkes, T. J. (1972) The range of attraction of animal baits and carbon dioxide for mosquitoes studied in a freshwater area of West Africa. Bull. ent. Res. 61, 389–404.CrossRefGoogle Scholar
Glasgow, J. P. and Duffy, B. J. (1961) Traps in field studies of Glossina pallidipes Austen. Bull. ent. Res. 52, 795–814.CrossRefGoogle Scholar
Hargrove, J. W. (1980) Improved estimates of the efficiency of traps for Glossina morsitans morsitans Westwood and G. pallidipes Austen (Diptera: Glossinidae), with a note on the effect of the concentration of accompanying host odour on efficiency. Bull. ent. Res. 70, 579–587.CrossRefGoogle Scholar
Napier-Bax, S. N. (1937) The senses of smell and sight in Glossina swynnertoni. Bull. ent. Res. 28, 539–582.CrossRefGoogle Scholar
Perry, J. N., Wall, C. and Greenway, A. R. (1980) Latin square designs in field experiments involving sex attrac-tants. Ecol. Ent. 5, 385–396.CrossRefGoogle Scholar
Pilson, R. D. and Pilson, B. M. (1967) Behaviour studies of Glossina morsitans Westw. in the field. Bull. ent. Res. 57, 227–257.CrossRefGoogle ScholarPubMed
Rogers, D. (1983) Trypanosomiasis ‘risk’ or ‘challenge’—A review with recommendations. In Livestock Productivity and Trypanotolerance—Network Training Manual (Edited by Murray, M., Trail, J. C. M., Turner, D. A. and Wissocq, Y.). International Livestock Centre for Africa, Addis Ababa.Google Scholar
Vale, G. A. (1977) The flight of tsetse flies (Diptera: Glossinidae) to and from a stationary ox. Bull. ent. Res. 67, 297–304.CrossRefGoogle Scholar
Winer, B. J. (1971) Statistical Principles in Experimental Design, 2nd edn.McGraw-Hill, Kogakusha.Google Scholar