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The effect of site and sampling method on the size and composition of catches of tsetse flies (Glossina) and Tabanidae (Diptera)

Published online by Cambridge University Press:  10 July 2009

D. S. Saunders
D. S. Saunders
Affiliation:
Sub-department of Parasitology, Department of Zoology, University of Edinburgh
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Extract

Two experiments on factors affecting the size and composition of catches of tsetse flies, principally Glossina pallidipes Aust., were carried out in 1963 in South Busoga, Uganda. Eight attractants were distributed between eight sites on eight successive days in a Latin square design for each experiment. The attractants comprised two black Zebu oxen and Morris traps covered with ordinary hessian (brown traps) or with hessian dyed black (black traps). Three of the sites were on the edge of a large thicket, two were close to isolated clumps of thicket in the midst of grassland and three were in the open grassland itself. Catching took place for 12 hours each day. The total numbers and sex ratio were recorded for each catch, and also, from dissections, the age composition and pregnancy states of the female portion of the catch. Examples of G. brevipalpis Newst., G. palpalis fuscipes Newst. and of 13 species of Tabanidae were also caught, but in smaller numbers, and were recorded in less detail.

Catches of G. pallidipes at sites close to the thicket edge were considerably greater than at sites away from the thicket, but, apart from an increased proportion of nulliparous females at the clump and grass sites, the composition of the female sample was unaffected by the type of site. The bait-oxen caught larger samples than the traps, but a smaller proportion of females, and these contained a higher proportion of young flies and of flies carrying an egg in the uterus. In comparison with brown traps, black traps caught smaller numbers of G. pallidipes, and a smaller portion of females, but a larger proportion of these were nulliparous. Although the two oxen had been selected for similarity of size and colour, they differed in the samples they attracted: one of them consistently attracted a larger sample of all the common species and, in the second experiment, a larger proportion of females in the samples of G. pallidipes. Most examples of G. palpalis fuscipes were caught at the three edge sites, and all but one example of G. brevipalpis were caught on the bait-oxen.

All examples of the 13 species of Tabanidae caught on the oxen or in the traps were females. Apart from Tabanus par Wlk. they were poorly represented in the trap-catches, and there was no obvious effect of site upon the size of the samples.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 55 , Issue 3 , December 1964 , pp. 483 - 497
Copyright
Copyright © Cambridge University Press 1964

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References

Barrass, R. (1960 a). The settling of tsetse flies Glossina morsitans Westwood (Diptera, Muscidae) on cloth screens.—Ent. exp. appl. 3 pp. 59–67.CrossRefGoogle Scholar
Barrass, R. (1960 b). The settling of female Haematopota insidiatrix Austen (Diptera, Tabanidae) on cloth screens.—Ent. exp. appl. 3 pp. 257–266.CrossRefGoogle Scholar
Bursell, E. (1961). The behaviour of tsetse flies (Glossina swynnertoni Austen) in relation to problems of sampling.—Proc. R. ent. Soc. Lond. (A) 36 pp. 9–20.Google Scholar
Buxton, P. A. (1955). The natural history of tsetse flies.—Mem. Lond. Sch. Hyg. trop. Med. no. 10,816 pp. London, H. K. Lewis.Google Scholar
Glasgow, J. P. (1961 a). The variability of fly-round catches in field studies of Glossina.—Bull. ent. Res. 51 pp. 781–788.CrossRefGoogle Scholar
Glasgow, J. P. (1961 b). Seasonal variation in size and colour, and daily changes in the distribution of Glossina pallidipes Aust. in the South Busoga Forest, Uganda.—Bull. ent. Res. 52 pp. 647–666.CrossRefGoogle Scholar
Glasgow, J. P. & Duffy, B. J. (1961. Traps in field studies of Glossina pallidipes Austen.—Bull. ent. Res. 52 pp. 795–814.CrossRefGoogle Scholar
Harley, J. M. B. (1963 a). The attack of G. pallidipes and Stomoxys on cattle of different colours.—Rep. E. Afr. Tryp. Res. Org. 1961 pp. 34–35.Google Scholar
Harley, J. M. B.(1963 b). New trends in entomological research in trypanosomiasis.—Bull. World Hlth Org. 28 pp. 825–830.Google ScholarPubMed
Harris, R. H. T. P. (1932. Some facts and figures regarding the attempted control of Glossina pallidipes in Zululand.—S. Afr. J. Sci. 29 pp. 495–507.Google Scholar
Jack, R. W. (1939). Studies in the physiology and behaviour of Glossina morsitans, Westw.—Mem. Dep. Agric. S. Rhod. no. 1,203 pp.Google Scholar
Jack, R. W. (1941). Notes on the behaviour of Glossina pallidipes and G. brevipalpis, and some comparisons with G. morsitans.—Bull. ent. Res. 31 pp. 407–430.CrossRefGoogle Scholar
Lloyd, H. M. (1935). Notes on the bionomics of Glossina swynnertoni Austen.—Bull. ent. Res. 26 pp. 439–468.CrossRefGoogle Scholar
Maldonado, B. (1910). Methods of destroying tsetse flies.—Bull. Sleep. Sickn. Bur. 2 p. 26. (Original not seen.)Google Scholar
Moggridge, J. Y. (1936). Experiments on the crossing of open spaces by Glossina swynnertoni.—Bull. ent. Res. 27 pp. 435–448.CrossRefGoogle Scholar
Morris, K. R. S. (1960). Trapping as a means of studying the game tsetse, Glossina pallidipes Aust.—Bull. ent. Res. 51 pp. 533–557.CrossRefGoogle Scholar
Morris, K. R. S. & Morris, M. G. (1949). The use of traps against tsetse in West Africa.—Bull. ent. Res. 39 pp. 491–528.CrossRefGoogle ScholarPubMed
Nash, T. A. M. (1930). A contribution to our knowledge of the bionomics of Glossina morsitans.—Bull. ent. Res. 21 pp. 201–256.CrossRefGoogle Scholar
Potts, W. H. (1930). A contribution to the study of numbers of tsetse fly (Glossina morsitans Westw.) by quantitative methods.—S. Afr. J. Sci. 27 pp. 491–497.Google Scholar
Saunders, D. S. (1962). Age determination for female tsetse flies and the age compositions of samples of Glossina pallidipes Aust., G. palpalis fuscipes Newst. and G. brevipalpis Newst.—Bull. ent. Res. 53 pp. 579–595.CrossRefGoogle Scholar
Smith, I. M. & Rennison, B. D. (1961). Studies of the sampling of Glossina pallidipes Aust. I.—The numbers caught daily on cattle, in Morris traps and on a fly-round.—Bull. ent. Res. 52 pp. 165–182.CrossRefGoogle Scholar
Swynnerton, C. F. M. (1933). Some traps for tsetse flies.—Bull. ent. Res. 24 pp. 69–102.CrossRefGoogle Scholar
Vanderplank, F. L. (1944). Studies on the behaviour of the tsetse fly (Glossina pallidipes) in the field.—J. Anim. Ecol. 13 pp. 39–48.CrossRefGoogle Scholar