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Distribution and seasonal variation of tsetse population in the egbe area of kwara state, Nigeria

Published online by Cambridge University Press:  19 September 2011

G.A. Omoogun ,
O.O. Dipeolu  and
O.A. Akinboade
G.A. Omoogun
Affiliation:
Nigerian Institute for Trypanosomiasis Research, P.M.B. 2077, Kaduna, Nigeria
O.O. Dipeolu
Affiliation:
Department of Veterinary Microbiology and Parasitology, University of Ibadan, Ibadan, Nigeria
O.A. Akinboade
Affiliation:
Department of Veterinary Microbiology and Parasitology, University of Ibadan, Ibadan, Nigeria
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Abstract

Observation on the distribution and seasonal variation of riverine tsetse population at Egbe in the Derived Savanna Zone of Nigeria was made and compared with variation in other vegetation types of the country. Egbe, in a sub-humid location, was observed to have a low rainy/high dry season population density similar to what occurs in part of the Southern Guinea Savanna Zone. To the north of these areas, the less humid vegetation zones show a definite reverse pattern (high rainy/low dry season) of seasonal population density. The Rain Forest Belt, a humid zone has, surprisingly, more similarity with the less humid zones to its far north than with the sub-humid zones nearer to it Irrespective of zone and season, a favourable temperature of between 26.1 and 26.7°C appeared important towards having a high population density. Reasons were given for the low rainy season tsetse density at Egbe. Unlike zones in the less humid north where rainy season dispersal is well marked, tsetse distribution in the Derived Savanna Zone remained by the riverine vegetation almost throughout the year. The advantage of this study to a proposed ranch for the area was highlighted.

Résumé

Des observations ont été faites sur la distribution et la variation saisonnière de la population de mouches tsétsé riveraines a Egbè dans la zôone derivante de la savane au Nigéria et ont été comparées aux variations dans d'autre types de végétation du pays. Egbè située dans une region peu humide, fut observee comme ayant une densité de population de mouches plutôt basse pendant la saison pluvieuse et elevee pendant la saison sèche, densité semblable a ce qui est obtenue dans la savane au sud de la Guinée. Au nord de ces regions, les zônes de végétation les moins humides montrent une distribution nettement inverse (a savoir, densité elevée pendant la saison pluvieuse et basse pendant la saison sèche). La ceinture de forêt pluvieuse, une zone humide, a de façon surprenante, plus de resemblance avec les zônes eloignées moins humides du nord qu'avec les zones peu humides proches. Sans tenir compte de la zône et de la saison, une température idéale située entre 26.1 et 26.7°C parait nécessaire pour une densité élevée. Des raisons furent avancees pour la basse densité de mouches tsétsé a Egbè pendant la saison pluvieuse. Contrairement aux zônes moins humides situées vers le nord où la dispersion des pluies est tres marquée, la distribution des mouches dans la zône derivante de la savane, demeure pratiquement pendant toute l'année dans les regions riveraines boisées. L'importance de ces études pour l'établissement d'un elevage de bétaii dans la région a été soulignée.

Keywords

Glossina spp.comparisonsampling methodsDerived Savanna
Type
Articles
Information
International Journal of Tropical Insect Science , Volume 10 , Issue 5 , October 1989 , pp. 713 - 718
Copyright
Copyright © ICIPE 1989

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References

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