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Community Structure and Diel Activity Patterns of Stomoxyinae from Odour-baited Nzi Trap Collections

Published online by Cambridge University Press:  19 September 2011

Paul N. Ndegwa  and
Jennifer A. Ogodo
Paul N. Ndegwa
Affiliation:
Department of Zoology, University of Nairobi, P. O. Box 30197, Nairobi, Kenya
Jennifer A. Ogodo
Affiliation:
Department of Zoology, University of Nairobi, P. O. Box 30197, Nairobi, Kenya
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Abstract

—The community structure and diel activity patterns of peridomestic Stomoxyinae at two locations in Nairobi and its outskirts (Chiromo and Ruiru) were studied using Nzi traps baited with octenol. Six species of Stomoxys (S. calcitrans, S. niger niger, S. n. bilineatus, S. inomatus, S. taeniatus, S. varipes) and three other Stomoxyinae genera (Haematobosca, Stygeromyia, Parastomoxys) were caught. At Chiromo, species diversity (H') varied from 0.29 to 0.65 and evenness from 0.59 to 0.83, whereas at Ruiru, diversity varied from 0.0 to 0.38 and evenness from 0.0 to 0.46. Diurnal activity both S. calcitrans and S. n. niger was bimodal, with a small peak of activity in the morning (0800–1100 hrs) and a major peak in the evening (1700–1800 hrs). Both species showed a midday depression in activity. The activity of S. inomatus rose steadily throughout the day with only a slight midday depression. These results are discussed with respect to results of similar studies in a natural, undisturbed habitat.

Résumé

—La structure des communautés et les rythmes d'activité diurnes des Stomoxyinae péridomestiques de deux localités de Nairobi et de ses environs (Chiromo et Ruiru) ont été étudiés à l'aide de pièges de Nzi appàtés avec de l'octénol. Six espèces de Stomoxys (S. calcitrans, S. niger niger, S. n. bilineatus, S. inomatus, S. taeniatus, S. varipes) et trois autres genres de Stomoxyinae (Haematobosca, Stygeromyia, Parastomoxys) ont été attrappées. A Chiromo, l'indice de diversité des espèces (H') varie de 0,29 à 0,65 et celui d'équivalence entre 0,59 et 0,83, alors qu'à Ruiru, l'indice de diversité est compris entre 0,0 et 0,38 et celui d'équivalence entre 0,0 et 0,46. L'activité diurne de S. calcitrans et S. n. niger est bimodale avec un petit pic d'activité le matin (0800–1000 hrs) et un pic majeur dans la soiree (1700–1800 hrs). Les deux espèces sont peu actives en milieu de journée. L'activité de S. inomatus augmente régulièrement pendant la journée avec une baisse légère en milieu de journée. Ces résultats sont discutés en regard de résultats similaires obtenus dans un habitat naturel, non perturbé.

Keywords

peridomestic stable fliesStomoxyscommunity structurediversitydiel activityKenyamouches d'écurie péridomestiquesStomoxysstructure des communautésdiversitéactivité diurneKenya
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 22 , Issue 4 , December 2002 , pp. 275 - 280
Copyright
Copyright © ICIPE 2002

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