7 research outputs found

    DonnĂ©es prĂ©liminaires sur la distribution spatio-temporelle des chauves-souris Ă  tĂȘte de marteau, Hypsignathus monstrosus H. Allen, 1861 dans la commune du Plateau (Abidjan, CĂŽte d’Ivoire)

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    La population de chauves-souris Ă  tĂȘte de marteau, Hypsignathus monstrosus H. Allen, 1861, de la commune du Plateau Ă  Abidjan a Ă©tĂ© Ă©tudiĂ©e d’aoĂ»t 2005 Ă  juillet 2006. Cette Ă©tude a Ă©tĂ© rĂ©alisĂ©e en procĂ©dant Ă  des reconnaissances de vocalisation, des observations directes et des comptages aux pieds d’arbres en vue d’identifier les sites de reproduction, de dĂ©terminer les effectifs et leurs variations. Les rĂ©sultats indiquent que les chauves-souris Ă  tĂȘte de marteau ont une prĂ©fĂ©rence marquĂ©e pour les sites de reproduction Ă  Terminalia catappa L. (Combretaceae). Un effectif moyen de 6 ± 2 chauves-souris Ă  tĂȘte de marteau a Ă©tĂ© dĂ©nombrĂ© au cours de l’étude. Les effectifs ont Ă©tĂ© stables d’aoĂ»t Ă  septembre avant de chuter d’octobre Ă  janvier puis d’augmenter de fĂ©vrier Ă  avril avant de baisser en mai et de s’annuler en juin et juillet. Les effectifs ont variĂ© avec l’espĂšce d’arbre et la saison.Mots-clĂ©s: chauves-souris Ă  tĂȘte de marteau, site de reproduction, effectif, effet de la saison, milieu urbain.Primary data on the space and time distribution of the hammer-headed bats, Hypsignathus monstrosus H. Allen, 1861 in the district of Plateau (Abidjan, CĂŽte d’Ivoire) The population ofhammer-headed bats, Hypsignathus monstrosus H. Allen, 1861, in the district of Plateau in Abidjan has been studied from August 2005 to July 2006. Vocalization recognition, direct observations and roost counts have been used in order to identify breeding sites, to determine the population size and its variations. Results show that the hammer-headed bats have demonstrated a high preference for reproduction site dominated by Terminalia catappa L. (Combretaceae).The population size of the hammer-headed bats was 6 ± 2 individuals during the study period. That population has remained stable from August to September, has decreased until January and has increased from February through April before decreasing and vanishing from June to July. The population size has varied with the tree species and season.Keywords: Hammer-headed bats, breeding site, population size, season effect, urban area

    Assessment of the Efficiency of Insecticide Paint and Impregnated Nets on Tsetse Populations: Preliminary Study in Forest Relics of Abidjan, Cîte d’Ivoire

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    Glossina palpalis palpalis is the main vector of human and animal trypanosomiasis in Cîte d’Ivoire. This species, being the only tsetse species in the city of Abidjan, is hosted by the National park of Banco located in the middle of Abidjan, the zoological park and in a relic forest within the University of Nangui-Abrogoua, both in Abidjan. A programme for the elimination of these suburban tsetse populations has been initiated, in the context of which various tsetse control tools have been evaluated. In the zoological park, insecticidal paint (Inesfly¼) was applied around the animal cages, and then supplemented with insecticide-impregnated netting around the larger animal cages. Tsetse population densities were monitored with Vavoua-style traps both inside the zoological park and in the site of University Nangui Abrogoua used as control site. Tsetse densities in the traps fell by over 90% following application of the insecticidal paint, and declined to zero after adding the insecticide impregnated nets in both study sites. The study confirms the close contact between tsetse populations from the zoological park and the University Nangui Abrogoua area, and shows that the sequential use of insecticide paint and impregnated nets can be effective for tsetse control
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