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Age composition and survival rate of anopheles gambiae giles complex diptera culicidae in baringo district kenya


Age composition and survival rate of anopheles gambiae giles complex diptera culicidae in baringo district kenya



Journal of Applied Entomology 107(4): 387-394



ISSN/ISBN: 0931-2048

Adult populations of Anopheles gambiae (Sensu lato) were sampled over a nine-month period in two habitats in Baringo district, Kenya. The habitats were the Perkerra irrigation scheme and the Loboi Swamp. The sampling period covered parts of the dry season (January-March), the long rainy season (March-June), the cool dry period (July-September) and the beginning of the short rains (October-December). The age composition and survival rates of females were estimated from parous ratios based on ovarian dissections. There was a seasonal variation in the age composition both within and between habitats. Parous rates were lowest in the dry season and highest in the cool dry season. In both habitats there was a significant difference between the lowest and highest parous rates (p < 0.010). Mean parous rates were significantly higher at Perkerra than at Loboi (p < 0.01). Daily survival rates were significantly higher at Perkerra than at Loboi (p < 0.001). The higher survival rate at Perkerra was thought to be due to factors related to irrigation, in particular the provision of cooler and more humid micro-climates by growing crops and shade trees. The implications of these results to malaria transmission is discussed.

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Accession: 006992896

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Related references

Age composition and survival rate of Anopheles gambiae Giles complex (Dipt., Culicidae) in Baringo district, Kenya. Journal of Applied Entomology 1074: 387-394, 1989

Age composition and survival rate of Anopheles gambiae Giles complex (Dipt., Culicidae) in Baringo district, Kenya. Zeitschrift für Angewandte Entomologie 107(4): 387-394, 1989

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