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The ecology of Aedes (Stegomyia) africanus (Theobald) in a tropical forest in Uganda: mark-release-recapture studies on a female adult population

Published online by Cambridge University Press:  19 September 2011

S. D. K. Sempala
S. D. K. Sempala
Affiliation:
Department of Entomology and Vertebrate Zoology, Uganda Virus Research Institute, P.O. Box 49, Entebbe, Uganda
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Abstract

Two mark-release-recapture experiments were carried out on a female population of A. africanus in the Zika Forest, in Uganda, to estimate density, survival rates, dispersal range and duration of the gonotrophic cycle. Marking was achieved using powdered fluorescent pigments and wet paint. In the first experiment, unfed A. africanus female mosquitoes were marked and released. A high overall recapture rate of 17.6% was recorded consisting mainly of first recaptures (up to 85.6%). The highest recapture rate was recorded during the first 4 days after release. Using Jolly's Stochastic Model, daily population estimates ranged from 1386 to 8406 during the first 7 days of release. The daily average population estimated over the first 10 days was 3591. Using the Simple Lincoln Index, population estimates ranged from 1104 mosquitoes to 16,320 with an average daily estimate of 3706. Of interest was the fact that the average daily population estimates using the two methods were not statistically significant. The 24-hr survival rate averaged over 9 days was 0.9228. Dispersal was rather random, and appeared to be of a limited range with an average distance of 50 m. In the second experiment, which involved marking only fully engorged mosquitoes, an overall recapture rate of 7.1% was recorded, with an average daily survival rate of 0.8209 averaged over the first 4 days. The pattern of recaptures indicated a gonotrophic cycle of 5–6 days with a small proportion of mosquitoes seeking secondary feeds during the first 48 hr. It was generally observed that marking and handling did not have any marked effect on mosquitoes during the first 8 days.

Keywords

Tropical forestmark-release-recapturepopulation studiesgonotrophic cyclesdispersalZika ForestAedes africanus
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 1 , Issue 3 , September 1981 , pp. 211 - 224
Copyright
Copyright © ICIPE 1981

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References

REFERENCES

Buxton, A. P. (1952) Observation on the diurnal behaviour of the red tail monkey (Cercopithecus ascanius schmidti) (Matschie) in a small forest in Uganda. J. Anim. Ecol. 21, 25–58.CrossRefGoogle Scholar
Conway, G. R., Trpis, M. and Mcclelland, G. A. H. (1974) Population parameters of the mosquito Aedes aegypti (L) estimated by mark-release-recapture in a suburban habitat in Tanzania. J. Anim. Ecol. 43, 289–304.CrossRefGoogle Scholar
Corbet, P. S. (1964) Observations on mosquitoes ovipositing in small containers in Zika Forest, Uganda. J. Anim. Ecol. 33, 141–164.CrossRefGoogle Scholar
Fisher, R. A. and Ford, E. B. (1947) The spread of a gene in natural conditions in a colony of the moth Panaxia dominula (L). Heredity, Lond. 1, 143–174.CrossRefGoogle Scholar
Gillett, J. D. (1971) Mosquitoes. Weidenfeld & Nicolson, London.Google Scholar
Haddow, A. J. (1954) Studies on the biting habits of African mosquitoes. An appraisal of methods employed, with special reference to 24-hour catch. Bull. ent. Res. 45, 199–242.Google Scholar
Haddow, A. J. (1961) Studies on the biting habits and medical importance of East African mosquitoes in the genus Aedes. II. Subgenera Mucidus, Deceromyia, Finlaya and Stegomyia. Bull. ent. Res. 52, 317–351.Google Scholar
Haddow, A. J. (1964) Observations on the biting habits of mosquitoes in the forest canopy at Zika, Uganda with special reference to the crepuscular periods. Bull. ent. Res. 55, 589–608.Google Scholar
Haddow, A. J. (1968) The natural history of yellow fever in Africa. Proc. R. Soc. Edinburgh 70, 191–227.Google Scholar
Haddow, A. J. and Ssenkubuge, Y. (1965) Entomological studies from a high steel tower in Zika Forest, Uganda. Part I. The biting activity of mosquitoes and tabanids as shown by 24-hour catches. Trans. R. ent. Soc. Lond. 117, 215–243.Google Scholar
Jolly, G. M. (1965) Explicit estimate from capture-recapture data with both death and immigration-Stochastic Model. Biometrika 52, 225–247.CrossRefGoogle ScholarPubMed
Kerr, J. A. (1933) Studies on the abundance, distribution and feeding habits of some West African mosquitoes. Bull. ent. Res. 24, 493–510.CrossRefGoogle Scholar
McClelland, G. A. H. and Conway, G. R. (1971) Frequency of blood feeding in the mosquito Aedes aegypti. Nature, Lond. 232, 485–486.Google Scholar
Mattingly, P. F. (1952) The sub-genus Stegomyia (Diptera, Culicidae) in the Ethiopian Region. Part I. Bull. Brit. Mus. (Nat. Hist.), Entomology 2.Google Scholar
Philip, C. B. (1929) Preliminary report of further tests with yellow fever transmission by mosquitoes other than Ae. aegypti. Am. J. trop. med. 9, 267–269.Google Scholar
Reuben, R., Yasuno, M., Panicker, K. A. and Labrecque, G. C. (1973) The estimation of adult population of Ae. aegypti at two localities in Delhi, India. India J. comm. Dis. 5, 154–164.Google Scholar
Service, M. N. (1976) Mosquito Ecology. Applied Science, England.Google Scholar
Sheppard, P. M., MacDonald, W. W., Tonn, R. J. and Grab, B. (1969) The dynamics of an adult population of Ae. aegypti in relation to dengue haemorrhagic fever in Bangkok. J. Anim. Ecol. 38, 661–702.Google Scholar
Southwood, T. R. (1966) Ecological Methods. Methuen, London.Google Scholar
Woodall, J. P. (1964) The virus isolated from arthropods at the East African Virus Research Institute in 26 years ending December 1963. Proc. E. Afr. Acad. 2, 141–146.Google Scholar