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Observations on the habits of mosquitos of Plateau Province, Northern Nigeria, with particular reference to Aëdes (Stegomyia) vittatus (Bigot)

Published online by Cambridge University Press:  10 July 2009

J. P. T. Boorman
J. P. T. Boorman
Affiliation:
Virus Research Unit, West African Council for Medical Research, Yaba, Lagos, Nigeria.
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Summary

An account is given of a survey of the mosquitos of the Jos area of Northern Nigeria, during May–June 1960, particular attention being given to those species likely to be concerned with the transmission of arthropod-borne viruses. The area concerned is in the savannah belt at an altitude of about 4,000 ft., with numerous rocky outcrops. The dry season is fairly severe, and extends from about October to May; during this time, drinking water for the villages is obtained from deep wells. At the time of the survey, that is, at the beginning of the rainy season, the most abundant species were Culex univittatus Theo., Aëdes ingrami Edw., A. aegypti (L.), A. africanus (Theo.), A. luteocephalus (Newst.) and A. vittatus (Big.). The biting cycles of these species are illustrated.

A survey was carried out of the breeding habits of A. vittatus in rock holes; those most favoured were about a foot across and six to nine inches deep, and appeared to be of human origin. Larvae appeared rapidly in the holes after the first rains, and predators, particularly dragonfly nymphs and tadpoles, were common in the larger rock holes. Under natural conditions, the duration of the life-cycle was about five days. The survival of the early stages under adverse conditions was investigated in simple laboratory experiments. At normal temperatures, the pupae did not survive desiccation for six hours, and, though the resistance of larvae to drying was not tested fully, it is considered that they are probably no more resistant than are pupae. Eggs survived desiccation for 10 but not for 18 weeks. Water temperature in exposed rock holes was not a factor limiting development, but the temperature of the exposed surface of dry rock holes was such that it appeared unlikely that eggs in these exposed situations would be able to survive the dry season. It was suggested that there may be collections of water in sheltered tree holes or rock holes which support a small but more or less continuously breeding population; this, combined with the ability of the eggs of A. vittatus to withstand desiccation for at least ten weeks at normal temperatures would enable the species to survive the relatively prolonged dry season.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 52 , Issue 4 , December 1961 , pp. 709 - 725
Copyright
Copyright © Cambridge University Press 1961

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References

Anon. [1952]. Annual Report, Yellow Fever Research Institute, Yaba, Lagos, 1951 pp. 29–30. (Unpublished.)Google Scholar
Anon. [1954]. Annual Report, Yellow Fever Research Institute, Yaba, Lagos, 1953 pp. 35–36. (Unpublished.)Google Scholar
Bauer, J. H. (1928). The transmission of yellow fever by mosquitoes other than Aedes aegypti.—Amer. J. trop. Med. 8 pp. 261–282.CrossRefGoogle Scholar
Boorman, J. (1960a). Studies on the biting habits of the mosquito Aedes (Stegomyia) aegypti, Linn., in a West African village.—W. Afr. med. J. (N.S.) 9 pp. 111–122.Google Scholar
Boorman, J. (1960b). Studies on the biting habits of six species of Culicine mosquitoes in a West African village.—W. Afr. med. J. (N.S.) 9 pp. 235–246.Google Scholar
SirChristophers, S. B. (1960). Aëdes aegypti (L.), the yellow fever mosquito: its life history, bionomics and structure.—739 pp. London, Cambridge Univ. Pr.Google Scholar
Dick, G. W. A. & Haddow, A. J. (1952). Uganda S virus. A hitherto unrecorded virus isolated from mosquitoes in Uganda. (I.)— Trans. R. Soc. trop. Med. Hyg. 16 pp. 600–618.CrossRefGoogle Scholar
Dick, G. W. A., Kitchen, S. F. & Haddow, A. J. (1952). Zika virus. (I.)— Trans. R. Soc. trop. Med. Hyg. 16 pp. 509–520.CrossRefGoogle Scholar
Farid, M. A. (1949). Relationships between certain populations of Culex pipiens Linnaeus and Culex quinquefasciatus Say in the United States.—Amer. J. Hyg. 19 pp. 83–100.Google Scholar
Haddow, A. J. (1954). Studies of the biting-habits of African mosquitos. An appraisal of methods employed, with special reference to the twenty-four-hour catch.—Bull. ent. Res. 45 pp. 199–242.CrossRefGoogle Scholar
Hinton, H. E. (1951). A new Chironomid from Africa, the larva of which can be dehydrated without injury.—Proc. zool. Soc. Lond. 121 pp. 371–380.CrossRefGoogle Scholar
Hinton, H. E. (1960). Cryptobiosis in the larva of Polypedilum vanderplanki Hint. (Chironomidae).—J. Insect Physiol. 5 pp. 286–300.CrossRefGoogle Scholar
Kirk, R. (1941). An epidemic of yellow fever in the Nuba Mountains, Anglo-Egyptian Sudan.—Ann. trop. Med. Parasit. 35 pp. 67–112.CrossRefGoogle Scholar
Lumsden, W. H. E. & Van Someren, E. C. C. (1953). Records of Culex species (Diptera: Culicidae) from West Nile District, Uganda, with notes on their behaviour.—Proc. R. ent. Soc. Lond. (B) 22 pp. 19–22.Google Scholar
Mattingly, P. F. (1947). Notes on the early stages of certain Ethiopian mosquitoes, with some locality records from British West Africa.—Ann. trop. Med. Parasit. 41 pp. 239–252.CrossRefGoogle ScholarPubMed
Mattingly, P. F. (1949). Studies on West African mosquitos. Part I. The seasonal distribution, biting cycle and vertical distribution of four of the principal species.—Bull. ent. Res. 40 pp. 149–168.CrossRefGoogle Scholar
Mattingly, P. F. (1952). The sub-genus Stegomyia (Diptera, Culieidae) in the Ethiopian Eegion. I.—Bull. Brit. Mus. (nat. Hist.) Ent. 2 pp. 235–304.Google Scholar
Philip, C. B. (1929). Preliminary report of further tests with yellow fever transmission by mosquitoes other than Aedes aegypti.—Amer. J. trop. Med. 9 pp. 267–269.CrossRefGoogle Scholar
Smithburn, K. C., Haddow, A. J. & Lumsden, W. H. R. (1949). An outbreak of sylvan yellow fever in Uganda with Aedes (S.) africanus Theobald as principal vector and insect host of the virus.—Ann. trop. Med. Parasit. 13 pp. 74–89.CrossRefGoogle Scholar
Weinbren, M. P. & Williams, M. C. (1958). Zika virus: further isolations in the Zika area, and some studies on the strains isolated.—Trans. R. Soc. trop. Med. Hyg. 52 pp. 263–268.CrossRefGoogle ScholarPubMed