Abstract
The entomological survey during the preparatory phase of the Malaria Eradication Pilot Project in Ghana included a programme of age-grouping dissections on the local malaria vectors. After an initial year spent on the older methods, some 1700 female mosquitos were dissected following Detinova's techniques. These latter results, though limited to a division of the nulliparous from the parous, are examined in detail to discover what they reveal of the age-structure of the anopheline populations concerned.
Analysis of the proportion parous of A. gambiae populations showed, inter alia, that they fluctuated considerably in age make-up from week to week, even though appearing fairly stable over longer periods. The risk of calculating survival probabilities without an exact knowledge of the structure of the nulliparous population is also illustrated, and it is suggested that such estimations should be restricted to an expression of the proportion parous.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- BERTRAM D. S., SAMARAWICKREMA W. A. Age determination for individual Mansonioides mosquitoes. Nature. 1958 Aug 16;182(4633):444–446. doi: 10.1038/182444a0. [DOI] [PubMed] [Google Scholar]
- DAVIDSON G. Measurement of the ampulla of the oviduct as a means of determining the natural daily mortality of Anopheles gambiae. Ann Trop Med Parasitol. 1955 Mar;49(1):24–36. doi: 10.1080/00034983.1955.11685648. [DOI] [PubMed] [Google Scholar]
- GILLIES M. T. A modified technique for the age-grading of populations of Anopheles gambiae. Ann Trop Med Parasitol. 1958 Oct;52(3):261–273. doi: 10.1080/00034983.1958.11685867. [DOI] [PubMed] [Google Scholar]
- GILLIES M. T. The duration of the gonotrophic cycle in Anopheles gambiae and Anopheles funestus, with a note on the efficiency of hand catching. East Afr Med J. 1953 Apr;30(4):129–135. [PubMed] [Google Scholar]
- GILLIES M. T. The pre-gravid phase of ovarian development in anopheles funestus. Ann Trop Med Parasitol. 1955 Oct;49(3):320–325. doi: 10.1080/00034983.1955.11685681. [DOI] [PubMed] [Google Scholar]
- HAMON J., CHAUVET G., THELIN L. [Observations on the methods of evaluation of the physiological age of female Anopheles]. Bull World Health Organ. 1961;24:437–443. [PMC free article] [PubMed] [Google Scholar]
- LEWIS D. J. The recognition of nulliparous and parous Anopheles gambiae by examining the ovarioles. Trans R Soc Trop Med Hyg. 1958 Sep;52(5):456–461. doi: 10.1016/0035-9203(58)90133-0. [DOI] [PubMed] [Google Scholar]