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Measurements of Temperature and Light in artificial Pools with Reference to the larval Habitat of Anopheles (Myzomyia) gambiae, Giles, and A. (M.) funestus, Giles

Published online by Cambridge University Press:  10 July 2009

A. J. Haddow
A. J. Haddow
Affiliation:
Medical Research Council Junior Fellow in Tropical Medicine.
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Extract

1. Two series of hourly measurements of temperature and light intensity, each extending over 24 hours, were made in artificial pools. One pool contained clear water, one muddy water, one standing grass 1 ft. high and one was completely shaded by papyrus matting at a height of 1 ft. Shade temperature records were kept in a Stevenson screen.

2. The results showed that the grass had a pronounced insulating effect on temperature. The range in the grassy pool was less than that in the screen and less than half than that in the open pool. The grassy pool was warmer by night and cooler by day than the open pool. No essential difference was noted between the temperature cycle of the clear open pool and the muddy open pool nor between the grassy pool with broken shade and the pool receiving complete shade from matting. Maximum light intensity in the grassy pool was less than half that attained in the open pool.

3. It is concluded that not only do the breeding waters of A. gambiae reach much higher temperatures than those of such species as A. funestus, A. coustani and A. pharoensis, but that they also undergo much greater temperature fluctuations.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 34 , Issue 2 , July 1943 , pp. 89 - 93
Copyright
Copyright © Cambridge University Press 1943

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References

De Meillon, B. (1934). Entomological studies—Observations on Anopheles funsetus and Anopheles gambiae in the Transvaal.—Pub. S. Afr. Inst. med. Res. 6 no. 32, pp. 195–248.Google Scholar
Thomson, R. C. M. (1940). Studies on the behaviour of Anopheles minimus. Part III. The influence of water temperature on the choice and suitability of the breeding place.—J. Malar. Inst. India, 3, pp. 323–348.Google Scholar