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Notes on the Bionomics of Anopheles elutus, Edw. (Dipt., Culic.)

Published online by Cambridge University Press:  10 July 2009

G. Mer
G. Mer
Affiliation:
Malaria Research Station (Rosh Pinah), Department of Hygiene, Hebrew University, Jerusalem.
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Extract

(1) A. elutus females in Palestine show seasonal variations of fertility, but these do not appear to explain fully the distribution of adults throughout the year.

(2) Females of the overwintering generations show low fertility. This depends probably on conditions of larval life.

(3) The seasonal changes in the egg of A. elutus in Palestine are due to temperature variations. It is suggested that these changes are protective adaptations against cold in winter and excessive heat and irradiation in summer.

(4) The entering of the hibernation stage of A. elutus in Palestine cannot be considered as a pure consequence of the low temperature in autumn, since spring activity begins at a much lower temperature.

(5) During hibernation the females feed, but do not bring eggs to maturity ; the blood is used for fat accumulation.

(6) During the second half of the hibernation period the females lose their reserve materials.

(7) Full fat females starved in the laboratory lose their fat-body reserves, and simultaneously their ovaries develop to stage 2. Under the prevailing temperature the process requires about 3 weeks.

(8) A slow development of the ovary is going on during hibernation, but never proceeds beyond the second stage. The ovaries in a large percentage of females reach this stage at all times when reactivity occurs at the end of the hibernation period.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 22 , Issue 1 , April 1931 , pp. 137 - 145
Copyright
Copyright © Cambridge University Press 1931

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References

1.Kligler, I. J., Schapiro, J. M. & Weitzman, I.Malaria in Rural Settlements in Palestine.—J. Hyg., xxiii, 1924, p. 280.CrossRefGoogle Scholar
2.Kligler, I. J.Epidemiology and Control of Malaria in Palestine.—Univ. Chicago Press. 1930.Google Scholar
3.Weidling, K.Die Beeinflussung von Eiröhrenzahl und -grösse einiger Dipteren durch Hunger im Larvastadium.—Zs. angew. Ent., xiv, 1928, p. 69.Google Scholar
4.Theodor, O.Observations on Palestinian Anopheles.—Bull. Ent. Res., xii, 1925, p. 377.CrossRefGoogle Scholar
5.Grassi, B.Sull' Anopheles elutus.—Atti R. Accad. Naz. Lincei, (5) xxxiii, 1924, p. 207.Google Scholar
6.Edwards, F. W.A Revision of the Mosquitos of the Palaearctic Region.—Bull. Ent. Res., xii, 1921, p. 273.Google Scholar
7.MacGregor, M. E.—Mosquitos under Winter Conditions.—Bull. Ent. Res., xv, 1924, p. 357.Google Scholar
8.Grassi, B.Osservazioni sulla biologia degli Anofeli.—Ann. d'Igiene, xxxi, fasc. 6, 1921, p. 329.Google Scholar
9.Roubaud, E. & Colar-Belcour, J.Inertie biologique spontanée (asthenobiasis) nécessitant réactivation par le froid (athermobiasis).—C.R. Acad. Sci. France, clxxxii, 1926, p. 871.Google Scholar
10.Roubaud, E.Les désharmonies de la fonction rénale et leur conséquences biologiques chez les moustiques.—Ann. Inst. Pasteur, xxxvii, 1923, p. 627.Google Scholar
11.Kligler, I. J.Notes on the Hibernation of Anopheles Mosquitos in Palestine.—Bull. Ent. Res., xiv, 1923, p. 403.Google Scholar
12.Christophers, S. R., Sinton, J. A. & Covell, G. How to do a Malaria Survey.—Health Bull., no. 14 (Malaria Bur., no. 6), Calcutta, 1928, p. 61.Google Scholar