Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-25T05:05:26.894Z Has data issue: false hasContentIssue false
  • English
  • Français

Seasonal variations in the fat content and size of Glossina swynnertoni Austen.

Published online by Cambridge University Press:  10 July 2009

J. P. Glasgow  and
E. Bursell
J. P. Glasgow
Affiliation:
East African Trypanosomiasis Research Organization, Tororo, Uganda.
E. Bursell
Affiliation:
East African Trypanosomiasis Research Organization, Tororo, Uganda.
Get access Rights & Permissions [Opens in a new window]

Extract

A population of Glossina swynnertoni Aust., at Shinyanga, Tanganyika, has been studied in respect of size and fat content of non-teneral males by monthly samples over a period of 13 years.

Flies are large from February to July and small from August to January, and this change in size suggests an effect of the wet season (December to May) and dry season (June to November) upon the parent females, allowing for the time-lag of two months representing pupal development and mean age of adult males at capture. Male flies have more fat in the rains and less in the dry season and it is possible that similar changes in the nutritional status of females are responsible for the observed size changes.

The correlation found in earlier work between the size of male flies in any month and saturation deficit two months earlier is confirmed, but reasons are given for rejecting a simple causal interpretation of this correlation.

Since 1951, there has been a progressive decrease in size of G. swynnertoni in the area studied, more especially as regards those produced in the dry season.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 51 , Issue 4 , January 1961 , pp. 705 - 713
Copyright
Copyright © Cambridge University Press 1961

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bursell, E. (1960). The measurement of size in tsetse flies (Glossina).—Bull. ent. Res. 51 pp. 33–37.CrossRefGoogle Scholar
Bursell, E. (in press). The behaviour of tsetse flies (Glossina swynnertoni Austen) in relation to problems of sampling.—Proc. R. ent. Soc. Lond. (A) 36.Google Scholar
Burtt, E. (1952). The occurrence in nature of tsetse pupae (Glossina swynnertoni Austen).—Acta trop. 9 pp. 304–344.Google Scholar
Buxton, P. A. (1955). The natural history of tsetse flies.—Mem. Lond. Sch. Hyg. trop. Med. no. 10, 816 pp. London, Lewis.Google Scholar
Harley, J. M. B. (1958). Host relationships of Glossina swynnertoni.—Rep. E. Afr. Tryp. Res. Org. 1956–57 pp. 67–70.Google Scholar
Harrison, H. (1936). The Shinyanga game experiment: a few of the early observations—J. Anim. Ecol. 5 pp. 271–293.CrossRefGoogle Scholar
Isherwood, F. (1957). The resting sites of Glossina swynnertoni Aust. in the wet season.—Bull. ent. Res. 48 pp. 601–606.CrossRefGoogle Scholar
Jackson, C. H. N. (1933). The causes and implications of hunger in tsetse-flies.—Bull. ent. Res. 24 pp. 443–482.Google Scholar
Jackson, C. H. N. (1937). Some new methods in the study ofGlossina morsitans.—Proc. zool. Soc. Lond. 1936 pp. 811–896.Google Scholar
Jackson, C. H. N. (1946). An artificially isolated generation of tsetse flies (Diptera).—Bull. ent. Res. 37 pp. 291–299.Google Scholar
Jackson, C. H. N. (1948). Some further isolated generations of tsetse flies.—Bull. ent. Res. 39 pp. 441–451.CrossRefGoogle ScholarPubMed
Jackson, C. H. N. (1953). Seasonal variations in the mean size of tsetse flies.—Bull. ent. Res. 43 pp. 703–706.Google Scholar
Lloyd, H. M. (1935). Notes on the bionomics of Glossina swynnertoni, Austen.—Bull. ent. Res. 26 pp. 439–468.CrossRefGoogle Scholar
Moran, P. A. P. (1952). The statistical analysis of game-bird records.—J. Anim. Ecol. 21 pp. 154–158.CrossRefGoogle Scholar
Southon, H. A. W. (1959). Studies in predation on Glossina.—Rep. E. Afr. Tryp. Res. Org. 1958 pp. 56–58.Google Scholar
Willett, K. C. (1953). The laboratory maintenance of Glossina. I.—Parasitology 43 pp. 110–130.Google Scholar