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Seasonal elimination of some size classes in males of Glossina morsitans morsitans Westw. (Diptera, Glossinidae)

Published online by Cambridge University Press:  10 July 2009

R. J. Phelps  and
G. P. Y. Clarke
R. J. Phelps
Affiliation:
Division of Biological Sciences and Faculty of Science, respectively, University of Rhodesia, P.O. Box M.P. 167, Mount Pleasant, Salisbury, Rhodesia
G. P. Y. Clarke
Affiliation:
Division of Biological Sciences and Faculty of Science, respectively, University of Rhodesia, P.O. Box M.P. 167, Mount Pleasant, Salisbury, Rhodesia
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Abstract

Sizes of young field-collected males of Glossina morsitans morsitans Westw. were compared with those of teneral males emerging in the laboratory from field-collected puparia. Based on the mean size, indications were that smaller flies in field populations were selected against for about seven months in the year. A method is described for estimating the proportion of flies lost in the field population, and for the calculation of standard deviations for the estimates. Estimates of the extent of elimination showed that up to 35·2% of the total fly population in the field was eliminated in the cool months and up to 75·5% in the hot dry months.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 64 , Issue 2 , October 1974 , pp. 313 - 324
Copyright
Copyright © Cambridge University Press 1974

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