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Seasonal variations in
populations of Glossina morsitans centralis Machado samples at deflying pickets
in Zambia, by K. Newberry, Zambia Journal of Science & Technology,
Vol.3, no.2, April 1978 Pg. 35-41.
Records of catches at a tsetse fly picket worked by the Department of Veterinary
and Tsetse Control Services, Zambia, were examined for the period 1969 to 1974.
A consistent rhythm of low and high catch of flies per unit traffic was found to
coincide with the first and second halves of each calendar year respectively,
with a higher female percentage in the catches of the second halves. Male flies
caught at several pickets were studied during 1973 and 1974 and found to be
smaller, as assessed by wing vein measurement, in the second halves of each
year. No single environmental factor satisfactorily explained these variations
in the tsetse population
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