Mortality estimates from ovarian age distributions of the tsetse fly Glossina pallidipes Austen sampled in Zimbabwe suggest the need for new analytical approaches

Bulletin of Entomological Research
J W Hargrove, S F Ackley

Abstract

Mortality estimates are central to understanding tsetse fly population dynamics, but are difficult to acquire from wild populations. They can be obtained from age distribution data but, with limited data, it is unclear whether the assumptions required to make the estimates are satisfied and, if not, how violations affect the estimates. We evaluate the assumptions required for existing mortality estimation techniques using long-term longitudinal ovarian dissection data from 144,106 female tsetse, Glossina pallidipes Austen, captured in Zimbabwe between 1988 and 1999. At the end of the hot-dry season each year, mean ovarian ages peaked, and maximum-likelihood mortality estimates declined to low levels, contrary to mark-recapture estimates, suggesting violations of the assumptions underlying the estimation technique. We demonstrate that age distributions are seldom stable for G. pallidipes at our study site, and hypothesize that this is a consequence of a disproportionate increase in the mortality of pupae and young adults at the hottest times of the year. Assumptions of age-independent mortality and capture probability are also violated, the latter bias varying with capture method and with pregnancy and nutritional status. As a c...Continue Reading

References

Jun 14, 2019·Bulletin of Entomological Research·J W Hargrove, Glyn Vale
Oct 27, 2018·BMJ Global Health·Y-Ling ChiPeter Smith
May 26, 2017·Cadernos de saúde pública·Patricia Coelho De Soarez, Hillegonda Maria Dutilh Novaes
May 8, 2020·PLoS Neglected Tropical Diseases·Elisha B Are, J W Hargrove
Dec 13, 2017·Infectious Diseases of Poverty·Bernadette Ramirez, TDR-IDRC Research Initiative on Vector Borne Diseases and Climate Change

Citations

Jan 1, 1989·Medical and Veterinary Entomology·R D DransfieldD A Adabie
Aug 1, 1988·Parasitology·D J Rogers
Apr 1, 1970·Bulletin of Entomological Research·C F Curtis, A M Jordan
Sep 14, 1999·Medical and Veterinary Entomology·J W Hargrove
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Mar 28, 2008·Aging Cell·James R CareyPablo Liedo
Mar 19, 2011·Medical and Veterinary Entomology·J W HargroveJ E Ameh
Jun 23, 2012·PloS One·Vasiliy N NovoseltsevAlicia M Ellis

Related Concepts

In Silico
Study
Glossina
Likelihood Functions
Ovary
Senility
Glossina austeni
Wild bird
Ovarian Carcinoma
Glossina longipennis

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