Models for the rates of pupal development, fat consumption and mortality in tsetse (Glossina spp)

Bulletin of Entomological Research
John W Hargrove, Glyn A Vale

Abstract

Environmental temperature is an important driver of the population dynamics of tsetse (Glossina spp) because the fly's immature stages are particularly vulnerable to temperatures (T) outside the range T = 16-32°C. Laboratory experiments carried out 50 years ago provide extensive measures of temperature-dependent rates of development, fat consumption and mortality in tsetse pupae. We improve on the models originally fitted to these data, providing better parameter estimates for use in population modelling. A composite function accurately models rates of pupal development for T = 8-32°C. Pupal duration can be estimated by summing the temperature-dependent daily percentage of development completed. Fat consumption is modelled as a logistic function of temperature; the total fat consumed during pupal development takes a minimum for T ≈ 25°C. Pupae experiencing constant temperatures <16°C exhaust their fat reserves before they complete development. At high temperatures, direct effects kill the pupae before fat stores are exhausted. The relationship between pupal mortality and temperature is well described by the sum of two exponential functions. Summing daily mortality rates over the whole pupal period does not reliably predict o...Continue Reading

Citations

Jan 1, 1978·Annual Review of Entomology·S S Tobe
Aug 1, 1967·Behaviour Research and Therapy·S Rachman, R J Hodgson
Apr 1, 1949·Biological Reviews of the Cambridge Philosophical Society·C H N JACKSON
May 23, 2012·PLoS Neglected Tropical Diseases·John W HargroveStephen J Torr
Dec 23, 2016·Parasite : Journal De La Société Française De Parasitologie·Pascal GrébautFrançois Bousquet

Related Concepts

Glossina
Pupa
Testosterone
Pupal Development
Population Group
Subcutaneous Fat
Research Study

Related Feeds

African Trypanosomiasis

African trypanosomiasis, also known as sleeping sickness, is an insect-borne parasitic disease of humans and other animals. It is caused by protozoa of the species Trypanosoma brucei and almost invariably progresses to death unless treated. Discover the latest research on African trypanosomiasis here.