Metabolic rate variation in Glossina pallidipes (Diptera: Glossinidae): Gender, ageing and repeatability
Date
2004
Authors
Terblanche J.S.
Klok C.J.
Chown S.L.
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Abstract
Despite the importance of metabolic rate in determining flight time of tsetse and in mediating the influence of abiotic variables on life history parameters (and hence abundance and distribution), metabolic rate measurements and their repeatability have not been widely assessed in these flies. We investigate age-related changes in standard metabolic rate (SMR) and its repeatability, using flow-through respirometry, for a variety of feeding, gender and pregnancy classes during early adult development in laboratory-reared individuals of the tsetse fly, Glossina pallidipes. Standard metabolic rate (144-635 μW) was generally within 22% of previous estimates, though lower than the values found using closed system respirometry. There was no significant difference between the genders, but metabolic rate increased consistently with age, probably owing to flight muscle development. Repeatability of metabolic rate was generally high (r=0.6-0.9), but not in younger teneral adults and pregnant females (r≈0.05-0.4). In these individuals, low repeatability values are a consequence of muscle or in utero larval development. Tsetse and other flies generally have a much higher metabolic rate, for a given size, than do other insect species investigated to date. © 2004 Elsevier Ltd. All rights reserved.
Description
Keywords
carbon dioxide, age-related difference, intraspecific variation, metabolism, sex-related difference, aging, analysis of variance, animal, article, basal metabolic rate, body constitution, comparative study, feeding behavior, female, growth, development and aging, male, metabolism, nutritional status, physiology, regression analysis, reproduction, sex difference, species difference, starvation, tsetse fly, Aging, Analysis of Variance, Animals, Basal Metabolism, Body Constitution, Carbon Dioxide, Feeding Behavior, Female, Male, Nutritional Status, Regression Analysis, Reproduction, Sex Factors, Species Specificity, Starvation, Tsetse Flies, Diptera, Glossina (proper), Glossina pallidipes, Glossinidae, Insecta
Citation
Journal of Insect Physiology
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50
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