Calorimetric investigations on physiological stress in Tenebrio molitor (Coleoptera, Tenebrionidae) pupae

Individual variation in the susceptibility to handling stress (mechanical irritation) in laboratory-reared pupae of yellow mealworm, Tenebrio molitor, was studied by means of simple thermocouple twin set-up calorimeters. The stress condition was characterised by disturbances in normal rhythms of gas...

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Bibliographic Details
Published in:Thermochimica acta 1998-01, Vol.309 (1), p.57-61
Main Authors: Harak, Margus, Kuusik, Aare, Hiiesaar, Külli, Metspalu, Luule, Luik, Anne, Tartes, Urmas
Format: Article
Language:English
Subjects:
Biological and medical sciences
Direct calorimetry
Fundamental and applied biological sciences. Psychology
Gas exchange
Insecta
Insects
Invertebrates
Life cycle. Embryology. Development
Physiology. Development
Respirometry
Standard metabolic rate
Tenebrio
Water loss
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Summary:Individual variation in the susceptibility to handling stress (mechanical irritation) in laboratory-reared pupae of yellow mealworm, Tenebrio molitor, was studied by means of simple thermocouple twin set-up calorimeters. The stress condition was characterised by disturbances in normal rhythms of gas exchange and body stereotyped movements well distinguishable from calorimetric recordings. Recovering time from stress, induced by the device, was 10–15 min. In every newly established population, a portion of pupal individuals (13–15%) was highly sensitive to handling and these pupae lost significantly more water than the pupae exhibiting no symptoms of stress.
ISSN:0040-6031
1872-762X
DOI:10.1016/S0040-6031(97)00422-X