Eur. J. Entomol. 91 (3): 297-305, 1994

Developmental changes during metamorphosis in Tenebrio molitor (Coleoptera: Tenebrionidae) studied by calorimetric thermography

KUUSIK A., TARTES U., HARAK M., HIIESAAR K., METSPALU L.
N/A

Basal metabolism, evaluated as heat production during the period of metamorphosis in Tenebrio molitor, was precisely measured with the use of differential calorimeters. After larval-pupal apolysis characteristic and consecutive metabolic phases were observed: declining, plateau, ascending and pre-ecdysal steep-falling phases. At the moment of breaking the old integument, a sharp peak of the cooling effect. caused by exuvial fluid, was recorded on the thermogram; thus, the exact time of ecdysis and the length of the interecdysal period were determined. By using thermography, also regular periods of muscular activity in metamorphosis stages were monitored and midgut purging after feeding period was timed.

Keywords: Development, metamorphosis, basal metabolic level, heat production, thermography, muscular activity, apolysis, ecdysis, midgut purging, Tenebrio molitor

Accepted: February 5, 1994; Published: August 5, 1994  Show citation

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KUUSIK, A., TARTES, U., HARAK, M., HIIESAAR, K., & METSPALU, L. (1994). Developmental changes during metamorphosis in Tenebrio molitor (Coleoptera: Tenebrionidae) studied by calorimetric thermography. EJE, 91(3), 297-305
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