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Metabolic rate and respiratory gas-exchange patterns in tenebrionid beetles from the Negev Highlands, Israel

Frances D. Duncan^1,*, Boris Krasnov² and Megan McMaster³

¹ School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown 2193, South Africa,
² Ramon Science Center, Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Mizpe Ramon 80600, Israel and
³ School of Botany and Zoology, University of Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa

View larger version (37K): [in a new window]   Fig. 1. Recordings of the rate of CO2 emission by Akis goryi (mass 0.443 g), Scaurus puncticollis (mass 0.362 g), Trachyderma philistina (mass 0.541 g), T. hispida (mass 0.851 g), Pimelia grandis (mass 1.334 g) and Blaps sulcata (mass 0.919 g).

View larger version (26K): [in a new window]   Fig. 2. Recordings of the rate of CO2 emission by Zophosis complanata (mass 0.089 g), Z. punctata (mass 0.061 g) and Pimelia canescens (mass 0.27 3g). C marks the closed period, F marks the flutter period and B marks the burst period of a single discontinuous gas-exchange cycle.

View larger version (19K): [in a new window]   Fig. 3. Histograms showing the distribution of the number of miniature ventilations in each flutter period in (A) Zophosis complanata and (B) Z. punctata.