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Journal of Experimental Biology 17,386-395 (1940)
Published by Company of Biologists 1940

The Physiological Action of Abnormally High Temperatures on Poikilotherm Animals : II. The Respiration at High Sublethal and Lethal Temperatures

G. S. FRAENKEL ¹ and G. V. B. HERFORD ¹

¹ Department of Zoology and Applied Entomology, Imperial College of Science and Technology, London, S.W.7

The oxygen consumption of blowfly larvae at sublethal and lethal high temperatures at the beginning of the determination is entirely dependent on the oxygen pressure, but after about 1 hr. at 42°C. it is higher at 20 and 10% partial pressure of oxygen than at either 100 or 5%. Death at high temperatures is not due to lack of oxygen, but may be due to the accumulation of acid waste products of the metabolism.

The basal oxygen consumption remains unchanged for some time after the organism has been irreversibly injured by the high temperature.

Blowfly larvae resist the damaging effect of high temperatures slightly better in air (20% oxygen) than in either very high (100%) or very low (less than 10%) concentrations of oxygen.

Note:

First paper of this series : Fraenkel G. S. & Hopf, H. S. (1940) Biochem. J. 34, 1085.