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Abstract

Previous work of the author (Physiological Zoology, 1957) has indicated that both temperature and altitude affect the rate of oxygen uptake in the flour beetle Tribolium confusum Duval. Experiments in which large and small larvae of the flour beetle were exposed to the same conditions of high altitude and low temperature also showed that the different age classes of larvae differed in their response to the conditions imposed; the large, nearly mature larvae usually survived while the small, very young larvae (1 to 2 mm.) usually did not. Project Number 79.

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