Abstract
Summary
1. Survival of larval R. cates-biana is not affected by regulation of body temperature (to 3°C or 23°C) during whole-body irradiation; prolonged refrigeration subsequent to irradiation fosters survival, but only for as long as the animals are kept at the reduced temperature (3°C); upon return to 23°C the mortality characteristics develop in essentially the same pattern as larvae maintained at 23°C immediately subsequent to irradiation. 2. As compared with those irradiated at lower temperatures, 2–9°C, larval A. punctatum and/or A. maculatum irradiated at higher temperatures, 28–33°C, and subsequently maintained at room temperature, exhibit definitely more abnormal (externally observable) responses, as well as greater damage to digestive epithelium and elements of the developing eye and brain wall. 3. Adult T. viridescens irradiated at 3°C exhibit, during the first 5 post-irradiation weeks, a significantly lower mortality rate than those irradiated at 26°C, both having been returned to 23°C immediately after exposure.
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