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Start Over Author "J.A. Deshazer" Topic acclimatization
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2. Thermoregulatory responses of laying hens under cyclic environmental temperature to intraventricular calcium and sodium

Author

A.A. Maki, J.A. Deshazer, Earl W. Gleaves, and M. M. Beck

Subjects
Hyperthermia, medicine.medical_specialty, Time Factors, Sodium, Oviposition, chemistry.chemical_element, Endogeny, Calcium, Sodium Chloride, Acclimatization, Body Temperature, Cerebral Ventricles, Calcium Chloride, Internal medicine, medicine, Animals, Injections, Intraventricular, Respiration, Broiler, General Medicine, Thermoregulation, Hypothermia, medicine.disease, Endocrinology, chemistry, Female, medicine.symptom, Chickens, Body Temperature Regulation
Abstract

1. Hens received ICV injections of Ca2+ (1.98 g/100 ml) or Na+ (7.25 g/100 ml) at 28 degrees C and, following acclimation, at 37 or 20 degrees C, respectively. 2. At 28 degrees C (thermoneutrality), rectal temperature rose (P less than 0.05) following Na+ and fell (P less than 0.05) following Ca2+, similar to mammals and broiler chickens. 3. At 37 degrees C, Ca2+-induced hypothermia did not occur; nor did the Na+-associated hyperthermia at 20 degrees C. 4. Acclimation to a high or low temperature may produce an endogenous shift in CSF ion levels that make additional ion administration ineffective in affecting body temperature.

Published
1988

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