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Comparison of the influence of hunger and thirst on rat's foraging behaviour in a hostile environment
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2. Henderson, C.J., B u t l e r , S . R . and Glass, A. Electroenceph. c l i n . Neurophys i o l . , 39 (1975) 117-130. 3. J e f f r e y s , D.A. and Axford, J.G. Exp. Brain Res., 16 (1972) 1-40. 4. Lesevre, N. Ann. N.Y. Acad. S c i . , 388 (1982) 156-182.
COMPARISON OF THE INFLUENCE OF HUNGER AND THIRST ON RAT'S FORAGINGBEHAVIOUR IN A HOSTILE ENVIRONMENT CABANAC, M. Laboratoire de Physiologie, Facult~ de M~dicine, Universit~ Laval, Quebec, P.Q., Canada GIK 7P4 Rats were trained to eat 2 h per day, the food offered was placed at 16 mm from a warm refuge and the ambient temperature was -15 ° C. They were fasted for O, 12, 33, 46, 70 and 94 h r e s p e c t i v e l y p r i o r to the six feeding sessions. Speed of eating and meal duration were not influenced by food deprivation. Amount eaten, number of meals, time spent at the restaurant, speed of running to the feeder and number of foraging rats increased from 0 h fast to 22 h then reached a plateau f o r the 46, 70 and 94 h f a s t s . The same experiment was carried a f t e r water deprivation f o r O, 12, 22, 46 and 70 h. Rats could f i n d water at -15 ° C and at 16 m from t h e i r warm refuge. Speed of running to water and rate of drinking were not influenced by water dep r i v a t i o n . Amount drunk, drinking bout duration, number of drinking bouts, total drinking time and number of drinking rats increased monotoneously from 0 h to 70 h d e p r i v a t i o n . Two main conclusions are drawn from these data: I) in the r a t , up to 70 h d e p r i v a t i o n , the motivation to eat seems to be stronger than the motivation to d r i n k ; 2) to s a t i s f y hunger or t h i r s t , elements of behaviour.
the nervous system uses d i f f e r e n t motor
2. Henderson, C.J., B u t l e r , S . R . and Glass, A. Electroenceph. c l i n . Neurophys i o l . , 39 (1975) 117-130. 3. J e f f r e y s , D.A. and Axford, J.G. Exp. Brain Res., 16 (1972) 1-40. 4. Lesevre, N. Ann. N.Y. Acad. S c i . , 388 (1982) 156-182.
COMPARISON OF THE INFLUENCE OF HUNGER AND THIRST ON RAT'S FORAGINGBEHAVIOUR IN A HOSTILE ENVIRONMENT CABANAC, M. Laboratoire de Physiologie, Facult~ de M~dicine, Universit~ Laval, Quebec, P.Q., Canada GIK 7P4 Rats were trained to eat 2 h per day, the food offered was placed at 16 mm from a warm refuge and the ambient temperature was -15 ° C. They were fasted for O, 12, 33, 46, 70 and 94 h r e s p e c t i v e l y p r i o r to the six feeding sessions. Speed of eating and meal duration were not influenced by food deprivation. Amount eaten, number of meals, time spent at the restaurant, speed of running to the feeder and number of foraging rats increased from 0 h fast to 22 h then reached a plateau f o r the 46, 70 and 94 h f a s t s . The same experiment was carried a f t e r water deprivation f o r O, 12, 22, 46 and 70 h. Rats could f i n d water at -15 ° C and at 16 m from t h e i r warm refuge. Speed of running to water and rate of drinking were not influenced by water dep r i v a t i o n . Amount drunk, drinking bout duration, number of drinking bouts, total drinking time and number of drinking rats increased monotoneously from 0 h to 70 h d e p r i v a t i o n . Two main conclusions are drawn from these data: I) in the r a t , up to 70 h d e p r i v a t i o n , the motivation to eat seems to be stronger than the motivation to d r i n k ; 2) to s a t i s f y hunger or t h i r s t , elements of behaviour.
the nervous system uses d i f f e r e n t motor