Adaptation to 23 and one-half-hour food deprivation: a strain comparison.
D000818:Animals; D001522:Behavior, Animal; D003216:Conditioning, Operant; D005247:Feeding Behavior; D005508:Food Deprivation; D008297:Male; D009042:Motivation; D010507:Periodicity; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors