Effort as determinant of intake and patterns of drinking in the guinea pig.
D000818:Animals; D001070:Appetitive Behavior; D001835:Body Weight; D002415:Cats; D003216:Conditioning, Operant; D004326:Drinking; D004327:Drinking Behavior; D004435:Eating; D004463:Ecology; D004777:Environment; D005508:Food Deprivation; D006168:Guinea Pigs / Q000502:physiology*; D008297:Male; D008954:Models, Biological; D051381:Rats; D012055:Reinforcement Schedule; D013045:Species Specificity; D014868:Water Deprivation