Different mechanisms for social transmission of diet preference in rat pups of different ages.
We examined the role of simple exposure to a diet in the development of preference for that diet in rat pups 21, 28, 38, and 45 days of age. We found: that 21-day-old rat pups exhibited a preference for a diet to which they were simply exposed for 30 min; that 28-, 38-, and 45-day-old pups failed to exhibit simple-exposure induced preference for a diet; and that pups at all ages examined, exposed for 30 min to an anesthetized conspecific whose face had been dusted with a diet, subsequently exhibited a preference for that diet. We interpreted these data as indicating that socially-induced diet preference in 21-day-old pups can be explained by effects of simple exposure, while socially-induced diet preference in older rats cannot. Pups older than 21 days of age appear more sensitive to the social context in which diet-identifying olfactory cues are experienced than do 21-day-old pups.
D000367:Age Factors; D000818:Animals; D003463:Cues; D004032:Diet; D005518:Food Preferences; D009812:Odorants; D051381:Rats; D011919:Rats, Inbred Strains; D012931:Social Environment