Abstract
After preliminary studies on flavor acceptability, patterns and indices of subsequent feeding behavior were monitored by computer in young rats which were adapted to 15% or 70% casein diets before being offered, sequentially, choices between flavored diet pairs in which the proportions of percentage casein were 5 65, 5 55, 5 45, 5 35 and 5 25. Similarly adapted rats received these choices in the reverse sequence. Rats adapted to 15% casein usually ate randomly from the diet pairs and selected approximately 15-30% casein; individual behaviors were prominent. The 70% casein groups avoided the higher casein diet, often within minutes (except for the first-offered 5 25 choice), and seldom selected more than 10% casein; individual differences were infrequent. Such rats also distinguished between flavored 70% and 65% casein diets. Sizes and numbers of meals and rates of eating differed for the paired diets, especially for rats adapted to 70% casein. A flavor added to the 70% casein adaptation diet was not avoided when present only in the 5% casein diet of a 5 65 choice. Rats adapted to 70% soy protein before receiving flavored 5 65 to 5 25 choices selected 20-28% soy protein, a level far above those of casein selections by rats adapted to 70% casein. Dietary adaptation and type of protein thus affect subsequent diet selection and feeding patterns and indices.
Original language | English (US) |
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Pages (from-to) | 699-712 |
Number of pages | 14 |
Journal | Physiology and Behavior |
Volume | 51 |
Issue number | 4 |
DOIs | |
State | Published - Apr 1992 |
Keywords
- Adaptation
- Behavior
- Diet
- Food choice
- Food intake
- Growth
- Protein selection
- Protein source
ASJC Scopus subject areas
- Experimental and Cognitive Psychology
- Behavioral Neuroscience