Vigorous intake of oil emulsion caused by chronic food deprivation remains after recovery in rats

F. Kimura, Y. Endo, K. Fujimoto

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)


    Oil emulsion intake over a 30-min period was compared under different dietary conditions (ad libitum feeding and chronic food deprivation) and at various concentrations of oil in rats. The pattern of intake for each dietary condition was extremely different. Food-deprived rats ingested more emulsion when the solution was thicker but intake amount became less at too high a concentration. Ad libitum feeding rats ingested less emulsion than deprived rats with no difference among the concentrations. Rats on a restricted diet clearly differentiated between concentrations, selecting the thicker emulsion when provided two-bottle selection between 10% oil and some other concentration. On the other hand, rats fed ad libitum differentiated between only extremely weak solutions. The vigorous intake of oil emulsion induced by chronic food deprivation was maintained after 2 weeks of normal feeding. Significant difference between prior dietary conditions was maintained at lower concentrations. Dietary timing for food-deprived rats affected little on emulsion intake. These results indicate that response to oil emulsion intake differs by concentration in rats.

    Original languageEnglish
    Pages (from-to)107-115
    Number of pages9
    JournalPhysiology and Behavior
    Issue number1
    Publication statusPublished - 2003 Jan


    • Fats
    • Food deprivation
    • Food preference
    • Rats

    ASJC Scopus subject areas

    • Experimental and Cognitive Psychology
    • Behavioral Neuroscience


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