Abstract

Summary Dietary requirements of Southern Plains wood rats ih'cotoma micropus nticropus, Baird) were studied by Richter's self-selection of diet method. Nine of 16 adult wood rats fed an array of four purified or semipurified foodstuffs plus water slowly adjusted to the dietary arrangement and thrived thereafter. The other wood rats exhibited nonspecific rejection for all items until death. Subsequently, foodstuffs from the array were mixed in quantities proportional to the mean daily intake of each by the successful selectors during the final portion of the self-selection period. Successful selectors and an equal number of experimentally naive wood rats were fed the mash for nine weeks. Neither group differed significantly in weight at the end of the period from a control group fed a commercial chow

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