A STUDY OF PITUITARY, THYROID AND ADRENAL GLAND RELATIONSHIPS IN GROUND SQUIRRELS (CITELLUS RICHARDSONI) AS INFLUENCED BY DIET AND ATMOSPHERIC PRESSURE.
COLORADO STATE UNIV FORT COLLINS RESEARCH FOUNDATION
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The objectives of the research were a to study the dietary changes occurring in ground squirrels prior to their entrance into hibernation b to determine if a correlation exists between dietary changes and functional activity of the pituitary, thyroid and adrenal cortex, and c to study the time relationship of changes in functional activity of these glands. The work accomplished under this contract involved three phases and the results are presented separately for each phase. Phase One consisted of a field investigation of the squirrels under natural conditions near Tie Siding, Wyoming. Phase Two consisted of laboratory studies of circulating pituitary ACTH, TSH and thyroid hormones. Phase Three consisted of a laboratory experiment designed to test the efficacy of various diets upon activity patterns, weight gains, endocrine activity, and the hibernating ability of the squirrels.