Abstract
-Rock squirrels (Spermophilus variegatus) were studied from July 1983 to June 1987 in an oak (Quercus sp.) savanna in southeastern Arizona. Adults were relatively inactive from late October through February. In the autumn, adult males generally were significantly less active (and immerged earlier) than females. Juveniles first appeared aboveground in July, and they were active throughout the autumn. Annual activity patterns of juvenile males and females did not differ. While adult males were significantly heavier than females in late May and early June, the middle of the mating season, there were no significant differences in mean weights between adult males and females during any other half-month period. Juvenile males and females emerged aboveground at similar weights and, thereafter, had similar rates of postemergent weight gain.
Published Version
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