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Areas occupied by white-tailed prairie dogs (WTPD; Cynomys leucurus) and Gunnison's prairie dogs (GPD; C. gunnisoni) are not well-known in Colorado (USA) and elsewhere. Suitable methodology for monitoring changes in populations of WTPD and GPD over broad areas also has not been well established. We evaluated occupancy modeling methodology to establish baseline occupancy rates for WTPD and GPD in Colorado. We estimated that WTPD occupied 24.1% (SE = 12.8) of 47,710 0.25-km2 plots and GPD occupied 7.5% (SE = 1.3) of 158,225 0.25-km2 plots in Colorado during 2004 and 2005. Areas reported as colonies in the Colorado Division of Wildlife's database were not good predictors of WTPD and GPD occupancy. Occupancy rates were...
1. 1. Badgers, marmots, white-tailed prairie dogs, black-tailed prairie dogs, Wyoming ground squirrels, thirteen-lined ground squirrels and laboratory rats were monitored for their urea hydrolyzing ability by gut bacterial urease during periods of food availability and food deprivation. 2. 2. There did not appear to be a correlation between an animal's ability to hibernate and to expire 14CO2 from hydrolyzed 14C-urea injected intraperitoneally. 3. 3. In addition, fasting and water deprivation (characteristic of hibernation hypothermic bouts) resulted in a decrease in urea hydrolysis by all species except for the rat. It is speculated that urea hydrolysis may be more directly related to gut bacterial biomass or pH...