The effect of suburban and agricultural development on the activity patterns of coyotes (Canis latrans)

We compared the activity patterns of coyotes (Canis latrans) in a suburban/ agricultural area to those in an adjacent undeveloped area in northwest Wyo ming from August 1998 to August 1999. Activity patter ns were recorded usin g variable-pulse radio-collars. Correlation of recorded activity and observ ed activity indicated differences in the sensitivity of the collars. The me an percent of active signals for coyotes in the suburban/agricultural area was significantly lower during diurnal periods and significantly higher dur ing nocturnal periods than the mean percent of active signals in those peri ods for coyotes in the undeveloped area. No differences bet een the two are as were observed during crepuscular rimes. Environmental stimuli, such as h uman activity, increased the amplitude of the circadian rhythms of coyotes. This increase in amplitude is a result of increased nocturnal activity and decreased diurnal activity.