Figure 8
From: Monitoring the wild black bear's reaction to human and environmental stressors
Annual trends in heart rate and activity in free-ranging wild black bears. The average daytime heart rate, nighttime heart rate, and daily activity are plotted (two years are included for bear 3). The error bar indicates one standard deviation. The sample size available for each data point is indicated. Although seasonal changes in heart rate and activity were significant, there was no statistical difference found between the daytime and nighttime heart rate for any one month interval.