Fig. 2
Density plots of (a) traverse angles in relation to topographical slope angle and (b) speed in relation to path angle and speed in relation to path angle. Positive path angles signify pumas walking on inclines. Negative path angles signify pumas walking on declines. The dashed line indicates level walking (0°). Colour scales represents the density of points (yellow = high density, blue = low density according to the ‘Count’ scale). (c): Density plot for topographical slope angle of the terrain in relation to path angle (selected incline by pumas). Least square regression lines are shown separately for incline and decline data (based on Eqs. 6 and 7). For incline data, the solid line A represents mean topographical slope angle and mean path angle. Dashed line B and dotted line C represent an extrapolation from the incline regression using a mean 10o or 20o increase in the topographical slope angle. The mean path angle would increase to 10.4o and 13.5o respectively. The colour represents density of points as described above