BRN 9-3 - Flipbook - Page 17
Figures 1 (right) and 4
(bottom right) are from the
study and indicate that the
distinction between the
Òtravel habitsÓ of the
clades seems to be
worldwide and common to
the clade (feline or canine).
The authors note that
ÒDrawing on a dataset of
1,239 carnivore GPS tracks,
representing 16 canid and
18 felid species across six
continents, we found that
on average, canid home
ranges feature substantially
greater densities of reused
travel routeways (quantiÞed as probability
ridges, Figs. 1 and 3 [see
study]) compared to felid
home ranges. Moreover,
canids used these routeways more extensively
than did felids, as quantiÞed by the greater ridgeassociated probability
mass in their home ranges
(SI Appendix, Figs. S5ÐS7).
These results, which control
for variation in home range
size, contrasting hunting
strategies and landscape
characteristics, as well as
variation in the quantity and
quality of movement track
data, identify striking
differences in carnivoresÕ
space use with regard to
reliance on reused travel
routeways and the resulting
internal heterogeneity of
their home ranges. The
magnitude and consistency
of these differences are
remarkable given the
diverse challenges of
collecting and working with
Þeld data across so many
different species and
landscapes.Ó
Sugar
In the hills of Tennessee,
where I was born, ÒsugarÓ
meant diabetes, as in Òhe
has sugarÓ. The what and
why of diabetes was always
an issue of concern.
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