influence du climat et de la prédation sur l'utilisation de l'habitat et la ...

XlI
Figure 3.4 Causes of mortality for dead juveniles (in white, n = 9) and individuals
2:1-yr-old (in black, n = 37) in North American porcupines, Parc National du Bic,
Québec, May 2000-May 2006. 48
Figure 3.5 Season of mortality for the: a) depredated juveniles (in white, n = 6)
and individuals 2:1-yr-old (in black, n = 22), and b) starved juveniles (in white, n =2)
and individuals 2:1-yr-old (in black, n = Il), in North American porcupines, Parc
National du Bic, Québec, May 2000-May 2006. Seasons were defined as: summer
(from May to August), winter but no snow (from September to approximately mid-
November), and winter with snow covering the ground (approximately from mid-
November to end of April). 49
Chapitre 4
Figure 4.1 Mean daily air temperature (oC) measured outside (black solid line)
and inside (grey solid hne) ni ne porcupine dens, Parc National du Bic, Québec,
15 December 2004-14 April 2005. Black dashed line indicates the mean outside
tempe rature (-2A°C) above which temperature inside the den became lower than
outside temperature.
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Figure 4.2 Power consumed by porcupine mounts exposed to available conditions
of operative temperature and placed in non-den microhabitats, Parc National du Bic,
Québec, December to March, 2004-2005. Means for non-den microhabitats are shown
as a percentage of power consumed in "den" (from Table 4.2). Sample sizes are
specified above the bars as : number of days for which data was obtained, total number
of measurements on those days. a) ln arboreal ("conifer open", "conifer covered" and
"deciduous" pooled, white bars) and terrestrial microhabitats ("ground open" and
"ground covered" pooled, black bars). b) In open ("conifer open", "deciduous" and
"ground open" pooled, white bars) and covered microhabitats ("ground covered"
and "coniferous covered" pooled, black bars).
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