Figure 2.
Relationships between climate
variables (a mean spring temperature (oC); b mean
spring snowpack (cm)) and pup emergence date. (number of females = 192;
number of litters = 461).
Heritability of pup emergence date was low, approximately 8%, and not
significantly different from zero (Table 3). We also report significant
inter-annual and inter-individual variation in the date of pup emergence
(Table 3).
Table 3. Variance components and
ratios for colony, year, additive genetic, and permanent environment
from the univariate animal model analyzing the association of changing
average spring snowpack and temperature with pup emergence date. (number
of females = 184; number of litters = 425).