Quantifying the Strength of Frugivory through Time
While other studies have used activity budgets to quantify the strength
of frugivory (Pavelka and Knopff 2004), we directly measured the
proportion of total fecal volume comprised of fruit. This measure was
used as the response variable in all subsequent analyses on frugivory.
As our predictor variables, we used indices of time in the form of
calendar days to cover the whole calendar year and in a separate
analysis, we used an interaction term between the season in which the
sample was collected with the number of days elapsed within that season.