All parameters in the model are defined at the annual rate, so that difference
equation models on a 1 year time step could be used for comparison; the 365th
root of the calculated survival was used to model daily survival proportions
while the birth rate was applied on the species-specific birthing day annually.
Density dependent parameters were chosen to produce the general pattern of
maximum productivity at 70-75% of equilibrium, and the greatest magnitude
of changes in juvenile survival, birth rates and adult survival, in that
order. All the parameters, and prey populations used in the model are user-controlled,
and developed in an interactive spreadsheet (PreyWorksheets.xls). A sample
showing survival rates and population curves are shown below.