POP-II is menu-driven and easy to use. It is a straightforward,
"bookkeeping" approach to population dynamics that keeps track of the animals
through one or more biological years.
The biological year begins with birth pulse and
incorporates the following annual factors:
The user enters, edits, and prints all input data,
runs the model for a period up to 50 years, and then reviews a variety
of tabular and graphical depictions
of the resulting population. Typically, the user calibrates the model to
observed population data by comparing the simulation's output against the
observed data, using a set of criteria designed to measure the "goodness-of-fit"
between the two. A step-by-step "Simulation Details Report" of internal
calculations may also be reviewed if the user needs to open up the inner
workings of the simulation model.
pre- and post-harvest season natural mortality with
summer and winter severity indices,
harvest and wounding loss mortality with hunter selectivity
and age-class vulnerability, and
age-specific reproductive rates.
The extensive documentation,
(300 KB; requires Adobe Acrobat Reader,
available free of charge from
provided with POP-II covers all aspects of
population simulation, including the following information:
input data requirements,
details of the simulation's logic,
of input and output,
to POP-II's modeling literature, and
of applied modeling with imprecise data.