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Graf, R.
and D.C. Heard. 1990. Spreadsheet models for the Beverly and
Kaminuriak herds, NWT. 26 pp.
ABSTRACT
A
spreadsheet model for the Beverly and Kaminuriak barren ground caribou
herds was prepared in order to determine whether or not there was a
harvestable surplus beyond current domestic use which could be used
commercially.
This evaluation involved using the model with several caribou
population experts at a modeling workshop in November 1985 in Edmonton,
plus further modeling and analysis later in Yellowknife.
The models main assumptions are that hunting and natural
mortality are totally additive, that immigration is equal to emigration,
that no parameters are density-dependent and that calf survival and
adult mortality rates are constant within each simulation trial of ten
years.
In order to do our best to relate the model to our actual field
data-gathering techniques, we linked all of the mortality parameters
through two formulae which relate directly to ratios we collect in the
field.
Based on conservative survival and reproductive estimates, we
concluded from the model’s predictions that both herds may be used
beyond what is currently being harvested.
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