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A stochastic population model of mid-continental mallards

By:
, , , ,
Edited by:
D.R. McCullough, R.H. Barrett

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Abstract

We developed a simulation model that integrates infonnation on factors affecting the population dynamics of mallards in the mid-continental region of the United States. In the model we vary age, body mass, and reproductive and molt status of simulated females. Females use several types of nesting and foraging habitat in 15 geographic areas. Deterministic and stochastic events cause mortality or attribute changes on a daily basis, depending on current attributes, habitat, area, calendar date, wetland conditions, temperature, and various mortality agents. Because the model encompasses the entire year, it can be used to examine cross-seasonal effects. A simulated increase in nest success from 0.14 to 0.17 changed the annual rate of population growth from -6% to -1 %. A simulated 75% reduction in lead poisoning changed the rate from -6% to -3%.

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
A stochastic population model of mid-continental mallards
Year Published:
1992
Language:
English
Publisher:
Elsevier Applied Science
Publisher location:
New York, New York
Contributing office(s):
Patuxent Wildlife Research Center
Description:
xv, 1163
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
Larger Work Title:
Wildlife 2001: Populations
First page:
170
Last page:
181