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Population Projections from Simple Models
L. L. Eberhardt
Journal of Applied Ecology
Vol. 24, No. 1 (Apr., 1987), pp. 103-118
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/2403790
Page Count: 16
You can always find the topics here!Topics: Population estimates, Seals, Estimation methods, Deer, Statistical estimation, Censuses, Least squares, Ratios, Population size, Elks
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(1) Examples of geometric growth patterns in large-mammal populations are examined, and used to assess a 'ratio' method for estimating growth rate. (2) Simple difference equation models for populations subjected to extensive removals are used to estimate potential rates of growth in the presence of removals, using the ratio method and a minimum chi-square (χ2) fitting procedure. Ten examples demonstrate use of the models and methods of estimating growth rates. (3) Density-dependence is evident in some examples, and complicates fitting and projecting into the future. (4) The approach requires absolute population estimates when removals occur, and is unsatisfactory if there is a substantial unmeasured loss associated with the known removals.
Journal of Applied Ecology © 1987 British Ecological Society