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Estimates of avian population trends from the North American Breeding Bird Survey

By:
,
Edited by:
C. John Ralph, J. Michael Scott

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Abstract

One of the major purposes of bird population studies is to document changes in population size over a period of years. The traditional method used in Europe and North America to detect population change is to calculate annual ratios. However, this method can produce spurious results when ratios are accumulated over many years. Consequently, new methods of computing trends are needed. Several new methods of estimating population trends are developed and illustrated with data from the North American Breeding Bird Survey (BBS). Each method is compared in terms of its assumptions, biases, and limitations. On the basis of these comparisons we recommend one method that we feel most accurately detects true population trends. Both the biological and statistical justifications for the model selection are presented. Trends estimated with this model are then presented for two species.

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Estimates of avian population trends from the North American Breeding Bird Survey
Series number:
6
Year Published:
1981
Language:
English
Publisher:
Cooper Ornithological Society
Publisher location:
Lawrence, KS
Contributing office(s):
Patuxent Wildlife Research Center
Description:
x, 630
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
Larger Work Title:
Estimating Numbers of Terrestrial Birds
First page:
42
Last page:
51