A New Approach for Analyzing Bird Densities from Variable Circular-Plot Counts
A New Approach for Analyzing Bird Densities from Variable Circular-Plot Counts
Files
Date
1997-01
Authors
Fancy, Steven G.
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
University of Hawaii Press
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
An approach for calculating bird densities from variable circular-plot
counts is described. The approach differs from previous methods in that data from
several surveys are pooled and detection distances are adjusted as if all distances
were recorded by a single observer under a given set offield conditions. Adjustments
for covariates that affect detection distances such as observer, weather, time of
day, and vegetation type are made using coefficients calculated by multiple linear
regression. The effective area surveyed under standard conditions is calculated from
the pooled data set and then used to determine the effective area surveyed at each
sampling station under the actual conditions when the station was sampled. The
method was validated in two field studies where the density of birds could be
determined by independent methods. Computer software for entering and analyzing
data by this method is described.
Description
Keywords
Citation
Fancy SG. 1997. A new approach for analyzing bird densities from variable circular-plot counts. Pac Sci 51(1): 107-114.
Extent
Format
Geographic Location
Time Period
Related To
Table of Contents
Rights
Rights Holder
Local Contexts
Collections
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.