Sex Ratio Estimates of Roosevelt Elk Using Counts and Bowden’s Estimator
Date
2011-01
Authors
Weaver, Sara
Weckerly, Floyd W.
Journal Title
Journal ISSN
Volume Title
Publisher
California Fish and Game
Abstract
Adult sex ratios were calculated with count data, and with Bowden's estimator, and results were evaluated for potential bias in a population of Roosevelt elk (Cervus elaphus roosevelti) surveyed from 1997 to 2011. The mean and high count sex ratio estimates were two to eight percent lower, on average, than the Bowden's sex ratio estimates. Bowden's estimator accounts for imperfect detection and is more likely to reliably estimate sex ratios of Roosevelt elk and, potentially, other ungulates.
Description
Keywords
bias, Bowden's estimator, cervus elaphus, count data, imperfect detection, Roosevelt elk, sex ratio, sightability, Biology
Citation
Weaver, S. P., & Weckerly, F. W. (2011). Sex ratio estimates of Roosevelt elk using counts and Bowden’s estimator. California Fish and Game, 97, pp. 130-137.