ESTIMATION OF MOOSE PARTURITION DATES IN COLORADO: INCORPORATING IMPERFECT DETECTIONS

Authors

  • Eric J. Bergman Colorado Parks and Wildlife
  • Forest P. Hayes University of Montana
  • Kevin Aagaard Colorado Parks and Wildlife

Keywords:

calf-at-heel, ground surveys, detection probability (p), parturition, recruitment

Abstract

Researchers and managers use productivity surveys to evaluate moose populations for harvest and population management purposes, yet such surveys are prone to bias. We incorporated detection probability estimates (p) into spring and summer ground surveys to reduce the influence of observer bias on the estimation of moose parturition dates in Colorado. In our study, the cumulative parturition probability for moose was 0.50 by May 19, and the probability of parturition exceeded 0.9 by May 27. Timing of moose calf parturition in Colorado appears synchronous with parturition in more northern latitudes. Our results can be used to plan ground surveys in a manner that will reduce bias stemming from unobservable and yet-born calves.

Author Biography

Eric J. Bergman, Colorado Parks and Wildlife

Research Scientist

Downloads

Published

2020-09-22

How to Cite

Bergman, E. J., Hayes, F. P., & Aagaard, K. (2020). ESTIMATION OF MOOSE PARTURITION DATES IN COLORADO: INCORPORATING IMPERFECT DETECTIONS. Alces: A Journal Devoted to the Biology and Management of Moose, 56, 127–135. Retrieved from https://alcesjournal.org/index.php/alces/article/view/277

Issue

Vol. 56 (2020)

Section

Articles

License

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.