Evaluation of ptarmigan management with a population reconstruction model

Erla Sturludottir*, Olafur K. Nielsen, Gunnar Stefansson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The rock ptarmigan (Lagopus muta) is a popular game bird in Iceland, but the population has endured a long-term decline. A hunting ban was enforced in 2003, but 2 years later hunting was allowed again with added restrictions. The aim of this study was to investigate the effects of a change in hunting regulations on the ptarmigan population in northeast Iceland, 1998–2013, using a population reconstruction model and to estimate the abundance of juveniles and adults, natural survival, and harvest mortality. The estimated abundance at the beginning of the hunting season ranged from 42,000 (95% CI = 36,000–49,000) birds in 2002 to 158,000 (95% CI = 105,000–250,000) in 1998. The natural survival of adult rock ptarmigan was density dependent and ranged from 36% to 65% (95% CI = 30–75%). Survival for juveniles was constant and was estimated to be 19% (95% CI = 18–20%). We included a change point in the model to account for a change in the harvest mortality that could have occurred with the changes in the hunting regulations. The results indicated that the change in hunting regulations did reduce ptarmigan harvest mortality and changed the harvest strategies of hunters. Inclusion of a change point in models is useful for managers to test if a change in regulations had an effect on the target population.

Original languageEnglish
Pages (from-to)958-965
Number of pages8
JournalJournal of Wildlife Management
Volume82
Issue number5
DOIs
Publication statusPublished - Jul 2018

Bibliographical note

Publisher Copyright:
© The Wildlife Society, 2018

Other keywords

  • age-at-harvest
  • change point
  • harvest mortality
  • Iceland
  • Lagopus muta
  • ptarmigan
  • statistical population reconstruction model

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