Evaluation of ptarmigan management with a population reconstruction model
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 chang...
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crwiley:10.1002/jwmg.21458 2024-09-15T18:13:32+00:00 Evaluation of ptarmigan management with a population reconstruction model Sturludottir, Erla Nielsen, Olafur K. Stefansson, Gunnar Research Fund for Graduate Students The Icelandic Hunting Card Fund 2018 http://dx.doi.org/10.1002/jwmg.21458 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjwmg.21458 https://onlinelibrary.wiley.com/doi/full/10.1002/jwmg.21458 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor The Journal of Wildlife Management volume 82, issue 5, page 958-965 ISSN 0022-541X 1937-2817 journal-article 2018 crwiley https://doi.org/10.1002/jwmg.21458 2024-07-25T04:22:38Z 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. © 2018 The Wildlife Society. Article in Journal/Newspaper Iceland Lagopus muta rock ptarmigan Wiley Online Library The Journal of Wildlife Management 82 5 958 965 |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
description |
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. © 2018 The Wildlife Society. |
author2 |
Research Fund for Graduate Students The Icelandic Hunting Card Fund |
format |
Article in Journal/Newspaper |
author |
Sturludottir, Erla Nielsen, Olafur K. Stefansson, Gunnar |
spellingShingle |
Sturludottir, Erla Nielsen, Olafur K. Stefansson, Gunnar Evaluation of ptarmigan management with a population reconstruction model |
author_facet |
Sturludottir, Erla Nielsen, Olafur K. Stefansson, Gunnar |
author_sort |
Sturludottir, Erla |
title |
Evaluation of ptarmigan management with a population reconstruction model |
title_short |
Evaluation of ptarmigan management with a population reconstruction model |
title_full |
Evaluation of ptarmigan management with a population reconstruction model |
title_fullStr |
Evaluation of ptarmigan management with a population reconstruction model |
title_full_unstemmed |
Evaluation of ptarmigan management with a population reconstruction model |
title_sort |
evaluation of ptarmigan management with a population reconstruction model |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/jwmg.21458 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjwmg.21458 https://onlinelibrary.wiley.com/doi/full/10.1002/jwmg.21458 |
genre |
Iceland Lagopus muta rock ptarmigan |
genre_facet |
Iceland Lagopus muta rock ptarmigan |
op_source |
The Journal of Wildlife Management volume 82, issue 5, page 958-965 ISSN 0022-541X 1937-2817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jwmg.21458 |
container_title |
The Journal of Wildlife Management |
container_volume |
82 |
container_issue |
5 |
container_start_page |
958 |
op_container_end_page |
965 |
_version_ |
1810451305189081088 |