Seasonal mortality of black grouse Tetra tetrix during a year with little snow
The seasonal mortality of black grouse Tetrao tetrix was studied in southeastern Norway (60°26′N, 10°54′E), in a study area dominated by up to 80% Norway spruce Picea abies. Modem forestry with clear‐cuttings has been practised, and 50% of the forest was younger than 30 years. Fourteen males and sev...
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crwiley:10.2981/wlb.1997.025 2023-12-03T10:08:16+01:00 Seasonal mortality of black grouse Tetra tetrix during a year with little snow Spids⊘, Tor K. Hjeljord, Olav Dokk, John G. Norges Forskningsråd 1997 http://dx.doi.org/10.2981/wlb.1997.025 https://onlinelibrary.wiley.com/doi/full-xml/10.2981/wlb.1997.025 https://onlinelibrary.wiley.com/doi/pdf/10.2981/wlb.1997.025 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Wildlife Biology volume 3, issue 3-4, page 205-209 ISSN 1903-220X 1903-220X Management, Monitoring, Policy and Law Nature and Landscape Conservation Ecology, Evolution, Behavior and Systematics journal-article 1997 crwiley https://doi.org/10.2981/wlb.1997.025 2023-11-09T14:36:15Z The seasonal mortality of black grouse Tetrao tetrix was studied in southeastern Norway (60°26′N, 10°54′E), in a study area dominated by up to 80% Norway spruce Picea abies. Modem forestry with clear‐cuttings has been practised, and 50% of the forest was younger than 30 years. Fourteen males and seven females were captured on a lek in spring 1991 and equipped with radio transmitters. During the following 12 months, 72% of the birds were killed, mostly by predators. No birds died from capture through July. In autumn, predation was higher, with four black grouse being killed. Mortality was highest during winter, with 58% of the birds dying. The goshawk Accipiter gentilis was the most important predator during winter. High predation by goshawks in winter 1991–92 may have been the result of black grouse being more vulnerable to predation because limited snowfall precluded snow roosting, or of an invasion by goshawks. Therefore, snow roosting may be an important antipredator behaviour in black grouse. The effect of increased adult mortality is discussed in relation to chick production. Article in Journal/Newspaper Accipiter gentilis Wiley Online Library (via Crossref) Norway Wildlife Biology 3 3-4 205 209 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Management, Monitoring, Policy and Law Nature and Landscape Conservation Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Management, Monitoring, Policy and Law Nature and Landscape Conservation Ecology, Evolution, Behavior and Systematics Spids⊘, Tor K. Hjeljord, Olav Dokk, John G. Seasonal mortality of black grouse Tetra tetrix during a year with little snow |
topic_facet |
Management, Monitoring, Policy and Law Nature and Landscape Conservation Ecology, Evolution, Behavior and Systematics |
description |
The seasonal mortality of black grouse Tetrao tetrix was studied in southeastern Norway (60°26′N, 10°54′E), in a study area dominated by up to 80% Norway spruce Picea abies. Modem forestry with clear‐cuttings has been practised, and 50% of the forest was younger than 30 years. Fourteen males and seven females were captured on a lek in spring 1991 and equipped with radio transmitters. During the following 12 months, 72% of the birds were killed, mostly by predators. No birds died from capture through July. In autumn, predation was higher, with four black grouse being killed. Mortality was highest during winter, with 58% of the birds dying. The goshawk Accipiter gentilis was the most important predator during winter. High predation by goshawks in winter 1991–92 may have been the result of black grouse being more vulnerable to predation because limited snowfall precluded snow roosting, or of an invasion by goshawks. Therefore, snow roosting may be an important antipredator behaviour in black grouse. The effect of increased adult mortality is discussed in relation to chick production. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Spids⊘, Tor K. Hjeljord, Olav Dokk, John G. |
author_facet |
Spids⊘, Tor K. Hjeljord, Olav Dokk, John G. |
author_sort |
Spids⊘, Tor K. |
title |
Seasonal mortality of black grouse Tetra tetrix during a year with little snow |
title_short |
Seasonal mortality of black grouse Tetra tetrix during a year with little snow |
title_full |
Seasonal mortality of black grouse Tetra tetrix during a year with little snow |
title_fullStr |
Seasonal mortality of black grouse Tetra tetrix during a year with little snow |
title_full_unstemmed |
Seasonal mortality of black grouse Tetra tetrix during a year with little snow |
title_sort |
seasonal mortality of black grouse tetra tetrix during a year with little snow |
publisher |
Wiley |
publishDate |
1997 |
url |
http://dx.doi.org/10.2981/wlb.1997.025 https://onlinelibrary.wiley.com/doi/full-xml/10.2981/wlb.1997.025 https://onlinelibrary.wiley.com/doi/pdf/10.2981/wlb.1997.025 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Accipiter gentilis |
genre_facet |
Accipiter gentilis |
op_source |
Wildlife Biology volume 3, issue 3-4, page 205-209 ISSN 1903-220X 1903-220X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2981/wlb.1997.025 |
container_title |
Wildlife Biology |
container_volume |
3 |
container_issue |
3-4 |
container_start_page |
205 |
op_container_end_page |
209 |
_version_ |
1784260570827980800 |