Survival of black grouse Tetrao tetrix in the French Alps
International audience Survival rates are necessary for calculating allowable harvests and for modelling population performance. Survival rates for 93 black grouse Tetrao tetrix equipped with radio tags in two populations of the southern French Alps were estimated. Annual survival rates of hens (0.6...
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Online Access: | https://hal.science/hal-04493299 https://hal.science/hal-04493299/document https://hal.science/hal-04493299/file/wlb.1997.022.pdf https://doi.org/10.2981/wlb.1997.022 |
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ftsupagro:oai:HAL:hal-04493299v1 2024-05-19T07:27:20+00:00 Survival of black grouse Tetrao tetrix in the French Alps Caizergues, Alain Ellison, Laurence, N Office National de la Chasse et de la Faune Sauvage (ONCFS) Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) 1997 https://hal.science/hal-04493299 https://hal.science/hal-04493299/document https://hal.science/hal-04493299/file/wlb.1997.022.pdf https://doi.org/10.2981/wlb.1997.022 en eng HAL CCSD Nordic Council for Wildlife Research info:eu-repo/semantics/altIdentifier/doi/10.2981/wlb.1997.022 hal-04493299 https://hal.science/hal-04493299 https://hal.science/hal-04493299/document https://hal.science/hal-04493299/file/wlb.1997.022.pdf doi:10.2981/wlb.1997.022 info:eu-repo/semantics/OpenAccess ISSN: 0909-6396 Wildlife Biology https://hal.science/hal-04493299 Wildlife Biology, 1997, 3 (3-4), pp.177 - 186. ⟨10.2981/wlb.1997.022⟩ black grouse French Alps hunting Kaplan-Meier matrix mod elling radio telemetry survival rates Tetrao tetrix tetrix [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology info:eu-repo/semantics/article Journal articles 1997 ftsupagro https://doi.org/10.2981/wlb.1997.022 2024-04-25T17:06:47Z International audience Survival rates are necessary for calculating allowable harvests and for modelling population performance. Survival rates for 93 black grouse Tetrao tetrix equipped with radio tags in two populations of the southern French Alps were estimated. Annual survival rates of hens (0.68, SE = 0.075, 0.84, SE = 0.105), but not of cocks (0.56, SE = 0.09, 0.66, SE = 0.122), tended to be higher than those of juveniles (0.52, SE = 0.071, sexes combined). The lower survival of juveniles was due to higher predation, mostly by raptors, in autumn and winter. Although both autumn and winter were seasons of peak mortality in juveniles, most adult deaths occurred either in spring (hens and cocks), or in early summer (cocks). Causes of mortality were as follows: raptors 51%, mammalian predators 27%, unidentified predators 11%, and hunting 11%. Principal raptors were golden eagltAquila chrysaetos and goshawk Accipiter gentilis. Mammalian predators included fox Vulpes vulpes, pine marten Maries maries and stone marten M. foina. Only males could be legally shot, and hunting was a minor mortality factor on our study areas. Nevertheless, the distorted adult sex ratio favouring hens that we observed on our study areas was probably due to hunting of males on and around the study areas. Sensitivity analysis showed that population growth is influenced more by adult survival than by either reproductive success or juvenile survival to one year of age. To prevent shooting from causing highly distorted spring sex ratios, which might compromise reproductive success, harvests should be reduced in years of poor reproduction, and shooting should be oriented towards juvenile males. Article in Journal/Newspaper Accipiter gentilis Portail HAL Institut Agro Montpellier Wildlife Biology 3 3-4 177 186 |
institution |
Open Polar |
collection |
Portail HAL Institut Agro Montpellier |
op_collection_id |
ftsupagro |
language |
English |
topic |
black grouse French Alps hunting Kaplan-Meier matrix mod elling radio telemetry survival rates Tetrao tetrix tetrix [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology |
spellingShingle |
black grouse French Alps hunting Kaplan-Meier matrix mod elling radio telemetry survival rates Tetrao tetrix tetrix [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology Caizergues, Alain Ellison, Laurence, N Survival of black grouse Tetrao tetrix in the French Alps |
topic_facet |
black grouse French Alps hunting Kaplan-Meier matrix mod elling radio telemetry survival rates Tetrao tetrix tetrix [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology |
description |
International audience Survival rates are necessary for calculating allowable harvests and for modelling population performance. Survival rates for 93 black grouse Tetrao tetrix equipped with radio tags in two populations of the southern French Alps were estimated. Annual survival rates of hens (0.68, SE = 0.075, 0.84, SE = 0.105), but not of cocks (0.56, SE = 0.09, 0.66, SE = 0.122), tended to be higher than those of juveniles (0.52, SE = 0.071, sexes combined). The lower survival of juveniles was due to higher predation, mostly by raptors, in autumn and winter. Although both autumn and winter were seasons of peak mortality in juveniles, most adult deaths occurred either in spring (hens and cocks), or in early summer (cocks). Causes of mortality were as follows: raptors 51%, mammalian predators 27%, unidentified predators 11%, and hunting 11%. Principal raptors were golden eagltAquila chrysaetos and goshawk Accipiter gentilis. Mammalian predators included fox Vulpes vulpes, pine marten Maries maries and stone marten M. foina. Only males could be legally shot, and hunting was a minor mortality factor on our study areas. Nevertheless, the distorted adult sex ratio favouring hens that we observed on our study areas was probably due to hunting of males on and around the study areas. Sensitivity analysis showed that population growth is influenced more by adult survival than by either reproductive success or juvenile survival to one year of age. To prevent shooting from causing highly distorted spring sex ratios, which might compromise reproductive success, harvests should be reduced in years of poor reproduction, and shooting should be oriented towards juvenile males. |
author2 |
Office National de la Chasse et de la Faune Sauvage (ONCFS) Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) |
format |
Article in Journal/Newspaper |
author |
Caizergues, Alain Ellison, Laurence, N |
author_facet |
Caizergues, Alain Ellison, Laurence, N |
author_sort |
Caizergues, Alain |
title |
Survival of black grouse Tetrao tetrix in the French Alps |
title_short |
Survival of black grouse Tetrao tetrix in the French Alps |
title_full |
Survival of black grouse Tetrao tetrix in the French Alps |
title_fullStr |
Survival of black grouse Tetrao tetrix in the French Alps |
title_full_unstemmed |
Survival of black grouse Tetrao tetrix in the French Alps |
title_sort |
survival of black grouse tetrao tetrix in the french alps |
publisher |
HAL CCSD |
publishDate |
1997 |
url |
https://hal.science/hal-04493299 https://hal.science/hal-04493299/document https://hal.science/hal-04493299/file/wlb.1997.022.pdf https://doi.org/10.2981/wlb.1997.022 |
genre |
Accipiter gentilis |
genre_facet |
Accipiter gentilis |
op_source |
ISSN: 0909-6396 Wildlife Biology https://hal.science/hal-04493299 Wildlife Biology, 1997, 3 (3-4), pp.177 - 186. ⟨10.2981/wlb.1997.022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.2981/wlb.1997.022 hal-04493299 https://hal.science/hal-04493299 https://hal.science/hal-04493299/document https://hal.science/hal-04493299/file/wlb.1997.022.pdf doi:10.2981/wlb.1997.022 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.2981/wlb.1997.022 |
container_title |
Wildlife Biology |
container_volume |
3 |
container_issue |
3-4 |
container_start_page |
177 |
op_container_end_page |
186 |
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1799470686265147392 |