Bibliothèque Tour du Valat

Se connecter

Mot de passe oublié ?
Pas encore inscrit ?

La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Détail

Ajouter au panier

Ajouter au panier

Lien vers la notice

Titre :	Is hunting mortality additive or compensatory to natural mortality? Effects of experimental harvest on the survival and cause-specific mortality of willow ptarmigan
Auteurs :	Brett K. Sandercock, Auteur ; Erlend B. Nilsen, Auteur ; Henrik Broseth, Auteur ; Hans C. Pedersen, Auteur
Type de document :	Article
Dans :	Journal of Animal Ecology (80(1) JAN 2011)
Article en page(s) :	244-258
Résumé :	P>1. The effects of harvest on the annual and seasonal survival of willow ptarmigan Lagopus lagopus L. were tested in a large-scale harvest experiment. Management units were randomly assigned to one of three experimental treatments: 0%, 15% or 30% harvest. Seasonal quotas were based on the experimental treatment and estimates of bird density before the hunting season. Survival rates and hazard functions for radio-marked ptarmigan were then estimated under the competing risks of harvest and natural mortality. 2. The partially compensatory mortality hypothesis was supported: annual survival of ptarmigan was 0 center dot 54 +/- 0 center dot 08 SE under 0% harvest, 0 center dot 47 +/- 0 center dot 06 under 15% harvest, and was reduced to 0 center dot 30 +/- 0 center dot 05 under 30% harvest. Harvest mortality increased linearly from 0 center dot 08 +/- 0 center dot 05, 0 center dot 27 +/- 0 center dot 05 and 0 center dot 42 +/- 0 center dot 06 from 0% to 30% harvest, whereas natural mortality was 0 center dot 38 +/- 0 center dot 08, 0 center dot 25 +/- 0 center dot 05 and 0 center dot 28 +/- 0 center dot 06 under the same treatments. 3. Realized risk of harvest mortality was 0 center dot 08-0 center dot

FAQ

Infos pratiques

Heures d'ouverture et contact

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...

Liens utiles

A-
A
A+