La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Environmental and economic factors determine the number of feral goats commercially harvested in Western Australia
Auteurs :	David M. Forsyth, Auteur ; John P. Parkes, Auteur ; Andrew P. Woolnough, Auteur ; Greg Pickles, Auteur ; Marnie Collins, Auteur ; Ian Gordon, Auteur
Type de document :	Article
Dans :	Journal of Applied Ecology (46(1) FEB 2009)
Article en page(s) :	101-109
Langues:	Anglais
Résumé :	Many species of wildlife are harvested for sale but there are few time-series analyses of the factors determining the number of animals harvested. Economic theory predicts that price paid per animal is likely to be an important determinant of the harvest, but prices paid for alternative activities could reduce the harvest, and environmental factors such as rainfall could either constrain or enhance the harvest. About 1 million feral goats Capra hircus L. are commercially harvested annually in the semi-arid rangelands of Australia, and there is much interest in how the harvest can be maximized so that the environmental impacts of the goats are minimized. We developed 27 candidate models to explain monthly variation in the numbers of feral goats commercially harvested in Western Australia during July 1988 to June 2003. We fitted linear AR(1) models to the first 89 months of data and used Akaike's Information Criterion corrected for small sample size to identify the model(s) with substantial support. We then evaluated how much variation in the latter

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