La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Effects of roads on individual caribou movements during migration
Auteurs :	Ryan R. Wilson, Auteur ; Lincoln S. Parrett, Auteur ; Kyle Joly, Auteur ; Jim R. Dau, Auteur
Type de document :	Article
Dans :	Biological Conservation (195 MAR 2016)
Article en page(s) :	2-8
Langues:	Anglais
Résumé :	Long distance migrations by large mammals are increasingly imperiled by human development. We studied autumn migratory patterns of caribou (Rangifer tarandus) in relation to an industrial road in northwestern Alaska. We built null movement models to determine the expected time to cross the road if caribou movements were not affected by the road. We then identified individuals that took longer to cross than expected (slow crossers) and those that did not differ from that expected from the null model (normal crossers). We identified eight as slow and 20 as normal crossers. Slow crossers took an average of 33.3 +/- 17.0 (+/- SD) days to cross the road compared to 3.1 +/- 5.5 days for normal crossers. Slow crossers had an average crossing date of 8 Nov. +/- 7.7 days versus

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