Wolf Reproduction in Response to Caribou Migration and Industrial Development on the Central Barrens of Mainland Canada

Reproductive success of mammals is greatly influenced by food availability. Where wolves (Canis lupus) prey on migratory barren-ground caribou (Rangifer tarandus), caribou migration patterns strongly influence food availability for wolves. However, industrial development in formerly undeveloped wolf...

Full description

Bibliographic Details
Published in:ARCTIC
Main Authors: Frame, Paul F., Cluff, H. Dean, Hik, David S.
Format: Article in Journal/Newspaper
Language:English
Published: The Arctic Institute of North America 2009
Subjects:
Online Access:https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63088
Description
Summary:Reproductive success of mammals is greatly influenced by food availability. Where wolves (Canis lupus) prey on migratory barren-ground caribou (Rangifer tarandus), caribou migration patterns strongly influence food availability for wolves. However, industrial development in formerly undeveloped wolf range could also negatively influence wolf reproduction, either directly (by disrupting normal feeding behavior) or indirectly (by impacting caribou migrations). We used a cross-sectional timeseries regression to analyze eight years of wolf reproductive data with respect to spatial and temporal variation in caribou migration and economic development in a 49 900 km2 area of the Northwest Territories, Canada. Reproductive success decreased as the distance from wolf dens to caribou migration routes increased, while the timing of caribou migrations had little effect. There was no measurable effect of current levels of economic development on reproductive success, although evidence suggests the potential for indirect effects. Continued monitoring is required to identify possible thresholds of adverse effects for wolf populations. La réussite de reproduction des mammifères dépend beaucoup de la disponibilité de la nourriture. Là où les loups (Canis lupus) ont comme proie le caribou de la toundra en migration (Rangifer tarandus), le schéma des migrations du caribou joue un grand rôle sur la disponibilité de nourriture des loups. Cela dit, l’expansion industrielle dans d’anciennes aires de répartition non aménagées du loup pourrait aussi avoir une influence négative sur la reproduction du loup, directement (perturbation du comportement d’alimentation habituel) ou indirectement (impact sur la migration du caribou). Nous avons recouru à une régression chronologique transversale pour analyser huit années de données de reproduction du loup par rapport à la variation spatiale et temporelle de la migration du caribou et au développement économique dans une zone de 49 900 km2 des territoires du Nord-Ouest, au Canada. La réussite ...