Des arlequins plongeurs ont été marqués, sur une période de 12 ans, au moyen de bagues individuellement numérotées. Chaque année, de nouveaux oiseaux étaient marqués et d’autres individus capturés une nouvelle fois. Le relevé temporel des observations de ces individus marqués permet d’estimer des paramètres importants tels que l’abondance, les taux de survie et de […]

Harlequin Ducks were marked with individually numbered tags over a 12 year period. In each year, new birds were marked and some of the older birds were resighted. Based on the pattern of when these marks are seen, important parameters such as the abundance, survival rates, and migration rates of the ducks can be estimated. […]

Extracting coal through surface mining can damage natural habitats because it removes and fragments forests, grasslands, and shrub lands. Coal mines near Hinton, Alberta, our study area, have been reclaimed to reduce the negative effects of mining on the environment and on wildlife as per regulations in the Alberta Environmental Protection and Enhancement Act. Our […]