Author Archives: Nathan Lyle

The Panhandle region placed 172 GPS radio-collars on 6-month old elk calves in the Coeur d’Alene and St. Joe River drainages since 2015. A couple reasons we collared so many elk was to determine survival rates and for those elk … read more

The status and trend of the northern Yellowstone elk herd has been an enduring conservation issue throughout the history of Yellowstone National Park. It is the largest of about seven migratory elk herds that graze the park’s high-elevation meadows during … read more

Winter nutritional restriction of moose and other northern ungulates may be physiologically assessed by serial collection and chemical analysis of fresh urine in snow (snow-urine). Controlled studies of captive ungulate species have demonstrated that urinary urea nitrogen:creatinine (UN:C) ratios have … read more

In Nature Alberta Fall 2016, we wrote an open letter to Premier Notley (Proulx et al. 2016), where we requested that the Alberta Government refrain from predator control and fencing caribou for recovering the Little Smoky caribou population. In addition, … read more

Beavers (Castor canadensis) can be a significant prey item for wolves (Canis lupus) in boreal ecosystems due to their abundance and vulnerability on land. How wolves hunt beavers in these systems is largely unknown, however, because observing predation is challenging. … read more

Prey switching occurs when a generalist predator kills disproportionately more of an abundant prey species and correspondingly spares a rarer species. Although this behaviour is a classic stabilizing mechanism in food web models, little is known about its operation in … read more