Distribution of caribou and wolves in relation to linear corridors

Article Abstract:

The general trend within caribou populations is towards avoiding linear corridors, according to research testing the view that linear corridors influence the distribution of caribou and their vulnerability to predation or harvest. This research was undertaken in northeastern Alberta, Canada. There was found to be substantial individual variation in caribou distribution in relation to linear corridors. Overall, caribou mortalities seemed to be randomly distributed with regard to linear corridors. However, it appears that individual caribou that occupy habitat close to linear corridors are at higher risk of predation than caribou living further from corridors.

Caribou, Animal migration

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Variance component analysis and heritability of antler traits in white-tailed deer

Article Abstract:

Deer harvest management programs need more information on the contribution of genetics to trophy antler production. Direct selection is currently used to manipulate antler development on the understanding that genetics plays a crucial role. A new study collects data on antler traits in white-tailed deer and, using an animal model, a variance estimate procedure of components is developed. It is suggested that maternal effects are generally more important than other genetic factors in controlling expression of antler traits.

Genetic aspects, Wildlife management, White-tailed deer, Antlers

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Antler loss and udder distention in relation to parturition in caribou

Article Abstract:

Antler retention and udder distention in radio-monitored females belonging to the Porcupine Caribou herd in Alaska and Yukon Territory were investigated to determine their reliability as an indicator of parturition. The results supported the widely held belief that the two factors, together with the presence of a calf at heel, leads to an accurate determination of parturition. They also revealed that 99% of the cows which grew hard antlers at the start of the calving season became parturient.

Parturition, Parturition (Animals)

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