The impact of bio-logging on body weight change of the Eurasian beaver.

Bio-logging is a common method to collect ecological data on wild animals, but might also induce stress, reduce body condition, and alter behavior. Eurasian beavers (Castor fiber) are a semi-aquatic and nocturnal species that are challenging to observe in the wild. Bio-loggers are hence useful tools to study their behaviour and movements, but this raises concerns of potential negative impacts of tagging.

Spatial and temporal variability in summer diet of gray wolves () in the Greater Yellowstone Ecosystem.

The role of predation by large carnivores in suppressing prey populations and structuring ecosystems is highly debated, calling for a detailed understanding of carnivore diets. Wolves () roam across three continents and persist throughout widely different ecosystems. Their diet is flexible and may vary spatially as well as seasonally, which requires analysis of diet on different spatial and temporal scales.

Bears and berries: species-specific selective foraging on a patchily distributed food resource in a human-altered landscape.

Abstract: When animals are faced with extraordinary energy-consuming events, like hibernation, finding abundant, energy-rich food resources becomes particularly important. The profitability of food resources can vary spatially, depending on occurrence, quality, and local abundance. Here, we used the brown bear () as a model species to quantify selective foraging on berries in different habitats during hyperphagia in autumn prior to hibernation.