Keith A. Hobson

TL;DR: The results suggest that cannibalism may occur as a result of competition rather than the specific quality of available diets, unless such diets lead to starvation.

TL;DR: Levels of polychlorinated dibenzo‐p‐dioxins and PCDFs were determined in common murre, Brandt's cormorant, rhinoceros auklet, and pigeon guillemot eggs, and Steller sea lion blubber collected from the Gulf of the Farallones National Marine Sanctuary in 1993.

TL;DR: Range of d 2 Hhair values varied substantially among hibernacula, suggesting large differences among sites in the north-south distance travelled by bats between summer and winter habitats.

TL;DR: Isotopic variance in winter-grown feathers of two breeding populations of wrynecks and their geographical assignment point to defined, albeit overlapping, wintering areas, suggesting both leapfrog migration and low migratory connectivity.

TL;DR: Variability among Mallards from one small wetland complex in prairie Canada was best explained by variability in &dgr;Dp values that represented the period of feather synthesis through the beginning of the previous growing season >12 months earlier, which may help explain why assigning origins of wetland birds on the basis of deuterium levels can be more uncertain at finer spatial scales.