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1	Intraspecific cache pilferage in larder-hoarding red squirrels (Tamiasciurus hudsonicus) in Kluane, Yukon Donald, Jenna Unknown Date No description available. Pilferage Red squirrel larder-hoarding kleptoparasitism Stealing
2	Intraspecific cache pilferage in larder-hoarding red squirrels (Tamiasciurus hudsonicus) in Kluane, Yukon Donald, Jenna 11 1900 (has links) Pilfering is thought to play a role in the evolution of scatter-hoarding strategies; but is not well understood in larder-hoarding animals. I studied intraspecific pilfering in red squirrels in Kluane, YT, Canada. The purpose of this project was to estimate the natural rate of cache pilferage, and to examine variation in pilfering behaviour. Results from experimental removal of territory owners, suggested that younger squirrels with smaller food caches were more likely to pilfer when given the opportunity. Survival over-winter was dependent on the number of cones cached and pilfering squirrels were less likely to survive. Using a mark-recapture study of marked cones I found that few individuals (14%) did any pilfering and stolen cones represented only 0.3% of total cones cached. It is clear that pilfering occurs at a much lower rate in Kluane than reported for red squirrels in other regions, and is less than rates reported for scatter-hoarding species. / Ecology Pilferage Red squirrel larder-hoarding kleptoparasitism Stealing
3	The ecology of Arctic cod (Boreogadus saida) and interactions with seabirds, seals, and whales in the Canadian Arctic Matley, Jordan January 2012 (has links) This thesis investigates the foraging of Arctic cod (Boreogadus saida) and its predators during the summer in the Canadian Arctic. Findings included the identification of Arctic cod, ringed seal (Pusa hispida), beluga (Delphinapterus leucas), and narwhal (Monodon monoceros) diet shifts in response to seasonal prey availability; calculation of isotopic diet-tissue discrimination factors for Arctic cod, ringed seals, and whales based on local tissue and stomach content sampling; and determination of predatory cues to optimize foraging, such as the presence of schools. Additionally, I quantified seabird feeding and interspecific interactions such kleptoparasitism and found that black-legged kittiwakes (Rissa tridactyla) and northern fulmars (Fulmarus glacialis) captured cod directly but lost many to parasitic jaegers (Stercorarius parasiticus) and glaucous gulls (Larus hyperboreus). Finally, I determined that schools of cod were important prey sources for northern fulmars, glaucous gulls, and whales however non-schooling cod were a significant source for black-legged kittiwakes and ringed seals. foraging diet stable isotopes school predator food web migration kleptoparasitism niche diet-tissue discrimination factor northern fulmar black-legged kittiwake glaucous gull parasitic jaeger ringed seal narwhal beluga
4	The ecology of Arctic cod (Boreogadus saida) and interactions with seabirds, seals, and whales in the Canadian Arctic Matley, Jordan January 2012 (has links) This thesis investigates the foraging of Arctic cod (Boreogadus saida) and its predators during the summer in the Canadian Arctic. Findings included the identification of Arctic cod, ringed seal (Pusa hispida), beluga (Delphinapterus leucas), and narwhal (Monodon monoceros) diet shifts in response to seasonal prey availability; calculation of isotopic diet-tissue discrimination factors for Arctic cod, ringed seals, and whales based on local tissue and stomach content sampling; and determination of predatory cues to optimize foraging, such as the presence of schools. Additionally, I quantified seabird feeding and interspecific interactions such kleptoparasitism and found that black-legged kittiwakes (Rissa tridactyla) and northern fulmars (Fulmarus glacialis) captured cod directly but lost many to parasitic jaegers (Stercorarius parasiticus) and glaucous gulls (Larus hyperboreus). Finally, I determined that schools of cod were important prey sources for northern fulmars, glaucous gulls, and whales however non-schooling cod were a significant source for black-legged kittiwakes and ringed seals. foraging diet stable isotopes school predator food web migration kleptoparasitism niche diet-tissue discrimination factor northern fulmar black-legged kittiwake glaucous gull parasitic jaeger ringed seal narwhal beluga

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