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Effects Of Experimental Malaria Infection On Migration Of Yellow-Rumped Warblers (Setophaga Coronata), Rebecca J. Howe
Effects Of Experimental Malaria Infection On Migration Of Yellow-Rumped Warblers (Setophaga Coronata), Rebecca J. Howe
Electronic Thesis and Dissertation Repository
The potential of migratory animals to spread infectious diseases depends on how infection affects movement. If infection delays or slows the speed of travel, transmission to uninfected individuals may be reduced. Whether and how malaria (Plasmodium spp.) affects bird migration has received little experimental research. I captured 40 actively-migrating Yellow-rumped Warblers (Setophaga coronata) at a migration stopover site and held them in captivity. I inoculated 25 with P. cathemerium while 15 received sham inoculations. After 12 days the birds were released. Six P. cathemerium-inoculated birds (24%) developed P. cathemerium infections after inoculation. I radio-tagged all birds, …
Differential Spring Migration In The White-Throated Sparrow (Zonotrichia Albicollis), Andrew T. Beauchamp
Differential Spring Migration In The White-Throated Sparrow (Zonotrichia Albicollis), Andrew T. Beauchamp
Electronic Thesis and Dissertation Repository
Differential migration timing between distinct classes of individuals is commonly observed in songbirds, however, the underlying behavioural mechanisms of differential timing are still uncertain for most species. My research applied a suite of advanced techniques to examine differential migration timing (by sex and morph) and its underlying behavioural mechanisms (refuelling rate, stopover duration, and wintering latitude) in spring migrating White-throated Sparrows (Zonotrichia albicollis) at a key stopover site. Protandry was the only form of differential migration timing observed, with males arriving at stopover on average 11 days earlier than females. Males and females had similar refuelling rate, stopover …
Environmental Factors Influencing Spring Migration Chronology Of Lesser Scaup (Aythya Affinis), Taylor A. Finger
Environmental Factors Influencing Spring Migration Chronology Of Lesser Scaup (Aythya Affinis), Taylor A. Finger
Electronic Thesis and Dissertation Repository
Weather likely affects the timing and rate of migration by waterfowl to their breeding grounds. I hypothesized that timing of migration by lesser scaup during spring is affected by annual variation in temperature, precipitation and ice cover. I used satellite telemetry data, waterfowl survey data and corresponding weather data to evaluate competing models that explained variation in timing and rate of migration by lesser scaup. Timing of spring migration occurred earlier and faster when lesser scaup encountered warmer temperatures and greater precipitation, both of which are known to influence thermoregulation and habitat availability for waterfowl. Migration chronology of lesser scaup …