A5074996487- Avian ecology and behavior
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Marine animal studies overview
- Rangeland and Wildlife Management
- Animal Behavior and Reproduction
- Mercury impact and mitigation studies
- Ecology and biodiversity studies
- Genetic diversity and population structure
- melanin and skin pigmentation
- Climate change and permafrost
- Arctic and Antarctic ice dynamics
- Fire effects on ecosystems
- Animal Ecology and Behavior Studies
- Genetic and phenotypic traits in livestock
- Isotope Analysis in Ecology
- Cryospheric studies and observations
- Indigenous Studies and Ecology
- Fish Ecology and Management Studies
- Polar Research and Ecology
- Heavy Metal Exposure and Toxicity
- Environmental DNA in Biodiversity Studies
- Transportation Planning and Optimization
- Primate Behavior and Ecology
- Pleistocene-Era Hominins and Archaeology
University of North Texas
2012
The Peregrine Fund
2006-2012
Peregrine Power (United States)
2006-2012
University of Oxford
2007-2011
Bullet fragments in rifle-killed deer (Odocoileus spp.) carrion have been implicated as agents of lead intoxication and death bald eagles (Haliaeetus leucocephalus), golden (Aquila chrysaetos), California condors (Gymnogyps californianus), other avian scavengers. Deer offal piles are present available to scavengers autumn, the degree exposure depends upon incidence, abundance, distribution per pile carcass lost wounding. In radiographs selected portions remains 38 supplied by cooperating,...
Human consumers of wildlife killed with lead ammunition may be exposed to health risks associated ingestion. This hypothesis is based on published studies showing elevated blood concentrations in subsistence hunter populations, retention residues the tissues hunter-killed animals, and systemic, cognitive, behavioral disorders human body burdens once considered safe. Our objective was determine incidence bioavailability bullet fragments venison, a widely-eaten food among hunters their...
Ecological “big data” Human activities are rapidly altering the natural world. Nowhere is this more evident, perhaps, than in Arctic, yet region remains one of most remote and difficult to study. Researchers have increasingly relied on animal tracking data these regions understand individual species' responses, but if we want larger-scale change, need integrate our understanding across species. Davidson et al. introduce an open-source archive that currently hosts 15 million location points...
Abstract Little is known about the possible influence that past glacial events have had on phylogeography and population structure of avian predators in Arctic sub‐Arctic. In this study, we use microsatellite mitochondrial control region DNA variation to investigate genetic gyrfalcons ( Falco rusticolus ) throughout a large portion their circumpolar distribution. most locations sampled, mtDNA data revealed little geographic structure; however, five out eight haplotypes were unique particular...
Genetic variation at the melanocortin-1 receptor (MC1R) gene is correlated with melanin color in a few reported vertebrates. In Gyrfalcon (Falco rusticolus), plumage exists throughout their arctic and subarctic circumpolar distribution, from white to gray almost black. Multiple variants do exist within majority of populations; however, areas (e.g., northern Greenland Iceland) possess single variant. Here, we show that white/melanic pattern observed Gyrfalcons explained by allelic MC1R. Six...
Gyrfalcons Falco rusticolus use the same nest‐sites over long periods of time, and in cold dry climate Greenland, guano other nest debris decay slowly. Nineteen samples three feathers were collected from 13 Gyrfalcon nests with stratified faecal accumulation central‐west northwest Greenland. Samples 14 C dated, oldest sample dating to c . 2740–2360 calendar years (cal yr) before present (BP) others probably > 1000 cal yr BP. Feather ranged 670 60 Although estimated age material was...
Little information exists on the movements of Gyrfalcons Falco rusticolus outside breeding season, particularly amongst High Arctic populations, with almost all current knowledge based Low populations. This study is first to provide data summer and winter ranges migration distances. We highlight a behaviour previously unknown in Gyrfalcons, which birds sea ice far from land. During 2000–2004, were collected 48 tagged satellite transmitters three parts Greenland: Thule (northwest),...
Abstract Migratory species display a range of migration patterns between irruptive (facultative) to regular (obligate), as response different predictability resources. In the Arctic, snow directly influences resource availability. The causes and consequences migratory conditions remains however unexplored. Birds migrating Arctic are expected follow spring snowmelt optimise their arrival time select for snow-free areas maximise prey encounter en-route. Based on large-scale movement data, we...
Background Our ability to monitor populations or species that were once threatened endangered and in the process of recovery is enhanced by using genetic methods assess overall population stability size over time. This can be accomplished most directly obtaining measures from temporally-spaced samples reflect as given changes diversity levels (allelic richness heterozygosity), degree differentiation (FST DEST), effective (Ne). The primary goal any effort produce a long-term self-sustaining...
Although the Atlantic puffin Fratercula arctica is well studied throughout its temperate and low Arctic breeding range, few have species in far northern distribution. This study first to present data on migratory movements of “large-billed” subspecies, F . a naumanni , that breeds high which has significantly larger body size than those farther south. During 2013–2015, migration tracks were collected from nine adult puffins (6 males 3 females) tagged with geolocators northwest Greenland....
Common eider (Somateria mollissima) populations in Greenland severely declined throughout the 20th century. As a result, 2001, harvest regulations were changed and length of hunting season was reduced. Recent data suggest that these changes have been successful, population regrowth is occurring. In Avanersuaq District, northwest Greenland, only one systematic survey quantifying number nesting eiders had previously conducted, 1997 1998. Although this district historically identified as having...
Plumage colour variation exists among Gyrfalcons throughout their Arctic and sub‐Arctic circumpolar distribution, ranging from white through silver grey to almost black. Although different variants coexist within many populations, a few geographical regions, such as northern Greenland, possess single variant, suggesting that local environments may influence plumage variation. In central‐west Greenland (66.5–67.5°N), where multiple exist, male fathered significantly earlier clutches than...
Peregrine Falcons, Falco peregrinus tundrius, were historically unknown to Inuit and early explorers in the Pituffik (Thule) area, northwest Greenland (75.90-77.60° N). Here we provide information collected from 1993-2005 on what believe is a recently established expanding population of High Arctic nesting Peregrines area associated with climate change. From 1979 2005, average mean monthly temperature, minimum maximum temperature for five-month period, May through September, increased 1.1,...
Morphological measurements of 45 adult Atlantic puffins Fratercula arctica were collected in High-Arctic Greenland between 2010 and 2016. Measurements support that the population belongs to F. a. naumanni subspecies significantly larger than those from populations found at lower latitudes, including grabae populations. Male had greater mass, bill length tarsus females, but no difference was wing length. In comparison other naumanii populations, body size most similar Svalbard. Overall,...
Arctic Terns Sterna paradisaea are an understudied species in Greenland. Outside of the largest colonies, little is known about their current population status and no long-term annual monitoring program has been established. Previous surveys outside key breeding colonies have limited to a small number for single-season studies. This limits our understanding dynamics as terns shown high degree variation reproduction readily move between nearby colonies. Here we present results first...
Gyrfalcons (Falco rusticolus) use the same nest-sites over long periods of time, and in cold dry climate Greenland, guano other nest debris decay slowly.Nineteen samples three feathers were collected from 13 Gyrfalcon nests with stratified faecal accumulation central-west northwest Greenland.Samples 14 C dated, oldest sample dating to c. 2740-2360 calendar years (cal yr) before present (BP) others likely > 1000 cal yr BP.Feather ranged 670 60 BP.Although estimated age material was correlated...
Little information exists on the movements of Gyrfalcons (Falco rusticolus) outside breeding season, particularly amongst High Arctic populations, with almost all current knowledge based Low populations.This study is first to provide data summer and winter ranges migration distances.We highlight a behavior previously unknown in Gyrfalcons, which birds sea ice far from land.During 2000-2004, were collected 48 tagged satellite transmitters three parts Greenland: Thule (northwest),...