high seroprevalence of antibodies to avian influenza viruses among wild waterfowl in alaska: implications for surveillance.we examined seroprevalence (presence of detectable antibodies in serum) for avian influenza viruses (aiv) among 4,485 birds, from 11 species of wild waterfowl in alaska (1998-2010), sampled during breeding/molting periods. seroprevalence varied among species (highest in eiders (somateria and polysticta species), and emperor geese (chen canagica)), ages (adults higher than juveniles), across geographic locations (highest in the arctic and alaska peninsula) and among years in tundra swans (cygnus ...201323472177
hematology, plasma chemistry, and bacteriology of wild tundra swans (cygnus columbianus) in alaska.blood and cloacal swabs were collected from 100 (66 female, 34 male) wild tundra swans (cygnus columbianus) molting in northwestern alaska, usa, 25-28 july 2008, to establish hematologic and serum chemistry reference values and to isolate enteric salmonella spp. and escherichia coli o157:h7. plasma biochemistry and hematology values did not vary significantly by sex or age. tundra swans had high levels of creatine kinase, lactate dehydrogenase, amylase, and alkaline phosphatase compared with som ...201222247394
blood lead concentrations in alaskan tundra swans: linking breeding and wintering areas with satellite telemetry.tundra swans (cygnus columbianus) like many waterfowl species are susceptible to lead (pb) poisoning, and pb-induced mortality has been reported from many areas of their wintering range. little is known however about pb levels throughout the annual cycle of tundra swans, especially during summer when birds are on remote northern breeding areas where they are less likely to be exposed to anthropogenic sources of pb. our objective was to document summer pb levels in tundra swans throughout their b ...201424468922
molecular detection of hematozoa infections in tundra swans relative to migration patterns and ecological conditions at breeding grounds.tundra swans (cygnus columbianus) are broadly distributed in north america, use a wide variety of habitats, and exhibit diverse migration strategies. we investigated patterns of hematozoa infection in three populations of tundra swans that breed in alaska using satellite tracking to infer host movement and molecular techniques to assess the prevalence and genetic diversity of parasites. we evaluated whether migratory patterns and environmental conditions at breeding areas explain the prevalence ...201223049862
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