Could the blood parasite Leucocytozoon deter mallard range expansion
Article Abstract:
Crosses between mallard ducks (Anas platyrhynchos) and American black ducks (A. rubripes) were performed to evaluate the effects of the blood parasite of mallards, Leucocytozoon simondi, on the range expansion of mallards and the potential of the infection to affect othe duck population. Offsprings from the crosses that were tested positive for infection showed symptoms and abnormal behavior, but did not prove fatal even if 91% of the offspring population were infected with a significant number developing intense parasitemias.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1996
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Norway rats as predators of burrow-nesting seabirds: insights from stable isotope analyses
Article Abstract:
Stable isotope measurements are used to analyze the stomach contents of rats and prey organisms from three regions of Langara Island, British Columbia, Canada, specifically to evaluate evidence for marine foods, including seabirds. Measurement of muscle and liver tissues of rats and prey organisms revealed that the three isotopic groups of rats corresponding to upland, littoral and seabird nesting areas on the island remained isotopically segregated at least over the two-month period of ancient murrelet breeding.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1999
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Modeling annual mallard production in the prairie-parkland region
Article Abstract:
It appears that different environmental factors may affect mallard production in different parts of the prairie-parkland region. These factors could be hidden at larger scales. Reduction of cultivation of marginal lands could be the most feasible management approach for boosting mallard production.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 2000
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