The ecology of post-fledging American black ducks in eastern Maine / Catherine Frazer.
Material type:
TextSeries: Thesis. (M.S.)Publication details: Orono, ME : University of Maine, 1988.Description: ix, 90 leaves : ill. ; 28 cmOnline resources: Abstract: This study was conducted to describe the ecology of juvenile American black ducks (Anas rubripes) between the time of fledging and fall migration, a previously unstudied period of the black duck lifecycle.Habitat preferences, movements and social behavior of 97 female and 15 male juvenile black ducks were studied from early September to mid-December, 1985-1987, in the vicinity of Moosehorn National Wildlife Refuge (NWR) in eastern Maine and southwestern New Brunswick. Use of 10 habitat types was compared to their availability, based on the wetland types at 640 random points within a 333.3 km2 circular area. The most preferred habitat type during both day and night in all years and months was Palustrine Emergent Wetland (P < 0.05), while Lacustrine and Estuarine habitats rarely were used. Riverine habitats were used less than their availability (P < 0.10) in September, but became preferred habitats (P < 0.10) or were used in proportion to their availability (P > 0.10) in November , as
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Thesis(M.S.)--University of Maine, 1988.
"August, 1988."
Includes bibliographical references (leaves 83-89).
This study was conducted to describe the ecology of juvenile American black ducks (Anas rubripes) between the time of fledging and fall migration, a previously unstudied period of the black duck lifecycle.Habitat preferences, movements and social behavior of 97 female and 15 male juvenile black ducks were studied from early September to mid-December, 1985-1987, in the vicinity of Moosehorn National Wildlife Refuge (NWR) in eastern Maine and southwestern New Brunswick. Use of 10 habitat types was compared to their availability, based on the wetland types at 640 random points within a 333.3 km2 circular area. The most preferred habitat type during both day and night in all years and months was Palustrine Emergent Wetland (P < 0.05), while Lacustrine and Estuarine habitats rarely were used. Riverine habitats were used less than their availability (P < 0.10) in September, but became preferred habitats (P < 0.10) or were used in proportion to their availability (P > 0.10) in November , as