Activity budgets, habitat functions and survival of wintering northern pintails in Sinaloa, Mexico / Rodrigo Esteban Migoya von Bertrab.
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TextPublication details: Syracuse, NY : State University of New York, 1993.Description: xii, 73 leaves : ill. , map ; 28 cmOnline resources: Abstract: I examined the activities of northern pintail (Anas acuta) (hereinafter referred as pintails) in the Ensenada del Pabellon Coastal System (hereinafter referred as Pabellon) in Sinaloa, Mexico over the winters of 1989-90, 1990-91 and 1991-92. Dominant daytime behavior categories were resting (47%), feeding (19%), preening (17%) and locomoting (13%).Radio-insrumented females (n=47-59) were used to lead observers to pintail flocks, where time budget data were collected. Time activity observations revealed pintails used 4 habitat types for different functions. Natural marshes were used for resting (34-58%), feeding (5-38%), and social activity (0.4-6%). Ephemeral ponds also were used for feeding (7-43%) and social acitivity (0.3-4.1%) during some wintering periods, but they ususally functioned as resting areas (30-71%). Mangrove mudflats were used for resting (51-79%), whereas reservoirs were used for social activity (1-5%), particularly during widwinter; feeding was lowest on mangrove m
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Thesis(Ph.D.)--State University of New York, 1993.
Includes bibliographical references (leaves 69-71).
I examined the activities of northern pintail (Anas acuta) (hereinafter referred as pintails) in the Ensenada del Pabellon Coastal System (hereinafter referred as Pabellon) in Sinaloa, Mexico over the winters of 1989-90, 1990-91 and 1991-92. Dominant daytime behavior categories were resting (47%), feeding (19%), preening (17%) and locomoting (13%).Radio-insrumented females (n=47-59) were used to lead observers to pintail flocks, where time budget data were collected. Time activity observations revealed pintails used 4 habitat types for different functions. Natural marshes were used for resting (34-58%), feeding (5-38%), and social activity (0.4-6%). Ephemeral ponds also were used for feeding (7-43%) and social acitivity (0.3-4.1%) during some wintering periods, but they ususally functioned as resting areas (30-71%). Mangrove mudflats were used for resting (51-79%), whereas reservoirs were used for social activity (1-5%), particularly during widwinter; feeding was lowest on mangrove m