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Densities of breeding American black ducks in southcentral Maine: 1958-60 and 1978-80

Co-published by the Black Duck Joint Venture, North American Waterfowl Management Plan. OCLC: 42352724. Abstract no. 6 in publication.
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Abstract

Numbers of wetlands and amount of surface water (ha) within a 105 km2 area increased substantially between 1958-60 and 1978-80 in southcentral Maine. Conversely, in 1978-80 mean numbers of black duck pairs (11.9/100 ha surface water) and broods (10.8/100 ha surface water) were lower than for 1958-60 (pairs = 23.3; broods = 13.3) for wetlands surveyed in both periods. Differences in pairs are discussed in terms of wetland changes and in terms of differences in numbers of black ducks counted in the Atlantic Flyway mid-winter inventory for comparable years.

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Densities of breeding American black ducks in southcentral Maine: 1958-60 and 1978-80
Year Published:
1997
Language:
English
Publisher:
Black Duck Joint Venture
Publisher location:
Grand Falls, New Brunswick
Contributing office(s):
Patuxent Wildlife Research Center
Description:
57
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
Larger Work Title:
American Black Duck Symposium: Saint John, New Brunswick, Canada, 1990
First page:
23 (abs)
Number of Pages:
57