Sociability of male mallards and an evaluation of indicated breeding pair criteria to estimate mallard breeding populations / Michael G. Brasher
Material type:
TextPublication details: Mississippi State : Mississippi State University, 2000.Description: xi, 72 leaves ; 28 cmSubject(s): Online resources: Abstract: Indicated breeding pair (IBP) criteria have been used since the early 1950s to estimate breeding duck populations, yet no study has evaluated these criteria for accuracy of population estimation. During spring aerial and ground surveys, pairs of ducks, lone males, and groups of 2-4 males that are observed by biologists are assumed to represent IBPs.Ducks in mixed-groups of males and females are believed to represent a nonbreeding component of populations. I captured, radiomarked (n = 90),and visually observed paired and unpaired male mallards (Anas platyrhynchos) in Manitoba in 1998 and Saskatchewan in 1999 to investigate their sociability and evaluate accuracy of IBP criteria.Sociability of paired and unpaired males varied during the breeding season.
| Item type | Current library | Collection | Call number | Status | Date due | Barcode |
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Electronic Report
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Electronic Library | Non-fiction | BRA (Browse shelf(Opens below)) | Available | 4467 |
Thesis(M.S.)--Mississippi State University, 2000.
Includes bibliographical references.
Indicated breeding pair (IBP) criteria have been used since the early 1950s to estimate breeding duck populations, yet no study has evaluated these criteria for accuracy of population estimation. During spring aerial and ground surveys, pairs of ducks, lone males, and groups of 2-4 males that are observed by biologists are assumed to represent IBPs.Ducks in mixed-groups of males and females are believed to represent a nonbreeding component of populations. I captured, radiomarked (n = 90),and visually observed paired and unpaired male mallards (Anas platyrhynchos) in Manitoba in 1998 and Saskatchewan in 1999 to investigate their sociability and evaluate accuracy of IBP criteria.Sociability of paired and unpaired males varied during the breeding season.