Aerial surveys for breeding waterfowl, Atlantic Region, 1985-1989 / A.J. Erskine ... [et al.].: CW69-5/85E-PDF
"With continuing concern over declines in numbers of Black Ducks (Anas rubripes), efforts to monitor breeding populations of this species were renewed in the Atlantic Provinces, beginning in 1983. Helicopter surveys in spring were begun in New Brunswick in 1985, and extended to Nova Scotia and the island of Newfoundland in 1986. These pilot projects were proposed to continue for 5 years (through 1990). Observed breeding densities were highest in N.B. and lowest in Nfld., presumably reflecting a temperate to boreal/subarctic trend. Densities increased each year in N.B. but less consistently in the other provinces. The apparent increases may reflect general recovery of populations following harvest restrictions in the U.S.A. since 1982, but the trends are not (yet) conclusive"--Abstract.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.856434&sl=0
| Department/Agency |
|
|---|---|
| Title | Aerial surveys for breeding waterfowl, Atlantic Region, 1985-1989 / A.J. Erskine ... [et al.]. |
| Series title |
|
| Publication type | Monograph - View Master Record |
| Language | [English] |
| Format | Digital text |
| Electronic document | |
| Note(s) |
|
| Publishing information |
|
| Author / Contributor |
|
| Description | 11 p. : map. |
| Catalogue number |
|
| Subject terms |
Request alternate formats
To request an alternate format of a publication, complete the Government of Canada Publications email form. Use the form’s “question or comment” field to specify the requested publication.Page details
- Date modified: