Aerial surveys of waterfowl and gulls on the Fraser River delta, 1992-93 / K. Summers, P. Hayes, R. McKelvey.: CW69-5/203E-PDF
"This report presents the results of 14 weekly aerial surveys for waterfowl and gulls flown over the Fraser River estuary between mid October 1992 and mid January 1993. The data are compared to those summarized for 1966-74, 1982-83, 1983-84 and 1989-90 by McKelvey and Summers (1990). The annual estimate of dabbling duck use of the entire estuary (Boundary Bay and the Fraser River foreshore) was higher than for 1989-90 but still below that of earlier surveys. Mean total numbers of gulls were higher than for all previous surveys. Waterfowl counts were highly variable between surveys. Comparisons with mid-winter counts from the U.S. in the Pacific flyway were made. Although the Fraser River estuary showed an increase in waterfowl populations for 1992, while the flyway continued to show a decline, the overall downward trend is still apparent"--Abstract, p. ii.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.857472&sl=0
| Department/Agency | Canada. Environment Canada. Canadian Wildlife Service. Pacific and Yukon Region. |
|---|---|
| Title | Aerial surveys of waterfowl and gulls on the Fraser River delta, 1992-93 / K. Summers, P. Hayes, R. McKelvey. |
| Series title | Technical report series ; no. 203 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| Other formats | Paper-[English] |
| Note(s) | Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (p. 14). Issued also in print format. Includes abstract in French. |
| Publishing information | Delta, B.C. : Canadian Wildlife Service, Pacific and Yukon Region, 1994. |
| Author / Contributor | Summers, Ken R. Hayes, Patricia. McKelvey, Richard W. |
| Description | v, 64 p. : charts, map. |
| Catalogue number |
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| Subject terms | Water birds Bird populations Bird surveys Fraser River Delta (B.C.) |