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.

Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.857472&sl=1

Renseignements sur la publication
Ministère/Organisme Canada. Environment Canada.
Canadian Wildlife Service. Pacific and Yukon Region.
Titre Aerial surveys of waterfowl and gulls on the Fraser River delta, 1992-93 / K. Summers, P. Hayes, R. McKelvey.
Titre de la série Technical report series ; no. 203
Type de publication Série - Voir l'enregistrement principal
Langue [Anglais]
Format Électronique
Document électronique
Autres formats offerts Papier-[Anglais]
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.
Information sur la publication Delta, B.C. : Canadian Wildlife Service, Pacific and Yukon Region, 1994.
Auteur / Contributeur Summers, Ken R.
Hayes, Patricia.
McKelvey, Richard W.
Description v, 64 p. : charts, map.
Numéro de catalogue
  • CW69-5/203E-PDF
Descripteurs Water birds
Bird populations
Bird surveys
Fraser River Delta (B.C.)
Demander des formats alternatifs
Pour demander une publication dans un format alternatif, remplissez le formulaire électronique des publications du gouvernement du Canada. Utilisez le champ du formulaire «question ou commentaire» pour spécifier la publication demandée.
Date de modification :