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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.
TitreAerial 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 publicationMonographie - Voir l'enregistrement principal
Langue[Anglais]
FormatTexte numérique
Document électronique
Autres formats offertsTexte matériel-[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.
Descriptionv, 64 p. : charts, map.
Numéro de catalogue
  • CW69-5/203E-PDF
Descripteurs
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