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The ring-billed gull in Ontario : a review of a new problem species / H. Blokpoel, G.D. Tessier.: CW69-1/57E-PDF

"During the period 1976-84 the nesting population of the Ring-billed Gull (Larus delawarensis) in the Great Lakes and Upper St. Lawrence River increased at an average annual growth rate of 11%. In 1984 there were an estimated 700 000 pairs of Ring-bills in that area (about two-thirds in Canada and one-third in the USA). Because Ring-bills are highly adaptable it is likely that their numbers will continue to increase"--Abstract.

Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.855895&sl=0

Publication information
Department/Agency
  • Canada. Environment Canada.
  • Canadian Wildlife Service.
TitleThe ring-billed gull in Ontario : a review of a new problem species / H. Blokpoel, G.D. Tessier.
Series title
  • Occasional paper ; no. 57
Publication typeMonograph - View Master Record
Language[English]
Other language editions[French]
FormatDigital text
Electronic document
Note(s)
  • Digitized edition from print [produced by Environment and Climate Change Canada].
  • Issued also in French under title: Le goéland à bec cerclé en Ontario : une nouvelle espèce problème.
  • Errata sheet inside front cover.
  • Includes bibliographical references.
Publishing information
  • [Ottawa] : Canadian Wildlife Service, 1986.
Author / Contributor
  • Blokpoel, H., 1938-
  • Tessier, G. D.
Description34 p. : ill.
Catalogue number
  • CW69-1/57E-PDF
Subject terms
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