Seabirds - Sentinel Species for the Gulf

cover of publication

Analyzing population trends in seabirds living in the migratory bird sanctuaries on the North Shore of the Gulf of St. Lawrence since 1925 provides an indication about the state of health of the Gulf of St. Lawrence. The trends of the 5 chosen species differ greatly. The population of Herring Gull is now stable, after it followed the expansion and collapse of the cod fishery. The Caspian Tern only breeds sporadically nowadays. Populations of alcids somewhat recovered in the last 30 years, but the 3 species' (Common Murre, Razorbill, Atlantic Puffin) recent trends are diverging. Identifying the causes of these trends would require further study.

Available Formats:


Environment Canada produces a wide variety of publications in various print and electronic formats. Some formats may not be accessible to screen readers. Alternate accessible formats are available upon request. Please contact

  • Author: Environment Canada
  • Language of Document: Separate English/French
  • Document Type: Fact sheet
  • Cat. No.: En153-114/2-2014E-PDF
  • ISBN: 978-1-100-22879-2
  • Size: 21.6x28
  • Pages: 6
  • Year: 2014
Date modified: