00000nam 2200000zi 4500 9.894263 CaOODSP 20221107173704 m o d f cr |n||||||||| 201203e201703##nfcbod ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- NE22-4/205E-PDF Fifield, David A., author. Effectiveness of observers in visually detecting dead seabirds on the open ocean / D.A. Fifield, S. Avery-Gomm, L.A. McFarlane Tranquilla, P.C. Ryan, C. Gjerdrum, A. Hedd, M.G.Fitzsimmons, G.J. Robertson. Efficacité avec laquelle les observateurs détectent visuellement les oiseaux marins morts en pleine mer St. Johns, Newfoundland : Environmental Studies Research Funds : Wildlife Research Division, Environment and Climate Change Canada, March 2017. 1 online resource (97 pages) : maps, photographs, charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier Environmental Studies Research Funds report ; 205 "Final report." Includes bibliographical references (pages 35-37). "Assessing the environmental effects and impacts of oil spills is challenging, even when assessing impacts on highly visible top predators such as marine birds. The number of methods to assess the effects and impacts on marine birds from oil spills are limited, and require many assumptions, especially when pre-spill data are not available. In offshore environments the methods become even more constrained, because beached bird carcass surveys are not possible"--Executive summary, page 7. Includes executive summary in French. Sea birds Effect of oil spills on Canada. Sea birds Mortality Canada. Sea birds Counting Canada. Oiseaux de mer Effets des déversements de pétrole sur Canada. Oiseaux de mer Mortalité Canada. Oiseaux de mer Comptage Canada. Canada. Environment and Climate Change Canada. Wildlife Research Division, issuing body. Environmental Studies Research Funds (Canada), issuing body. Environmental Studies Research Funds report ; 205. (CaOODSP)9.504902 PDF 3.37 MB https://publications.gc.ca/collections/collection_2020/one-neb/NE22-4-205-eng.pdf