00000nam 2200000za 4500 9.857727 CaOODSP 20241203113643 cr ||||||||||| 180614s1994 bccb o f00| 0 eng d CaOODSP eng eng fre n-cn-bc CW69-5/218E-PDF Harfenist, Anne, 1957- Effects of introduced rats on nesting seabirds of Haida Gwaii [electronic resource] / Anne Harfenist. Delta, B.C. : Canadian Wildlife Service, Pacific and Yukon Region, 1994. vi, 52 p. : maps. Technical report series ; no. 218 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (p. 33-34). "In 1993, I conducted studies on two islands in Haida Gwaii (Queen Charlotte Islands) to determine effects of introduced rats on breeding seabirds. The breeding population of ancient murrelets (Synthliboramphus antiquus) on Langara Island declined by approximately 40% between 1988 and 1993 to a level less than 10% of its historical size. The colony covered only about 50% of the area used by murrelets in 1988. Predation on ancient murrelet eggs and adults by Norway rats (Rattus norvegicus) appears to be the primary cause of the colony decline"--Abstract. Issued also in print format. Includes abstract in French. gccst Aquatic birds gccst Population gccst Rodents Canada. Environment Canada. Canadian Wildlife Service. Pacific and Yukon Region. Effects of introduced rats on nesting seabirds of Haida Gwaii / (CaOODSP)9.611666 Technical report series (Canadian Wildlife Service) no. 218. (CaOODSP)9.504438 PDF 3.42 MB https://publications.gc.ca/collections/collection_2018/eccc/cw69-5/CW69-5-218-eng.pdf