00000nam 2200000za 4500 9.858287 CaOODSP 20241203113643 cr ||||||||||| 180628s2002 nfcab||#o f000 0 eng d print edition 0662318048 CaOODSP eng eng fre n-cn-nf CW69-5/381E-PDF CW69-5/381E Robertson, Gregory J. (Gregory James), 1970- Changes in seabird populations breeding on Small Island, Wadham Islands, Newfoundland [electronic resource] / Gregory J. Robertson and Richard D. Elliot. [Mount Pearl, N.L.] : Canadian Wildlife Service, Atlantic Region, 2002. iii, 26 p. : ill., map Canadian Wildlife Service technical report series ; no. 381 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (p. 8-9). "Numbers of breeding seabirds on Small Island, in the Wad ham Islands, off the northeastern coast of Newfoundland, were estimated in July 2001. Based on hole counts and their occupancy rates an estimated 6 190 ± 355 (5 453 - 6 939; 95% CI) pairs of Atlantic Puffin (Fratercula arctica) bred on Small Island in 2001; a reduction of 59% since 1984. Based on the densities of occupied burrows and the total occupied area, an estimated 1 038 ± 255 (506 - 1 571; 95% CI) pairs of Leach's Storm-petrel (Oceanodroma leucorhoa) bred in 2001; a 92% reduction since 1984. The appearance of a small Great Black-backed Gull (Larus marinus) colony on this island in the early1980s may explain the reduction in petrels and puffins. In contrast, Razorbills (Alcatorda) increased dramatically from 15 pairs breeding in 1984 to a minimum of 194 breeding in 2001. Razorbills are not susceptible to predation by gulls, and, as with Razorbill populations elsewhere, the population has increased on Small Island"--Summary, p. iii. Includes summary in French. gccst Ecosystems gccst Aquatic birds gccst Migratory birds Elliot, R. D. (Richard Donald), 1946- Canada. Environment Canada. Canadian Wildlife Service. Atlantic Region. Technical report series (Canadian Wildlife Service) no. 381 (CaOODSP)9.504438 PDF 12.02 MB https://publications.gc.ca/collections/collection_2018/eccc/cw69-5/CW69-5-381-eng.pdf