. The Canadian field-naturalist. 1994 Gaston: Status of The Ancient Murrelet in Canada 213 ed by the US Fish and Wildlife Service Catalogue between Shelikof Strait and south-east Alaska. Numbers in Alaska must have been much higher in the past (Lensink 1984), because foxes were intro- duced onto most of the Aleutians from 1750 onwards to encourage fur trapping (Jones and Byrd 1979; Bailey and Kaiser 1993). Existing populations of Ancient Murrelets in the eastern Aleutians are all on fox-free islands (Nysewander et al. 1982*). Where foxes have died out, or been removed, Ancient Murrelet populat
. The Canadian field-naturalist. 1994 Gaston: Status of The Ancient Murrelet in Canada 213 ed by the US Fish and Wildlife Service Catalogue between Shelikof Strait and south-east Alaska. Numbers in Alaska must have been much higher in the past (Lensink 1984), because foxes were intro- duced onto most of the Aleutians from 1750 onwards to encourage fur trapping (Jones and Byrd 1979; Bailey and Kaiser 1993). Existing populations of Ancient Murrelets in the eastern Aleutians are all on fox-free islands (Nysewander et al. 1982*). Where foxes have died out, or been removed, Ancient Murrelet populations are recovering (Bailey 1978; Bailey and Faust 1980; Bailey and Kaiser 1993). The Ancient Murrelet population in southeastern Alaska is concentrated on Forrester Island, on the north side of Dixon Entrance, where a survey by DeGange et al. (1977) gave an estimate of 30 000 pairs, making it the largest colony outside of Haida Gwaii. The only other colony of any size is on St. Lazaria Island (1000: Nelson et al. 1987). Population size and trend: Canada Ancient Murrelets in Haida Gwaii are concentrat- ed in two areas: off the west coast of Graham Island, and off the east coast of Moresby Island (Figure 2). Both of these areas supported about 120 000 breed- ing pairs in the 1980s (Rodway 1991). The northern population is concentrated in three large colonies, on Langara (15 000 pairs in 1993), Frederick (68 000 in NUMBER OF BREEDING PAIRS FREDERICK I • 1 - 100 • 101 - 1000 • 1001 - 10000 • 10001 - 100000 A Abandoned. WILLIE HELGESEN I. 0 CARSWELL I 4 LIHOU l-O INSTRUCTOR I. LUXMOORE I. ROGERS I O CAPE KUPEH A SKEDANS IS. • LIMESTONE IS. O REEF I. Ilyelli. AGGLOMERATE I. • MURCHISON I. | RAMSAY I. AARICHIKAI. ALDER I. G HOWAY I. EAST COPPER I. JEFFREY I. M GEORGE I. SKINCUTTLE I. A BOULDER I. A SEA PIGEON I. ANTHONY I. •- Figure 2. Ancient Murrelet colonies in the Queen Charlotte Islands (after Rodway 1991). Please note that these images are extracted from scanned p
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