. The Canadian field-naturalist. 1988 Bigg: Status of the Steller Sea Lion 331 Table 8. Number of Steller Sea Lions seen off southeastern Vancouver Island during 1972 to 1984. 1972 1973 1977 1978 1982 1984 25 Feb. 25 Jan. 7-9 Feb. 9 Feb. 17-22 Feb. 15-16 Feb. Race Rocks 71 45 68 139 53 22 Plumper Sound area 0 0 286 115 294 23 Porlier Pass area 0 0 0 0 105 112 Ada Island 0 40 211 351 163 139 Denman Island 0 0 0 0 324 0 Other 0 0 0 15 43 32 Total 71 85 565 622 983 328 example, the species was seen regularly for the first time at Ada Island and Trail Islands in 1973, at Plumper Sound in 1977, at
. The Canadian field-naturalist. 1988 Bigg: Status of the Steller Sea Lion 331 Table 8. Number of Steller Sea Lions seen off southeastern Vancouver Island during 1972 to 1984. 1972 1973 1977 1978 1982 1984 25 Feb. 25 Jan. 7-9 Feb. 9 Feb. 17-22 Feb. 15-16 Feb. Race Rocks 71 45 68 139 53 22 Plumper Sound area 0 0 286 115 294 23 Porlier Pass area 0 0 0 0 105 112 Ada Island 0 40 211 351 163 139 Denman Island 0 0 0 0 324 0 Other 0 0 0 15 43 32 Total 71 85 565 622 983 328 example, the species was seen regularly for the first time at Ada Island and Trail Islands in 1973, at Plumper Sound in 1977, at Sand Heads in 1978, Denman Island in 1979, and Porlier Pass in 1982. The number of animals increased progressively between 1972 and 1982. The trend of increasing numbers during the 1970s was also indicated from daily counts at two haulouts. Some animals at these sites were hidden from view, and so the numbers given are indicative mainly of trends rather than absolute numbers. Sea lions were not seen at Race Rocks up to the early 1960s (Figure 10). A few animals were present by the mid-1960s, and numbers increased through to 1978, reaching a peak of 250 animals. At Ada Island, numbers increased up to 1978, reached a peak of about 400 animals, and remained at fairly stable level up to 1982 (Figure 11). However, between 1982 and 1984 a sharp decline took place off southeastern Vancouver Island with the main decreases at Denman Island and Plumper Sound (Table 8). The yearly changes in numbers of animals seen off southeastern Vancouver Island were likely due to shifts in the distribution of wintering animals. The changes did not mirror variations in the size of the populations at rookeries in British Columbia, at Forrester Island, or at rookeries off Oregon and. Figure 10. Monthly maximum number of Steller Sea Lions seen at Race Rocks during 1965 to 1979 as recorded by T. Anderson, the light house keeper. California (Le Boeuf and Bonnel 1980; Loughlin et al. 1984). The increase in n
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