. The Canadian field-naturalist. 328 The Canadian Field-Naturalist Vol. 102 (26) (26) (25) (25) (30) (13) (5) (7) (2) i—(1 m: Figure 7. Monthly mean, standard error of the mean, and maximum number of Steller Sea Lions seen at Race Rocks by T. Anderson, the Hght house keeper, during 197L Number of days observed in parentheses. this time. Fishery officers also noted that the species entered numerous long inlets throughout the mainland coast of British Columbia during February-April to feed on spawning Pacific Herring {Clupea harengus pallasi), and Eulachon (Bigg 1984). Departure from winter site
. The Canadian field-naturalist. 328 The Canadian Field-Naturalist Vol. 102 (26) (26) (25) (25) (30) (13) (5) (7) (2) i—(1 m: Figure 7. Monthly mean, standard error of the mean, and maximum number of Steller Sea Lions seen at Race Rocks by T. Anderson, the Hght house keeper, during 197L Number of days observed in parentheses. this time. Fishery officers also noted that the species entered numerous long inlets throughout the mainland coast of British Columbia during February-April to feed on spawning Pacific Herring {Clupea harengus pallasi), and Eulachon (Bigg 1984). Departure from winter sites throughout British Columbia appears to be essentially completed by late May. Population Trends British Columbia: The number of Steller Sea Lions in British Columbia apparently increased during the late 1800s and early 1900s. Newcombe et al. (1918) stated that fishermen felt sea hons were more numerous in 1913 than in the late 1800s. This increase may have been caused by a recovery of the population after an earlier depletion by natives for meat, hides, oil and other products (Newcombe and Newcombe 1914; Wailes and Newcombe 1929). The Alaska Department of Fish and Game (1973) reported the species in Alaska was reduced prior to 1900 for the same reason. If natives did deplete the population in British Columbia, then the numbers of sea lions would have been low during the early 1800s, when the number of Indians was relatively high — at about 70 000 (Duff 1977). By 1885, epidemics had reduced the Indian population to only 28 000. Utilization of sea lions also decreased through the 1800s, with few Indians in British Columbia relying on them by the early 1900s. The growing numbers of sea lions resulted in the census in 1913, and the control programs. The changes in population size in British Columbia after 1913 can be traced using the two indices: total number of pups and non-pups seen on rookeries, and total number of pups born (Table 3). Newcombe and Newcombe (1914) estimated
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