2011 Northern Fur Seal Adult Male Counts on the Pribilof Islands, Alaska
Adult male northern fur seal count
Adult male northern fur seals on St. Paul, and St. George Islands (Table 1) were counted during the period July 9 to 14, 2011. Counts of territorial males with females ("harem" males) on St. George increased by 1.4% compared to 2010, while idle males (includes classes 2 and 5 from Table 1) on St. George increased by 8.0%. On St. Paul the idle males increased by 6.2% and the "harem" males decreased by 3.6% since 2010 (Figure 1). Overall, the total number of adult males counted on the Pribilof Islands in 2011 increased by 2.3% from 2010 to 10,922. The total number of territorial males with females decreased by 2.8% on the Pribilof Islands.
The rate of entanglement among adult females on St. Paul in 2011 was estimated during the counting of adult males, following established protocol. This year the results produced an estimated entanglement rate of 0.04% (Table 2).