2017 Northern Fur Seal Adult Male Counts on the Pribilof Islands, Alaska

Adult male northern fur seals on St. Paul Island were counted over the period July 9 to 15, 2017

Adult male northern fur seals on St. Paul Island were counted over the period July 9 to 15, 2017. Adult male seals were not counted on St. George Island in 2017 due to an extended period of canceled flights preventing observer access. Counts of territorial males with females (class 3; "harem" males) on St. Paul Island decreased by 9.6% compared to 2016. Idle males (classes 2 and 5,) on St. Paul Island increased in comparison to 2016 by 21.3%. Overall, the total number of adult males counted on St. Paul Island in 2017 increased by approximately 4.0% from 6,029 in 2016 to 6,268.

 

Table 1. Number of adult male northern fur seals counted, by rookery, Pribilof Islands, Alaska, July 2017.

NorthernFurSealAdultMaleCounts.jpg

* Adult males are assumed to be equal to or greater than 7 years of age. Class 2 – territorial without females; Class 3 – territorial with females; Class 5 – hauling ground males.

** Haulouts adjacent to the rookery were counted on a different day than the rookery area.

 

Northern Fur Seal Research, Adult Male Count Graphic
Northern Fur Seal Research, Adult Male Count Graphic

Figure 1. Northern fur seal adult males (harem, class 3 – thick line; idle, classes 2 and 5 – thin) counted on the Pribilof Islands 1975-2017. No counts were made on St. George Island in 2017.

Additional Resources

Resources

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Prey Selection of Subadult Male Northern Fur Seals (Callorhinus ursinus) and Evidence of Dietary Niche Overlap with Adult Females During the Breeding Season

During the breeding season, northern fur seals (Callorhinus ursinus) congregate on the Pribilof Islands in large numbers creating the potential for intraspecific...

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Scoping Report for Northern Fur Seal Harvest Regulations - Environmental Assessment (2012)

This report reviews the comments received during the scoping period regarding proposed changes to the northern fur seal Harvest Regulations for St. George...

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Investigations of Peritoneal and Intestinal Infections of Adult Hookworms in Northern Fur Seal and California Sea Lion Pups on San Miguel Island, California

The peritoneal cavity and intestine of northern fur seal (Callorhinus ursinus) pups and California sea lion (Zalophus californianus) pups that died in...