Steller Sea Lion Counts in Oregon During June and July, 1975-1991

Identification Information

Citation

Originator: Brown, Robin F. and Susan D. Riemer

Publish Date: 1992

Online Link: None

BPA Project #:

Contact Information

Agency: Oregon Department of Fish and Wildlife

Name: Cedric Cooney

Job Position: Natural Resources Data and Systems Manager

Telephone: 503-947-6094

E-Mail Address: cedric.x.cooney@odfw.oregon.gov

Description

Abstract: Steller sea lion (Eumetopias jubatus) abundance and distribution in Oregon was monitored by aerial photographic survey and limited ground visits to rookeries between 1975 and 1991. Steller sea lions were found hauled out at ten different locations along the Oregon coast. Newborn pups were seen at three sites, with most occurring at Rogue Reef and Orford Reef on the southern coast. The greatest pup count occurred in 1990 when 794 were observed during ground visits and aerial surveys. Statewide counts of adult and juvenile Steller sea lions have fluctuated between 2,500 and 3,000 over the past 10 years. Sea lion abundance in Oregon probably increased from the 1,500 to 2,000 adults and juveniles counted during the mid- to late-1970's. The relatively short data series and questions of survey methodology used during the 1970's made it difficult to more accurately assess trends in Steller sea lion abundance in Oregon at this time.

Purpose:

Time Period of Content: 1975-1991

Geographic Extent: Oregon

Status: Final

Use Constraints:

Format: PDF

Data Quality Information

Lineage-Source: Prepared for: National Oceanic and Atmospheric Administration. In partial fulfillment of requirements for NOAA, NMFS Copperative Agreements and Grants NA-84-ABH-00028; NA-86-ABH-00020; NA-87-ABH-00028; NA88-ABD-00103; NA88AB-D-FM1003; NA17FX0278-01

Data Information

No data information was supplied.

Entity and Attribute Information

Attributes Description: Field attribute information is available in the attached file(s).

Is a physical copy maintained for reference at Headquarters? Unknown