New research reveals more complex role of gray whales in the Pacific Northwest including the Salish Sea
Presentation Abstract
Most eastern North Pacific gray whales migrate seasonally from breeding areas in Mexico to primary feeding areas in the Arctic but recent research has revealed a more complex and extensive use of the Salish Sea and surrounding waters. The Pacific Coast Feeding Group (PCFG) represents about 150 gray whales that feed in spring through fall from N California to SE Alaska. Genetics and photo-identification have revealed that this group is relatively stable and distinct from the gray whales that feed in the Arctic, though some interchange has been documented and these animals interbreed in Mexico. The PCFG whales feed on a variety of prey including Mysid shrimp in the Pacific Northwest mostly outside the Salish Sea, but also extending into the Strait of Juan de Fuca. Separate from the PCFG, a number of areas inside the Salish Sea also appear to be seasonal feeding areas for a small number of gray whales that break off from their migration before continuing their migration north. One area this has been studied is in northern Puget Sound especially around Whidbey Island including the Snohomish Delta and Port Susan. Primarily from March to May, just under a dozen gray whales feed for several months apparently targeting ghost shrimp in several intertidal areas. Photo-identification of gray whales has revealed it is primarily the same individual whales that have returned annually at least going back to the early 1990s. Recent research using suction cup attached video tags on whales has provided new insights into their feeding and social interactions in this area. In collaboration with the Washington DNR, research has examined the extent of feeding on ghost shrimp and potential conflicts with a commercial harvest in this area.
Session Title
General species and food webs
Conference Track
Species and Food Webs
Conference Name
Salish Sea Ecosystem Conference (2016 : Vancouver, B.C.)
Document Type
Event
Start Date
2016 12:00 AM
End Date
2016 12:00 AM
Location
2016SSEC
Type of Presentation
Oral
Genre/Form
conference proceedings; presentations (communicative events)
Contributing Repository
Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.
Subjects – Topical (LCSH)
Gray whale--Food--Washington (State)--Puget Sound
Geographic Coverage
Puget Sound (Wash.); Salish Sea (B.C. and Wash.)
Rights
This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.
Type
Text
Language
English
Format
application/pdf
New research reveals more complex role of gray whales in the Pacific Northwest including the Salish Sea
2016SSEC
Most eastern North Pacific gray whales migrate seasonally from breeding areas in Mexico to primary feeding areas in the Arctic but recent research has revealed a more complex and extensive use of the Salish Sea and surrounding waters. The Pacific Coast Feeding Group (PCFG) represents about 150 gray whales that feed in spring through fall from N California to SE Alaska. Genetics and photo-identification have revealed that this group is relatively stable and distinct from the gray whales that feed in the Arctic, though some interchange has been documented and these animals interbreed in Mexico. The PCFG whales feed on a variety of prey including Mysid shrimp in the Pacific Northwest mostly outside the Salish Sea, but also extending into the Strait of Juan de Fuca. Separate from the PCFG, a number of areas inside the Salish Sea also appear to be seasonal feeding areas for a small number of gray whales that break off from their migration before continuing their migration north. One area this has been studied is in northern Puget Sound especially around Whidbey Island including the Snohomish Delta and Port Susan. Primarily from March to May, just under a dozen gray whales feed for several months apparently targeting ghost shrimp in several intertidal areas. Photo-identification of gray whales has revealed it is primarily the same individual whales that have returned annually at least going back to the early 1990s. Recent research using suction cup attached video tags on whales has provided new insights into their feeding and social interactions in this area. In collaboration with the Washington DNR, research has examined the extent of feeding on ghost shrimp and potential conflicts with a commercial harvest in this area.
