4 minute read
Skagit Central to Orca Whale and Puget Sound Chinook Recovery
By Richard Brocksmith, Executive Director Skagit Watershed Council
Many people in the Pacific Northwest have either grown up with, or have come to love, our Orca whales. They live alongside us in Puget Sound; they have strong, mother-led family groups who teach their young how to survive in the wide world; and their intellectual capacity and curiosity, maybe even feelings, have captured our imagination.
Most folks know our local Orca whales are in very serious trouble and might not survive much longer without significant changes from our human society. A few background facts that are important: • Orca whale family groups or “pods” live in every ocean in the world, but three pods (named J, K, and L) have evolved to become their own species in Puget Sound. They are known as
“Southern Residents.” • These Southern Residents eat only salmon, unlike the “transient” pods that eat marine mammals such as seals and sea lions. • The salmon-eating Southern Residents have seen a population decline over the last 25 years, dropping from a high of 98 whales to a low of 73 whales. This decline caused the federal government to list them as endangered with extinction under the Endangered Species Act.
• The recent decline is blamed first and foremost on the dramatic decrease in their preferred prey, Chinook salmon, but also due to increases in water-borne contaminants and boat noise. Southern Residents prefer Chinook salmon at least 80% of the time (with chum and other salmon making up the balance) because of that salmon’s larger size, fat content, return timing, and the fact that some of them choose to reside in Puget Sound instead of going out to the Northern Pacific Ocean. Spyhopping in the Salish Sea.
• Interestingly, the transient whales, who as their name implies range further around the West Coast than the Southern Residents (including into Puget Sound), have been increasing during this same time period. That’s because unlike salmon, their favorite prey item of seals and sea lions have increased.
Southern Resident Orcas range from the Queen Charlotte Islands in Canada down to the California Coast, but historically spent much of their summers in Puget Sound. They historically had access to rich salmon fishing grounds that included the Fraser River, Puget Sound, the Columbia River, and the Sacramento River, all of which produced
huge runs of Chinook salmon. This “biocomplexity” of having different rivers to fish allowed them to adjust their feeding locations as different rivers had higher or lower success in producing Chinook salmon from year to year.
Southern Resident Orcas historically chose Puget Sound in the spring and summer as they had ample access to Chinook salmon returning to the Fraser River in Canada as well as Puget Sound Rivers. Also, these Chinook demonstrate different run timing, so that some come back in spring, some in summer, and some in fall, providing that biocomplexity and thus reducing risk if one Chinook population should crash in any year.
Water=Life Except for the air we breathe, water is the single most important element in our lives.
It’s too precious to waste. Use it wisely.
For simple water-saving ideas you can use at home or work, visit www.SkagitPUD.org.
Here’s where the Skagit River comes into play. Of all the Puget Sound Rivers, Skagit produces more than half of all wild Chinook, both historically and today, which is roughly an order of magnitude more than any other river. Anywhere from 5,000 to 25,000 Chinook salmon return to the Skagit River every year! The Skagit is also the largest contributor of spring Chinook salmon in Puget Sound by far, with several thousand of them returning annually.
It’s easy to see why the Skagit is the most important Chinook producer in Puget Sound for Southern Resident Orca recovery. This
is a fact that we as Skagitonians, or those that come to play in Skagit, can be very proud of, but also hopefully will embrace as strong environmental advocates for preserving and restoring this special place.
Time is of utmost importance as our Orcas face a very real threat of extinction.
To learn or do more to help Skagit recovery Southern Resident Orca Whales and Chinook salmon, you visit www.skagitwatershed.org.
