Salmon Spawn

Salmon Spawn. Informative details about the how and why of spawning salmon. Plus see our video clip of coho salmon leaping in the Sol Duc River, within the Olympic National Park.

Salmon Life Cycle Overview

Imagine a fish species that begins life in fresh water, migrates to the salty ocean for years, and then overcomes all odds to return to the exact gravelly stream of its birth many years later to spawn and die.

(Below: Pacific salmon enroute to their spawning beds. Image by Flickr user: USFWS Pacific / Creative Commons)

Salmon spawn - salmon are leaping waterfall

The salmon spawn is one of those very nearly inexplicable events, yet this same amazing event occurs every year as though (unbelievably) a Creator might actually be caring for and nurturing Nature.

Here's what we mean:

  • The fry are born in shallow freshwater streams.
  • Within a few weeks to a few years after hatching, young salmon migrate down river to the ocean
  • They spend a short season at the mouths of their natal rivers as their bodies make the physiological changes required for life in the salty ocean
  • They live for 4-7 more years in the ocean before they once again return to the very stream in which they were born which may be thousands of miles away.
  • Salmon are a keystone species - their dead bodies provide nutrients for both the flora and fauna in the riparian environments surrounding the salmon spawning streams as well as downstream in estuaries.

For greater detail about the Salmon Life Cycle, click here

For more information about types of Pacific Salmon, click here


Opportunities to view
spawning salmon abound throughout the
beautiful Pacific Northwest

Were you to visit and view the spawning salmon in action, it might look something like the pictures on this page.

Additionally, here is a clip of salmon struggling to leap the Sol Duc Salmon Cascade during the 2012 Coho Salmon run.





How do the salmon know how to
get back to their birth stream?

While the exact mechanisms that guide the salmon are not clearly understood, it is believed that their guidance systems may be a combination of sensitivity to the earth’s magnetic field and their sense of smell, which is very strong.

Scientists think the earth’s magnetic signals (magnetoception) guide the salmon to the general position of the river where they were born. As they approach, they follow the scents pouring out of their natal stream, finding the entrance to the river and the exact tributary and stream in which they were born.

(Below: These salmon have arrived at their natal spawning grounds in Issaquah Creek, WA, and will soon pair up, dig redds and complete their spawn. Image by Flickr user: http://www.flickr.com/photos/soggydan/4041052559/ - Creative Commons)

Hundreds of spawning salmon in Issaquah Creek

Salmon don’t always end up in their exact birth stream 100% of the time, studies show. A few salmon may end up in a nearby stream, thereby helping to ensure sufficient genetic diversity of the species. It also ensures that creeks with disrupted environments will eventually become repopulated with new runs of salmon.

Salmon are a Keystone Species

Salmon are North America's answer to the Serengeti's wildebeest

“Salmon continue to surprise us, showing us new ways in which their oceanic migrations eventually permeate entire terrestrial ecosystems. In terms of providing food and nutrients to a whole food web, we like to think of them as North America's answer to the Serengeti's wildebeest” (Science Daily 2008).

Salmon are known as a keystone species, because the entire ecosystem around the salmon spawning streams is dependent upon the nourishment that salmon provide. The ocean nutrients, nitrogen, sulfur, carbon and phosphorus, are transferred to the forest and its inhabitants upon the death of the salmon each year.

(Below: A multitude of bright red spawning salmon are engrossed in their spawning activities in the same gravel stream bed where they hatched many years earlier. Image by Flickr user: http://www.flickr.com/photos/earth_and_env/2847067154/ - Creative Commons)

A multitude of bright red spawning salmon are engrossed in their spawning activities in the same gravel stream bed where they hatched many years earlier.

Just 2% of the salmon eggs deposited survive the many years and hazards of life, managing to return to the stream where they were born to spawn and repeat the cycle.

Many are the ways that salmon fall prey:

  • Cutthroat and steelhead trout lurk in the area long enough to make meals of salmon roe.
  • Dippers (small birds) and gulls dine on roe.
  • Many predators depend on salmon. Seals and sea lions, grizzlies, black bears, bald eagles and other bird species, mink, otters, raccoons, fox, and man are some of the main predators of salmon at various stages of life. Wolves prefer salmon over deer during the salmon spawn

(Below: A young bald eagle eagerly tugs at a dead salmon. Image by Flickr user: http://www.flickr.com/photos/jitze1942/4925977474/ - Creative Commons)

Salmon Spawn. Juvenile bald eagle feasting on dead salmon

Upon their death at the completion of the salmon spawn, the nutrients from the many dead salmon nourish every species within the environments surrounding the spawning beds. Birds and other animals drag salmon carcasses hundreds of feet into the forest. One study demonstrated that bears may leave up to half of their salmon harvest unconsumed on the forest floor. Their scat fertilizes the brush and trees.

Additionally, the nutrients drift downstream into estuaries for the nourishment of other species of breeding birds. The number of birds nesting in the spring is strongly correlated to the strength of the salmon run during the prior fall.

Should the salmon spawn terminate, the absence of salmon would create an environmental disaster for nearly the entire ecosystem.

Here is how you can enjoy a Salmon Spawn carefully:

  1. If you’re simply viewing or photographing the salmon, know that they have great eyesight. You’ll get better views by wearing muted tones or camo colors.
  2. Cut the glare off the water by using polarized sunglasses. It will also keep your eyes from tiring quickly.
  3. Go higher young man (or woman). Finding higher viewing areas may improve your ability to witness the salmon spawn in action, especially if you also have your binoculars or a camera’s telephoto lens.
  4. Allow the spawning salmon to go about their business, undisturbed by litter, dogs, or excessive commotion.
  5. If you’ve come to fish for salmon, look for salmon in the early stages of their salmon run – in the deeper wider waters of the river, in the mouth of the river, or still in the Pacific not far from the mouth of the river. At this point, salmon are at their peak condition and still silvery in appearance.
  6. Learn more about the salmon spawn by doing your homework. www.BeautifulPacificNorthwest.com provides this overview of spawning salmon and of salmon species and their lifecycles to help you better appreciate the awe of Nature and of the beauty and uniqueness of the Pacific Northwest.

If you have opportunity, we recommend visiting a Park’s Visitor Center to take advantage of additional interactive educational programs or materials.

(Below: Spawning salmon. Image by Flickr user: http://www.flickr.com/photos/soggydan/4041794152/ - Creative Commons)

Brightly colored spawning male salmon

References:

  1. http://www.mgfalaska.com/salmon-spawning.html
  2. http://en.wikipedia.org/wiki/Salmon_run
  3. http://www.goldstreampark.com/salmon.htm
  4. http://academic.evergreen.edu/curricular/ftts/downloads/chumsalmon2pg.pdf
  5. http://www.ecy.wa.gov/programs/sea/pugetsound/species/salmon_cyc.html
  6. http://en.wikipedia.org/wiki/Salmon
  7. http://en.wikipedia.org/wiki/Trout


Go from Salmon Spawn to Washington Rain Forest

Go from Salmon Spawn to Beautiful Pacific Northwest Home Page

Protected by Copyscape Plagiarism Checking Tool
Protected by Copyscape Plagiarism Checking Tool

Excellent 2013 Dungeness River Salmon Spawn!

Imagine a wide but shallow streambed filled with spawning salmon! The 2013 salmon spawn was reported to be the best in years - they were nearly bank to bank!

When the salmon run, there is easy viewing at various spots along the Dungeness River.

More info on the
salmon spawn here
.


Below: The 2013 salmon run photo below was taken from the Old Olympic Highway bridge over the Dungeness River.

The Dungeness River is full of spawning salmon in September 2013

~~~~~~~


Below: a view of downtown Port Angeles from the top of the Laurel Street stairs. The Coho ferry has just left the dock bound for Victoria BC.

A view of downtown Port Angeles from the top of the Laurel Street stairs. The Coho Ferry has just left the dock bound for Victoria BC.

Beautiful
Pacific Northwest Photo Info

Mount Baker

Beyond the Dungeness Spit and across the blue expanse of the Strait of Juan de Fuca is the snow-capped Mount Baker and the Cascade Mountain Range northeast of Seattle, WA.