Non-native shad were introduced in the Columbia River more than a century ago and have prospered, with recent annual runs in the vicinity of 2 million. To a limited extent, they help fill the role huge salmon runs once did of bringing important trace elements from the ocean into upstream areas.
Columbia Basin Bulletin
Non-native shad were introduced in the Columbia River more than a century ago and have prospered, with recent annual runs in the vicinity of 2 million. To a limited extent, they help fill the role huge salmon runs once did of bringing important trace elements from the ocean into upstream areas.
MATT WINTERS COLLECTIONCOLUMBIA RIVER — A non-native anadromous — or ocean-going — fish now provides as much marine-derived nutrients, such as phosphorus and nitrogen, in the Lower Columbia River as do native salmon.
While the numbers of salmon and steelhead have declined over the past century, the number of American shad has risen significantly, particularly after the construction of The Dalles Dam, which removed a barrier — Celilo Falls — to the shad’s upriver migration.
Sign up to receive news directly to your desktop. Click the bell icon in the nav bar, at any time to change your settings.
Get up-to-the-minute news sent straight to your device.
Receive our top stories in your inbox each morning.
Success! An email has been sent to with a link to confirm list signup.
Error! There was an error processing your request.
Thank you .
Your account has been registered, and you are now logged in.
Check your email for details.
Submitting this form below will send a message to your email with a link to change your password.
An email message containing instructions on how to reset your password has been sent to the e-mail address listed on your account.
No promotional rates found.
Thank you.
Your gift purchase was successful! Your purchase was successful, and you are now logged in.
| Rate: | |
| Begins: | |
| Transaction ID: |
A receipt was sent to your email.
(0) comments
Welcome to the discussion.
Log In
Keep it Clean. Please avoid obscene, vulgar, lewd, racist or sexually-oriented language.
PLEASE TURN OFF YOUR CAPS LOCK.
Don't Threaten. Threats of harming another person will not be tolerated.
Be Truthful. Don't knowingly lie about anyone or anything.
Be Nice. No racism, sexism or any sort of -ism that is degrading to another person.
Be Proactive. Use the 'Report' link on each comment to let us know of abusive posts.
Share with Us. We'd love to hear eyewitness accounts, the history behind an article.