GEOLOGY WITH JEFF SIMPSON
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Scientists Solve Mystery of Mass Coho Salmon Deaths - A Chemical from Car Tires

12/3/2020

3 Comments

 
When officials in Seattle spent millions of dollars restoring the creeks along Puget Sound — tending to the vegetation, making the stream beds less muddy, building better homes for fish — they were thrilled to see coho salmon reappear.  But when it rained, more than half, sometimes all, of the coho in a creek would suffer a sudden death. These mysterious die-offs — an alarming  phenomenon that has been reported from Northern California to British Columbia — have stumped biologists and toxicologists for decades. Numerous tests ruled out pesticides, disease and other possible causes, such as hot temperatures and low dissolved oxygen. Now, after 20 years of investigation, researchers in Washington state, San Francisco and Los Angeles say they have found the culprit: a very poisonous yet little-known chemical related to a preservative used in car tires. - LA Times
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3 Comments
Kiersten Begley
12/6/2020 06:30:58 pm

This article was really interesting and I hope they find an alternative so the harmful compound that is in the tires!

Reply
Sarah L.
12/7/2020 08:25:21 am

That seems frustrating because after all that cleanup Seattle officials were trying to do to fix the creeks in Puget Sound, it turned out the Coho Salmon were dying from common tire chemicals. I think it is sad that we let this happen and I hope that something gets done about it such as finding something more eco-friendly to replace the tires that are killing these fish.

Reply
Prof Jeff
1/1/2021 06:34:32 pm

Thanks for your comments.

Reply



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