Initial Discovery of Golden Mussels
On October 17, 2024, the California Department of Water Resources (DWR) reported finding mussels attached to a float in the Port of Stockton.
These mussels were not observed during prior inspections of the float. Samples of the unknown species were promptly sent to the UC Davis Genomic Variation Laboratory and the California Department of Food and Agriculture (CDFA) laboratory for identification.
BAM in talks with Solano County Water District said they are working diligently to build more decontamination units ands place them around Lake Berryessa. As of Dec 1st there is one located at Steele Canyon. They are working to have one in place at Markley Resort very soon.
Gone Fishin’ Marine in Dixon is working with the Water District checking boats and suppling 30-day bands.
We will provide more info as it becomes available.
Schedule a boat decontamination here
Genetic Analysis Confirms Golden Mussels
By October 23 and 24, genetic analyses from UC Davis and CDFA confirmed the presence of golden mussels (Limnoperna fortunei). This invasive species, previously unknown in North America, represents a serious ecological and infrastructural threat.
Additional Findings in O’Neill Forebay
Additional Findings in O’Neill ForebayOn October 25, 2024, mussels were reported on artificial monitoring substrates in O’Neill Forebay, a site used for tracking quagga and zebra mussels. Specimens from this location are now en route to UC Davis and CDFA for further genetic analysis.
Why Golden Mussels Are a Concern
Golden mussels share similarities in appearance and biology with quagga and zebra mussels, but they pose unique risks. They can thrive in waters with lower calcium levels, enabling them to establish in a wider range of environments. Their dense colonization of hard surfaces can:
- Block municipal and industrial water intakes
- Require costly, ongoing biofouling removal
- Disrupt native species assemblages
- Degrade water quality
How Golden Mussels Were Likely Introduced
Golden mussels are native to rivers and creeks in China and Southeast Asia. Outside their native range, they are established in regions including Hong Kong, Japan, Taiwan, Brazil, Uruguay, Paraguay, and Argentina. In California, they were likely introduced by an international ship.
What’s Next?
The California Department of Fish and Wildlife (CDFW) will continue to share updates on detection and response efforts in the coming weeks and months. Immediate steps are being taken to inform water managers across California about this discovery.
How You Can Help
If you manage or operate water systems, it is critical to stay informed and monitor for signs of golden mussels. CDFW encourages proactive communication and preventive measures to reduce the risk of spread.
For more details, visit the CDFW News Archive.
Discover the ultimate resource for bass fishing enthusiasts with Bass Angler Magazine! Packed with expert tips, the latest cutting-edge techniques, and in-depth articles, our magazine is your go-to guide for mastering the art of bass fishing. Whether you’re a seasoned pro or just getting started, Bass Angler Magazine delivers the insights and inspiration you need to reel in the big ones. Subscribe today and elevate your angling game!
