Zebra Mussel DNA Detected in Colorado River Near Moab

Fragments of invasive zebra mussel DNA have been detected in the Colorado River, raising alarms among state wildlife officials. The presence of this DNA was confirmed near Moab, Utah, a popular gateway to recreational areas along the river.

Zebra mussels are a highly destructive invasive species known for their ability to reproduce rapidly and form dense colonies. They can attach to hard surfaces, including water intake pipes, boat hulls, and docks, causing significant economic and ecological damage. Their filtration of water can also alter aquatic ecosystems by removing phytoplankton, which forms the base of the food web.

Utah Division of Wildlife Resources officials are now urging boaters and anglers to take strict precautions to prevent the potential spread of zebra mussels to other water bodies. This includes thoroughly cleaning, draining, and drying all boats and equipment before transporting them to a different location.

The discovery of zebra mussel DNA indicates that the mussels may be present in the waterway, even if adult specimens have not yet been found. Wildlife managers are concerned that the current could carry larvae or microscopic individuals downstream, potentially establishing new populations.

Specific protocols for boaters include:

• Cleaning: Inspecting and removing all visible mud, plants, and animals from boats, trailers, and equipment.
• Draining: Draining all water from bilges, live wells, motors, and bait buckets. Standing water can contain mussel larvae.
• Drying: Allowing boats and equipment to dry completely for at least five days after leaving the water. If immediate drying is not possible, washing with hot, high-pressure water is recommended.

The state has been actively monitoring for zebra mussels, which have already established populations in several other western states, including nearby states. The long-term ecological and economic impacts of an established zebra mussel population in the Colorado River could be substantial.

Further monitoring and potential management actions will be determined based on ongoing investigations into the extent of the potential infestation.