New rounds of samples for the voracious creatures keep turning up positive, complicating containment The Colorado River is now officially “positive” for invasive zebra mussels for longer stretches in ...

Walleyes and perch taken from Minnesota lakes infested with zebra mussels contain starkly higher levels of mercury than those taken from uninvaded lakes, according to new University of Minnesota ...

Getting your Trinity Audio player ready... Water managers and state wildlife officials last year hoped the discovery of a microscopic zebra mussel larva in the Colorado River was a one-time event, not ...