Quoted: Another factor working in the Montana researchers’ favor was the fortuitous and improbable fact that they seemed to have found the very individuals that had been introduced, rather than their offspring, says Jake Vander Zanden, an ecologist at the University of Wisconsin-Madison who studies aquatic invasive species.
“Typically when you discover a new population of what might be considered an invasive species, you’re not going to capture the individuals that were themselves transported,” Vander Zanden says. He calls the otolith findings “pretty striking.”