We do know that they are very prolific. If they're not treated, the population rebounds incredibly quickly. It takes about four or five years for larvae to mature into the adult phase where it goes out from the streams where they spawn, out into the lakes where they do their damage during the parasitic phase. They only live out in the lakes for about two years, but that's where they do all the damage. As I was saying before, each one kills about 18 kilograms of fish.
On February 10th, 2022. See this statement in context.