'They're actually the top predator': Invasive pickerel overruns a Nova Scotia park's waters

'They're actually the top predator': Invasive pickerel overruns a Nova Scotia park's waters

An aggressive invasive fish is altering the waterways at Kejimkujik National Park, and officials worry the consequences may extend well beyond its borders. Kejimkujik is one of Nova Scotia's best-known protected areas, and a multi-year fish census is showing a troubling situation for the park. Chain pickerel are now established in lakes and rivers that were once better known for brook trout and yellow perch, according to Global News. What's happ…