Researchers determine culprit after observing fish mysteriously decreasing in size: 'We don't even really know exactly how they managed'

Researchers determine culprit after observing fish mysteriously decreasing in size: 'We don't even really know exactly how they managed'

New research shows that an invasive fish species might be affecting the size of native trout in Canadian lakes.  What's happening? According to CBC News, lake trout in northern Ontario have been smaller in size in recent years. Scientists suspect that invasive rainbow smelt may be behind these changes.   University of Waterloo researcher Christian Therrien told CBC News that the consumption of rainbow smelt can cause heart problems and thiamine …