Ontario's Ministry of Natural Resources is keeping an eye on fish.
Fisheries Management Biologist Steve Chong - with the Upper Great Lakes Management Unit, out of Sault Ste. Marie - explains Ministry officials were at last month's Wawa Salmon Derby to collect some data about the fish caught.
Chong adds they were also collecting tissue samples, stomachs, and other things that would indicate age, health, or diet of the fish, with the information to be used for "a number of" different things.
Chong says officials also took samples at other Ontario derbies, with similar efforts happening in the US, as part of a cross-border effort focusing on Lake Superior under the "Coordinated Science and Monitoring Initiative", which rotates between the Great Lakes each year.