Scientists working on Lake Michigan and Lake Huron need diet information from trout, salmon, and walleye. The lakes have changed dramatically in recent years, in large part because of invasive species like the quagga mussel and round goby. Anglers, scientists, and fishery managers are trying to figure out what mix of salmon and trout species would be best for our changing lakes and the people who fish here. To do this they will be obtaining stomach samples from participating anglers.
You can find out more by going to, https://www.michiganseagrant.org/wp-content/uploads/2019/06/Huron-Michigan-Diet-Study-Instructions-2019-v2.pdf .