1. Michigan’s Great Lakes Research Fleet Research Vessel “Chinook”, Lake Huron Research Vessel “Steelhead”, Lake Michigan Research Vessel “Channel Cat”, Lake ErieResearch Vessel “Judy”, Lake Superior

2. Zebra and quagga mussels have fundamentally changed the ecology of the Great Lakes

3. Dams prevent Great Lakes fish from reaching traditional spawning sites in tributaries. Thus, trout and salmon fisheries in lakes Huron and Michigan must be supported by stocking.

4. Lake Huron streams still assessable to Great Lakes fish for spawning: The streams shown in blue are still assessable Streams shown in red are blocked by dams Only the colder streams are suitable for trout and salmon; of these, only 3% remain assessable.

5. Saginaw River system and major dams: Only streams shown in yellow are accessible to walleyes and sturgeon for spawning

6. Alewife littered beaches During the 1960s Lake Michigan