Naming. This record documents Mackinaw; the reviewed band was published under Lake trout. Worth knowing before you lean on the numbers — the closer a name is to a regional one or a subspecies, the more the band is a reasonable neighbour rather than the same fish.
The record files this fish as “Mackinaw (lake trout)”. That condition is the agency’s and it outranks anything on this drawing.
What the edges are. No cold edge published. Warm edge: measured upper avoidance. These are not one consistent quantity across species. A measured avoidance temperature is where fish were seen leaving; a water-quality maximum is a regulatory ceiling written to prevent a kill, and it sits well above the point a day gets difficult.
Source. Wismer & Christie 1987, GLFC Special Publication 87-3 (final preferenda from Coutant 1977a; growth range from Leidy & Jenkins 1977; avoidance from the same compilation). Read it.
Warmwater species swing their preference ten degrees or more between winter and summer in the same laboratory. One band per species is a summer simplification, and it is why the drawing shows a band rather than a line.