| Impact ID | 7780 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta) were deemed at least partially responsible for the extirpation of Arctic grayling (Thymallus arcticus) in Michigan, its only known location in the Great Lakes basin. |
| Reference | 16494 |
| Cost | |
| Location | Michigan, USA |