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Environmental Assessment for the Reintroduction of Native Westslope Cutthroat Trout in Ruby Creek by Removal of Non-native Rainbow Trout with Electrofishing and Rotenone
Species Removal & Relocation - 05/17/2012

The enclosed Environmental Assessment (EA) has been prepared for the proposed Reintroduction of Native Westslope Cutthroat Trout in Ruby Creek by removal of Nonnative Rainbow Trout with Electrofishing and Rotenone. This project proposes to establish a genetically pure westslope cutthroat trout (WCT) population in approximately 9 miles of Ruby Creek, a tributary to the Madison River south of Ennis. The expected donor populations for the proposed project are the only two remaining aboriginal genetically pure WCT populations in the entire Madison Drainage, together occupying about 6 stream miles. The project would begin in August or September 2012. Prior to applying rotenone, electrofishing will be conducted throughout a significant portion of the Ruby Creek project area to physically capture and transfer rainbow trout to the Madison River. Only after this effort is completed would rotenone treatments to remove the remaining rainbow trout begin. A second rotenone treatment may be necessary in 2013 if all rainbow trout are not captured or removed in 2012. Upon successful completion of rainbow trout transfer or removal, eggs from the donor populations would be collected, fertilized on-site, reared in the private Sun Ranch Hatchery south of Ennis, and stocked in Ruby Creek either as eyed eggs or fry. Introductions will be conducted for at least two years, possibly more, pending the results of monitoring. Montana Fish, Wildlife & Parks invites you to comment on the attached proposal. The public comment period will be accepted until 5:00 p.m. June16, 2012. Comments should be sent to the following:

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Contact Information

Pat Clancey Fisheries Biologist Box 1336 Ennis, MT 59729 Or e-mail to pclancey@mt.gov