Indicator
Lahontan Cutthroat Trout
2015 Evaluation
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2015 Evaluation
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Status
Implemented
Rationale Details
Outcomes
Programs and Actions Implemented to Improve Conditions
In 2008, the U.S. Forest Service began implementing the Upper Truckee River Lahontan Cutthroat Trout Restoration Project downstream of the existing Meiss meadows population referred to as the “expansion area” (Lemmers 2015). Since 2008, the total number of non-native salmonids species in the expansion area continues to decrease, while LCT populations continue to show signs of successful reproduction and growth. Since 2012, total numbers of LCT have been declined likely as a result of drought and decreased stream flows (Lemmers 2015).

In 2002, the U.S. Fish and Wildlife Service introduced LCT to Fallen Leaf Lake in a pilot project to learn what conditions are necessary for successful restoration of LCT in a lake environment. In 2012, biologists observed successful reproduction in Fallen Leaf Lake’s tributary, Glen Alpine Creek (U.S. Fish and Wildlife Service 2013). Additionally, overwintering and multi-year survival has been recently documented. These observations are major milestones for the recovery of the species in the Tahoe Basin. While these results are positive, continuing challenges include adverse interactions with non-native species, including predation by lake trout (Salvelinus namaycush), hybridization with rainbow trout (Oncorhynchus mykiss), change in the food web, and competition for resources where non-native species are present (Allen, B.C. et al. 2003).

Nascent work toward reintroducing LCT into Lake Tahoe for recreational purposes began in summer 2011. The Nevada Department of Wildlife stocked approximately 22,000 LCT in Lake Tahoe as part of the work to begin stocking native aquatic species for the benefit of anglers. Additional research is needed to improve understanding of reintroduced LCT population dynamics and their interactions with non-native species (Al-Chokhachy and Peacock 2009).
Effectiveness of Programs and Actions
Based on observed successful reproduction of both the Upper Truckee River and Fallen Leaf Lake populations, it appears current projects have been initially successful in re-establishing self-sustaining populations of LCT. The health of these populations in upcoming years will determine the success of these projects.
Interim Target
Target Attainment Date
Recommendations
Analytic Approach
No changes recommended
Monitoring Approach
No changes recommended
Modification of the Threshold Standard or Indicator
Objective determination of “attainment” status for standards without a specific target is recurrent challenge both in the Region and in the larger field of monitoring and evaluation (M&E). The standard should be assessed against best practice for the establishment of standards and indicators for M&E, and amended as necessary to improve the evaluability of the standard and the information it provides for management.
Attain or Maintain Threshold
No changes recommended
Additional Figures and Resources

No photos available.

No documents available.