YCT Multi-state Assessment 



February 10, 2003 



Restoration Activity 



Riparian restoration 



Diversion modification 



Barrier removal 



JBarrier construction 

 ICulvert replacement 



Installation of fish screens to prevent loss 



JFish ladders to provide access 



[Spawning habitat enhancement 

 jWoody debris placement 

 fPool development 



[increase irrigation efficiency 



Grade control 



Instream cover habitat 



Re-founding pure population 

 Other 



Riparian fencing 



Physical removal of competing/hybridizing species 



Chemical removal of competing/hybridizing species 

 Public outreach efforts at site (Interpretative site) 

 Population Restoration/Expansion 

 [Angling Regulations 



Table 1 1 . Land-use and angling activities that might impact a population segment. 



Change in Focus 



At this point the assessment will change from the focus on population mapping units (segments) 

 to a level of assessment related to populations and the risks that influence the well-being of the 

 identified populations. At this point, a detennination will be made relative to which population 

 mapping units have a conservation objective and which will be assigned to a recreational fishery 

 objective. Those segments identified as having a recreational objective, only, will not be carried 

 forward in the genetic and population risk assessments. Population mapping units having a 

 conservation objective will be further sub-divided based on connectedness or isolation into meta- 

 populations or isolated populations (isolates). Both meta-populations and isolates can serve as 



Page - 55 



