Food Web Interactions Associated with a Lahontan Cutthroat Trout Reintroduction Effort in an Alpine Lake
Project Number
04.01.01.0129
Action Priority
Conduct Applied Scientific Research
Implementers
U.S. Fish and Wildlife Service
Primary Contact
Roy Ulibarri (roy_ulibarri@fws.gov)
Stage
Completed
Duration
2009 - 2011
Science Program
Conduct Applied Scientific Research
To understand Fallen Leaf Lake food web interactions between nonnative species that prey on or compete with reintroduced LCT a combination of stomach content and stable isotope analyses was used to evaluate trophic characteristics within the aquatic species assemblage. LCT preyed on a variety of prey resources: mysid shrimp, insects, arthropods, signal crayfish and fishes. Diet overlap was greatest between L CT and Mountain Whitefish and both species exhibit a general feeding strategy that allows them to partition prey resources to avoid competitive interactions. Predation by Lake and Brown Tout on stocked LCT was observed and should be considered in the context of predator management.
Key Accomplishments
Accomplishments to be provided upon completion of project
Threshold Categories
Fisheries
Recreation
No Key Photo provided for this Project
Location
Expenditures
Expenditures by Funding Source to Date: $250,000 (Estimated Cost: $250,000)