Aquaculture and Fisheries Commons^™

Analyzing The Diet Composition Of Lake Trout (Salvelinus Namaycush) In Upper Priest Lake, Coty W. Jasper

EWU Masters Thesis Collection

Lake Trout (Salvelinus namaycush) were intentionally introduced to the Priest Lake system in 1925 with the intentions of creating a recreational fishery. As the Lake Trout population increased within this system, the native Bull Trout (Salvelinus confluentus) population began to decline. Possible negative impacts of Lake Trout on Bull Trout include direct effects such as predation, or indirect effects, such as resource competition. In this study our objective was to estimate the frequency of piscivory of Lake Trout from Upper Priest Lake and document any possible Lake Trout predation upon Bull Trout in the Upper Priest Lake system. We obtained …