Abstract
Diets of salmonids in a tributary of Lake Ontario were examined during the fall of 1977. Pacific salmon eggs accounted for at least 90% of the October diet of juvenile steelhead and coho salmon, and adult brook trout and brown trout. In November, salmon eggs comprised 38-95% of the diet. Egg consumption appeared to be responsible for large increases in the condition factor of all groups studied. Increased condition may enhance survival during the severe winters characteristic of the Tug Hill region.