YES but not polar bears.
bear
bear
Grizzly and Black Bears eat berries during the summer and salmon in the fall. But that is not their total diet, they eat green vegetation, flowers, insects (ants, beetles, bees, moths, etc.), pine seeds, animals (ground squirrels, newborn elk, moose calves), carrion and garbage.
Bears, birds, voles.
Bears Especially Grizzly Bears, Black Bears, etc.
Yes omnivores do. When there is no plant to eat they eat meat or as you said salmon. Or vice versa. So technically you could say omnivores can live on almost anything...just like us humans. But you do seem to be referring to the behavior of bears.
In the summer, moose scavenge around for berries and roots to grow as large and strong as they can for mating season in the fall.
As a coastal people, they would have depended heavily on seafood. The most famous example is salmon, but shellfish, crab, halibut, ling cod, and even seals were also eaten. They also would have gathered great quantities of berries from the forest in Summer/Fall, such as salmonberry, huckleberry, salal berry, wild blackberry, wild raspberry, indian plum, crabapple, and others. They would have gathered wild greens such as stinging nettles, cattail shoots, and the like as well. Cattail roots and other tubers were a part of the diet, as were hazelnuts and other nuts. During the winter months, when food was more scarce, they would have hunted elk, deer, and black bear.
Salmon typically return to hatcheries during their spawning season, which can vary based on the specific species of salmon and their natural migration patterns. In general, salmon can return to hatcheries from late summer to early fall.
Mountain berries
Wild salmon is typically available from late spring to early fall, with the peak season being in the summer months. The specific availability can vary depending on the species and location of the catch. Wild salmon can be found fresh or frozen, depending on the time of year and region.
James J. Ames has written: '1977 Puget Sound summer-fall chinook methodology' -- subject(s): Salmon fisheries, Chinook salmon