Are you asking how many pounds one would need? Unknown....they only take the brain and eggs though, to sustain it on ONLY salmon it'd need probably a few dozen pounds of that per day(like 30+ pounds, more depending on the size of the bear and how much it moves about). However it certainly wouldn't be the best diet if they're ONLY living on that, and probably bad for them to just have that too.

They actually get most of their carbs from nuts, fruits, grasses and berries than they do from meat. Oh, and bugs, moths are big for them. Those teeth say carnivore, but their diets say omnivore leaning more towards bugs and vegetation of all kinds than meat.