I think the value of fish as a survival food depends on where you are. Bass and other non-oily fish have about 125 calories per 3.5 ounces, compared with 250 calories for grouse meat, and 400 for venison. There are only a few options in the boreal forest for much of the year unless you have a gun and ammo.
I have been recalling the story of a colleague of mine who was working in Siberia under winter conditions obtaining mammoth fossils. Their staple was reindeer, but the reindeer meat had to be supplemented by local fish, which provided the necessary fat. Must not have been bass, I guess.
The moral of these stories must be that you had better have pretty specific knowledge of the available foods if you are out for a long time.
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