Salmon meat would be so abundant, and so desirable, that people would gorge on 100% meat for weeks at a time, and then become seriously ill, or even die.
Sounds like Zhanna needed some animal protein and chocolate candy bars!
Moderation and diversification, tried and true principles.
Settlers would also die of rabbit starvation. Rabbit meat is very lean, and you need a minimum amount of fat.
https://en.m.wikipedia.org/wiki/Protein_poisoning