First time posting to this sub, I’m not sure if it entirely fits. However, I am extremely curious as the toxin in pufferfish is 1,200 times more poisonous then cyanide and has to be prepared in a very specific way to be rendered non-lethal.
While waiting to see if someone can field this one here, you might consider asking the same question over in r/AskAnthropology as well - the larger timescales they work with might bring an interesting perspective on a question like yours.