https://iamafoodblog.com/fish-sauce/ this website says 3 parts fish to 1 part salt for a simple fish sauce.
https://en.wikipedia.org/wiki/Dressed_weight for chickens 75% of the live weight is edible
, and Cornish-crosses are generally 1.5 kg when slaughtered https://en.wikipedia.org/wiki/Broiler
http://fishcount.org.uk/studydatascreens/numbers-of-fish-caught-A0.php?sort2/full a Peruvian anchoveta weights between 10-29 grams
one slaughtered Cornish-cross produces 1,125 g of chicken flesh
one Peruvian anchoveta produces 13-39 grams of fish sauce
a gram of fish-sauce requires 29-87 times as many directly slaughtered animals as a gram of chicken (assuming we are ignoring animal feed, and the possibility they are using larger fish species)
I’m not finding any data on the number of neurons in anchovies/sardine/herring but If I did I still think neuron/body-weight is a better proxy for suffering capacity, considering the role of more neurons in managing a larger body.
My main worry is that efforts to popularize traditional Asian food will backfire, due to the use of fish sauce in many recipes, Peruvian anchovetas are the most heavily exploited vertebrate, and due to the high number of deaths needed per unit of food compared to other animals, a slight increase in anchovy consumption could easily outweigh any gains in cattle/pig/chicken etc. welfare. (though use of fishmeal as animal feed for chickens/pigs complicates this)
https://www.reddit.com/r/vegan/comments/n9tsnx/soybeans_are_grown_for_their_oil_we_only_feed_it/ any thing that increases soybean meal consumption (over other plant based foods) may be better then other foods because they would slightly raise the price of soybean meal for livestock owners (though this may just lead to the same number of animals being fed worse nutrition?) , conversely soybean oil, a byproduct of soybean meal, would ideally be avoided to avoid subsidizing animal feed
https://arstechnica.com/science/2013/05/when-it-comes-to-the-environment-conservatives-dont-like-conserving/ We know that American moderates and Conservatives are actively turned away by eco-conscious messaging, and will pay more for less environmentally friendly methods. Combine this with strange ideas of less resource demanding lifestyles as dictatorial conspiracies for control by a liberal elite in some sci-fi dystopia ” I will not live in a pod/ I will not eat the bugs/ soylent green is people ” , anti-PRC sentiment, Ideas about east-Asians people being more feminine/collectivist/passive then white-Americans, The estrogen myth, and the Idea that caring about others (and therefore eating plants) is unmasculine, any Organized effort to get Americans to eat more tofu will have to be done very carefully to avoid massive backfire.