The negative utility of poultry lives seems to exceed the utility of human lives for the mean country.
Calculations
Negative utility of poultry lives as a fraction of the utility of human lives for the mean country: R = RN*RU = 1.95[1] (> 1).
- Ratio between the number of poultry birds and humans for the mean country: RN = 3.78.
- Negative utility per unit time of poultry life as a fraction of the utility per unit time of human life: RU = -UP/UH = 51.6 %.
Here's a chart of the amount of suffering caused by different animal foods that Brian Tomasik created. Farmed fish may have even more negative utility than chicken, since they are small and therefore require more animals per unit of meat. The chart is based on suffering per unit of edible food produced rather than suffering throughout the total population, and I'm not sure what the population of farmed fish is relative to the population of chickens. Chicken probably has more negative utility than fish if the chicken population is substantially higher than the farmed fish population. Beef is probably the meat with the lest negative utility.
Thanks for commenting! I am aware of that article, but you have just nudged me to make the calculation. Based on the Weighted Animal Welfare Index of Charity Entrepeneurship:
This suggests the negative utility of FF fish is: