What percentage of the farmed tuna dies while in captivity?
In general the mortality rate of BFT reported during the farming/fattening season remains rather contained somewhat indicating the adaptability of the fish to survive in an enclosed area (i.e. captivity) and under normal culture conditions. Mortality appears to be in the range of 1-5 percent of the stocked fish. Spain and Libya reported higher mortality percentages. In the case of Spain this is possibly due to the fact that a large proportion of cultured BFT reaches the Spanish culture sites after long towing trips that may last over a month adding to the general stress of the confined fish.
