4.2.2 Description of canning tuna in brine. The description is related to canning plant with a capacity of 20 tons whole raw fish (bluefin or yellowfin tuna) per 8 hours. The overall yield is approximately 50-55% which gives approximately 10 000 450 g (1 pound) cans or 20 000 225 g (1/2 pound) cans per 8 hours.