As an auction buyer, lobsterman Samuel Tucker examines sow hake in the nearly empty warehouse before the fish auction at Great Diamond Island, Maine. (From the book What I Eat: Around the World in 80 Diets.) The caloric value of his day's worth of food in March was 3,800 kcals. He is 50; 6 feet 1 and 1/2 inches and 179 pounds. Catches are increasingly sparse, and today's will require only a half hour to auction.