Improving growth rate allowed reaching harvest weight in a shorter period of time and had two major impacts: 1) improving growth rate increased the daily feed intake and consequently, the daily consumption of oxygen as well (Eq. (9)). When oxygen consumption increases, the farmers must stock less fish in a batch to avoid oxygen consumption to exceed the supply; 2) more batches can be produced. Improving growth rate decreased production per batch but increased the number of batches per year.