Blood
About 98.5% of the oxygen in a sample of arterial blood in a healthy human breathing air at sea-level pressure is chemically combined with the hemoglobin. About 1.5% is physically dissolved in the other blood liquids and not connected to hemoglobin. The hemoglobin molecule is the primary transporter of oxygen in mammals and many other species (for exceptions, see below). Hemoglobin has an oxygen binding capacity between 1.36 and 1.40 ml O per gram hemoglobin, which increases the total blood oxygen capacity seventyfold, compared to if oxygen solely were carried by its solubility of 0.03 ml O per liter blood per mm Hg partial pressure of oxygen (about 100 mm Hg in arteries).
Livewell
Dissolved oxygen is the single most important factor for keeping bass alive, and an understanding of factors that affect oxygen levels will better enable anglers to keep their fish [aquatic animals] alive. At a moderate water temperature of 70˚F, 100 percent oxygen saturation is 8.8 mg/l of oxygen, whereas at the higher temperature of 80˚F, 100 percent saturation is 7.9 mg/l. Both of these 100 percent saturation oxygen levels are suitable for keeping bass alive.
Without injecting oxygen into the livewell, it is very difficult to supply enough oxygen to keep alive heavier tournament limits.
Oxygen injection has long been used by Texas Parks and Wildlife Department (TPWD) hatcheries to maintain the health of fish being stocked into reservoirs. Fisheries staff regularly transport or hold fish in ratios equal to or greater than one pound of fish to a gallon of water. However, boat manufactures do not offer oxygen injection system options…
Proper installation and operation of an oxygen injection system will ensure oxygen levels remain above the preferred level of 7 mg/l even when livewells contain heavy limits.