Dissolved Oxygen?

Question

A mammal uses only 1 to 2 percent of its enegry in ventilation (breathing air in and out) while a fish must spend about 15 percent of its energy to move water over its gills. Explain this huge difference in their efforts to collect oxygen

Answer 1

This is not a certainty, but I would expect that it's due to air having a higher percentage of oxygen than water. The fish must have to move much more water over its gills than the amount of air a mammal must move into and out of its lungs to get the same amount of oxygen.

Answer 2

hi. desire you're great. Dissolved Oxygen: In aquatic environments, oxygen saturation is a relative diploma of the quantity of oxygen (O2) dissolved interior the water. Dissolved oxygen (DO) is measured in customary answer gadgets including millimoles O2 according to liter (mmol/L), milligrams O2 according to liter (mg/L), milliliter O2 according to liter (ml/L), or areas according to thousand (ppt). although, as interior the medical sense, oxygen saturation is calculated because of the fact the p.c. of DO relative to a theoretical optimum concentration given the temperature, stress, and salinity of the water. nicely-aerated water (in loose interchange with the air) will oftentimes be one hundred% saturated. customarily, the less warm the water the greater O2 it could dissolve, the greater saline the water the fewer O2 it could dissolve, and the decrease the atmospheric stress (e.g., the better the elevation), the fewer oxygen it could dissolve. those generalities come from the gasoline regulations of physics. thank you.