PLEASE ANSWER ALL PARTS OF THE WUESTIOM INCLUDE ALL CALCULATIONS TO SUPPORT You have been hired as a scientific adviser to a major Hollywood studio and asked to design aquadog (Canis aquaticus) - Aquaman's best friend - which, like its master, can breathe both air and water. You are given full artistic ticense regarding how the pooch can look, but you have to make the concept scientifically feasible.
Start by explaining to your boss why aquadog's lungs could not function effectively in aquatic respiration, and therefore why it would require a separate water-breathing organ (WBO). Then, design an effective WBO of this imaginaly canine and explain how it works in gas exchange. Include a clearly labelled diagram.
You may endow the animal is with any autapomorphies, or "go back" in evolution, without worrying or explaining how these structures might have (d)evolved. Make sure that the gas exchange capacity of the WBO is sufficient to match the animals metabolic rate. Use reasonable values from lecture slides, textbook and/or research articles to make sure that your numbers add up in designing aquadog's WBO. If it had its choice of aquatic habitat, where would aquadog live, and why? How would aquadog ventilate its WBO? How would this mechanism differ from air breathing? Using a reasonable value for
O_(2) extraction efficiency, what should be the
V_(\epsi ). of the WBO?
Apart from gas exchange issues, what other_regulatory problem would aquadog have to solve before it could really survive breathing water?
When you collect your Oscar for scientifically accurate movie-making, make sure to include thanks to CSUSB and Comparative Animal Physiology in your speech.
