Blood gases are a difficult variable to measure. Unlike heart rate, for example, which can be obtained with a simple electrode contact to the skin, the animal must be catheterized to measure blood gases. This is always a complex procedure in aquatic animals, and sampling while free-diving adds further great complications. Recently, blood gases have been obtained during dives of Weddell seals. This was done by means of a microprocessor-controlled sampling array. It is a major innovation in the study of the physiology of diving. Some of the LA and glucose results were presented in Chapter 8; the blood gas results are discussed below.
KeywordsGentoo Penguin Weddell Seal Freshwater Turtle Bohr Effect Northern Elephant Seal
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