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What Are the Metabolic Rates of Cetaceans?

Kasting et al. (1989) purport to have verified that cetaceans have elevated metabolic rates, a conclusion disputed by Innes and Lavigne (1991). However, after reading Kasting et al.'s (1989) original article, Innes and Lavigne's (1991) comments, and Kasting's (1991) response, I wonder whether our knowledge of the metabolic rates of cetaceans, and the measurement thereof, has truly been advanced. The technique used by Kasting et al. (1989) to calculate the metabolic rates is theoretically correct, but its use in practice is fraught with error, while the method used by Innes and Lavigne (1991) is both theoretically and practically incorrect. These conclusions are based on my own experience measuring the metabolic rates of marine mammals and other species, and from studies of the dynamics of gas exchange in marine mammals.