About the Cover
Cover: While O2 may limit the duration of a single dive during extended foraging bouts in king penguins (Aptenodytes patagonicus), more than 95% of all dives are performed by aerobic metabolism. If O2 does not limit the length of a dive bout what else could be limiting dive performance? Fahlman et al. (pp. 3344−3355) argue that elevated blood and tissue N2 tension, and thereby decompression sickness risk, may eventually limit the length of foraging bouts. Photo credit: Sébastien Durand.
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© The Company of Biologists Ltd 2007
