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First published online August 3, 2006
Journal of Experimental Biology 209, 3164-3169 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02366

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The energetic consequences of dietary specialization in populations of the garter snake, Thamnophis elegans

E. J. Britt^*, J. W. Hicks and A. F. Bennett

Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA

View larger version (24K): [in a new window]   Fig. 1. The time course in oxygen consumption (ml O2 h-1 g-1) between coastal (open circles) and inland (closed circles) T. elegans on a lyophilized fish diet (A) and slug diet (B). The standard metabolic rates of coastal specialist snakes and inland generalist snakes were 0.058 ml O2 h-1 g-1 and 0.70 ml O2 h-1 g-1 at 30±1°C, respectively (P=0.07). Each data point represents the mean metabolic value of a group of snakes. The total energy devoted to SDA was calculated for each snake by subtracting SMR from total metabolic rates during digestion. Postprandial metabolic rates reached maximal levels of 3.0- to 4.0-fold resting rates and lasted nearly 80-110 h.