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First published online July 2, 2004
Journal of Experimental Biology 207, 2889-2895 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.01124

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Lactate accumulation, glycogen depletion, and shell composition of hatchling turtles during simulated aquatic hibernation

Scott A. Reese^1,2,*, Gordon R. Ultsch² and Donald C. Jackson¹

¹ Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, Rhode Island, 02912, USA
² Department of Biological Sciences, University of Alabama, Tuscaloosa, Alabama, 35487, USA

View larger version (22K): [in a new window]   Fig. 1. (A) Whole-body [lactate] of hatchling Chelydra serpentina (circles), Chrysemys picta (squares) and Graptemys geographica (triangles) submerged in normoxic (open symbols) and anoxic (closed symbols) water at 3°C. (B) Whole-body glycogen of hatchling Chelydra serpentina (circles), Chrysemys picta (squares) and Graptemys geographica (triangles) submerged in normoxic water at 3°C. Glycogen levels were corrected via ANCOVA to a common mass (7.5 g). (C) As B for animals in anoxic water.

View larger version (28K): [in a new window]   Fig. 2. Relative values (mean ± S.E.M.) of shell, shell water, shell ash and shell organic content of hatchling Chelydra serpentina, Chrysemys picta and Graptemys geographica, and adult Chrysemys pict. Different symbols indicate a significant difference among species. Sample sizes are listed above the bars. Data for adult Chrysemys picta (% shell) are from Jackson et al. (1996) and shell composition from Jackson et al. (2000).

View larger version (10K): [in a new window]   Fig. 3. Shell CO2 mobilization (mmol) as a function of whole-body lactate (mmol) for hatchling Chelydra serpentina, Chrysemys picta and Graptemys geographica, and adult Chrysemys picta submerged in anoxic water at 3°C. Values are means ± S.E.M.; sample sizes are listed above the bars. Data for adult Chrysemys picta are from Warburton and Jackson (1995).