Seasonality of Freeze Tolerance in a Subarctic Population of the Wood Frog, Rana sylvatica
Figure 1
Variation in liver glycogen concentration (μmol glucosyl units g−1 dry tissue) associated with experimental freezing () and thawing () of winter and spring wood frogs. A mean identified by an asterisk differed () from the corresponding mean for unfrozen frogs (). A dagger indicates that the mean for spring frogs differed () from the corresponding mean for winter frogs. Data from winter frogs were initially reported in Costanzo et al. [10].
