Patterns of energy substrate utilization in overwintering painted turtles, Chrysemys picta

Potential sources of intra-population variation in the overwintering strategy of painted turtle (Chrysemys picta) hatchlings.

Many temperate animals spend half their lives in a non-active, overwintering state, and multiple adaptations have evolved to enable winter survival. One notable vertebrate model is Chrysemys picta, whose hatchlings display dichotomous overwintering strategies: some hatchlings spend their first winter aquatically after nest emergence in the autumn, whereas others overwinter terrestrially within ...

The physiology of hibernation among painted turtles: the midland painted turtle (Chrysemys picta marginata).

Midland painted turtles from Michigan were submerged at 3 degrees C in normoxic and anoxic water. In predive, and in turtles submerged for up to 150 days, plasma PO2, PCO2, pH, [Cl-], [Na+], [K+], total Mg, total Ca, lactate, glucose, and osmolality were measured; hematocrit and mass were determined, and plasma [HCO3-] was calculated. Anoxic turtles developed a severe metabolic acidosis, accumu...

Behavioral responses of hatchling painted turtles (Chrysemys picta ) and snapping turtles (Chelydra serpentina ) at subzero temperatures

We monitored behavioral responses of cold-acclimated hatchling painted turtles (Chrysemys picta ) indigenous to Nebraska and hatchling snapping turtles (Chelydra serpentina ) indigenous to Nebraska and Arkansas during cooling (0.18C/min) to temperatures as low as ÿ198C. All turtles made exploratory movements during cooling and locomotion occurred at temperatures as low as ÿ2 to ÿ48C, but C. pic...

Western Painted Turtle (Chrysemys picta bellii)

Egg Size, Incubation Temperature, and Posthatching Growth in Painted Turtles (Chrysemys picta)

Incubation temperature has profound and pervasive effects on phenotypes of developing embryos and offspring of oviparous reptiles (reviewed in Deeming and Ferguson, 1991). Perhaps the most compelling impact involves sex determination in many of these species. Indeed, this temperature-dependent sex determination (TSD) in reptiles has received considerable attention (reviewed in Bull, 1983; Ewert...