But painted turtles, like a few other vertebrates, have freeze tolerance; they can survive temperatures to 18 F and the freezing of 53% of their body water. For days, even weeks, they will stop breathing, their hearts will stop beating, and their blood will cease to flow. Then, as the ground warms up again come spring, they will begin to move.
Of course, all fresh water turtles hibernate during the winter. They dig themselves into the mud in the fall, sometimes up to a foot and half beneath the bottom of a pond. Even with all the water frozen above, the mud temperature might be as high as 42F. Hibernation can last up to six months, six months without drawing a breath. They have nonpulmonary respiration, which allows them to absorb oxygen through their skin and release CO2 the same way. Otherwise, they are in “metabolic depression,” using such a small amount of energy that they experience little if any weight loss.
***
Writes Carroll, "We are thought strange to ask for quiet in our own name and stranger yet to ask it on behalf of the marsh."
UPDATE: found this good site about local herps.
1 comment:
In some animals it is unique sugar compounds that help their cells avoid the destructive effects of ice formation in winter. Sugar, good for so many things. But don't drink the antifreeze!
Post a Comment