Patterns of variation in glycogen, free glucose and lactate in organs of supercooled hatchling painted turtles (Chrysemys picta)
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چکیده
منابع مشابه
Patterns of variation in glycogen, free glucose and lactate in organs of supercooled hatchling painted turtles (Chrysemys picta).
Hatchling painted turtles (Chrysemys picta) typically spend their first winter of life in a shallow, subterranean hibernaculum (the natal nest), where they may be exposed for extended periods to ice and cold. The key to their survival seems to be to avoid freezing and to sustain a state of supercooling. As temperature declines below 0 degrees C, however, the heart of an unfrozen turtle beats pr...
متن کاملBehavioral 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...
متن کاملCold-Tolerance of Hatchling Painted Turtles (Chrysemys picta bellii) from the Southern Limit of Distribution
Painted turtles (Chrysemys picta) have a natural history unlike that of other chelonians from the northern United States and southern Canada. Although neonates of other freshwater turtles usually emerge from their subterranean nests in late summer or autumn and move to nearby marshes, lakes, or streams to spend their first winter, hatchling painted turtles typically remain inside their shallow ...
متن کاملSoil hydric characteristics and environmental ice nuclei influence supercooling capacity of hatchling painted turtles Chrysemys picta.
Hatchling painted turtles (Chrysemys picta) hibernate in their shallow natal nests where temperatures occasionally fall below -10 C during cold winters. Because the thermal limit of freeze tolerance in this species is approximately -4 C, hatchlings rely on supercooling to survive exposure to extreme cold. We investigated the influence of environmental ice nuclei on susceptibility to inoculative...
متن کاملSeasonal Temperature Variation in the Painted Turtle (chrysemys Picta)
We measured temperature variation in a free-ranging ectotherm by attaching microdataloggers to the carapaces of 34 painted turtles (Chrysemys picta) in a farm pond located in Davidson, NC. Water and mud temperatures (Tw) were simultaneously monitored. We successfully recorded external shell temperature (Ts) in 18 turtles from September 2001–April 2002 and 23 turtles from April 2002–October 2002...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 2005
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.01743