Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
Detecting spring after a long winter : coma or slow vigilance in cold, hypoxic turtles? / Madsen, Jesper G; Wang, Tobias; Beedholm, Kristian; Madsen, Peter T.
In: Biology Letters, Vol. 9, No. 6, 2013, p. 20130602.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
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TY - JOUR
T1 - Detecting spring after a long winter
T2 - coma or slow vigilance in cold, hypoxic turtles?
AU - Madsen, Jesper G
AU - Wang, Tobias
AU - Beedholm, Kristian
AU - Madsen, Peter T
PY - 2013
Y1 - 2013
N2 - Many freshwater turtle species can spend the winter submerged in ice-covered lakes by lowering their metabolism, and it has been proposed that such severe metabolic depression render these turtles comatose. This raises the question of how they can detect the arrival of spring and respond in a sensible way to sensory information during hibernation. Using evoked potentials from cold or hypoxic turtles exposed to vibration and light, we show that hibernating turtles maintain neural responsiveness to light stimuli during prolonged hypoxia. Furthermore, turtles held under hibernation conditions for 14 days increase their activity when exposed to light or elevated temperatures, but not to vibration or increased oxygen. It is concluded that hibernating turtles are not comatose, but remain vigilant during overwintering in cold hypoxia, allowing them to respond to the coming of spring and to adjust their behaviour to specific sensory inputs.
AB - Many freshwater turtle species can spend the winter submerged in ice-covered lakes by lowering their metabolism, and it has been proposed that such severe metabolic depression render these turtles comatose. This raises the question of how they can detect the arrival of spring and respond in a sensible way to sensory information during hibernation. Using evoked potentials from cold or hypoxic turtles exposed to vibration and light, we show that hibernating turtles maintain neural responsiveness to light stimuli during prolonged hypoxia. Furthermore, turtles held under hibernation conditions for 14 days increase their activity when exposed to light or elevated temperatures, but not to vibration or increased oxygen. It is concluded that hibernating turtles are not comatose, but remain vigilant during overwintering in cold hypoxia, allowing them to respond to the coming of spring and to adjust their behaviour to specific sensory inputs.
U2 - 10.1098/rsbl.2013.0602
DO - 10.1098/rsbl.2013.0602
M3 - Journal article
C2 - 24108677
VL - 9
SP - 20130602
JO - Biology Letters
JF - Biology Letters
SN - 1744-9561
IS - 6
ER -