Literaturdatenbank
Literaturdatenbank |
|
 |
|
Madsen, J. G., Wang, T., Beedholm, K., & Madsen, P. T. (2013). Detecting spring after a long winter: Coma or slow vigilance in cold, hypoxic turtles? Biology Letters, 9(6), 20130602.
Added by: Admin (06 Jan 2014 18:24:55 UTC) |
| Resource type: Journal Article DOI: 10.1098/rsbl.2013.0602 BibTeX citation key: Madsen2013 View all bibliographic details  |
Categories: General Keywords: Emydidae, Physiologie - physiology, Schildkröten - turtles + tortoises, Trachemys scripta Creators: Beedholm, Madsen, Madsen, Wang Collection: Biology Letters |
Views: 2/618
Views index: 16% Popularity index: 4% |
| Abstract |
|
Trachemys scripta elegans 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.
Added by: Admin |