Patterns of wintering of fire salamanders (Salamandra salamandra) in an artificial underground roost

Underground sites play a significant role in the life cycle of the fire salamander (Salamandra salamandra). Despite the known importance of such roosts during winter, there is still a lack of information on salamander biology inside such roosts. We studied the wintering of Salamandra salamandra from November 2011 to April 2012 in an artificial gallery near the village of Ticha Voda (eastern Slovakia) in a population composed predominantely by males. Their weight was higher at the end of December, though we did not record any significant weight change in females. On the other hand, mobility was significant in females, while the majority of males were immobile. We also observed a high frequency of changes in the position of wintering salamanders. Most individuals preferred a free position in the roost or a half-hidden position within crevices in the gallery walls.