Current distribution of the Alpine Marmot (Marmota marmota) in the Nízke Tatry Mts., Slovakia (Rodentia: Sciuridae) [Súčasné rozšírenie svišťa vrchovského (Marmota marmota) v Nízkych Tatrách (Rodentia: Sciuridae)]
Altogether 1592 marmot burrows were recorded in the Nízke Tatry Mts. and their altitude was measured using GPS equipment. 21 colonies were found on the northern and 19 colonies on the southern side of the main mountain range. Three burrow systems (colonies) were abandoned, the rest was composed of active colonies. The mean altitude of the burrows was 1759.0 m a. s. l.; that on the northern side being 1727.4 m and that on the southern side 1783.3 m. The minimum altitude of the burrow position was 1594 m a. s. l., the maximum altitude was 1991 m a. s. l. (range 397 m). The highest frequency of burrow occurrence was found between 1700 and 1799 m a. s. l. (n=782; 49.54%). The density of colonies per 100 hectares reached 0.25 at the altitudinal level of 1701–1799 m a. s. l. The largest area occupied by one colony was 17.68 ha and the highest number of burrows was 160 in one colony, while the smallest colony had only 5 burrows. The most frequent colony area was ≤1 ha (44.7%), although the mean area was 2.68 ha.