Map of the study area: Chotýšanka stream (Central Bohemia, Czech Republic); the dotted line represents the stretches where spraints of Eurasian otter Lutra lutra were found and collected in winter 2005/2006 (km 3.0–5.5 and 7.5–11.7 from the confluence with the Blanice River); the full line represents section limits; the triangles represent spots where fish stocking occurred in September–November 2005.