Fig. 1
From: Diverse environmental cues drive the size of reproductive aggregation in a rheophilic fish
Map of (a) position of studied location in the Czech Republic, (b) spawning and breeding ground and (c) detail of breeding grounds with the antenna deployment setup. White line depicts the occurrence of depth 3 m or lower. Antenna deployment setup: placement of antenna systems is indicated by solid black lines. Nets guiding asps into passing through the antennas are indicated by dotted lines. The migration further upstream (right side direction) is restricted by a weir (solid grey line) and reproduction occurs in the most fluvial part between the weir and the second antenna. We used QGIS software for the graphical visualization [82]