Fig. 1.

Map of Aurland watercourse with the location of receivers (circles, triangles) deployed prior (blue) and post (green) tagging, the ‘Aurland 1’ high-head storage plant, ‘Vangen’ storage plant, and the flap weir and fish ladder at the outlet of Lake Vassbygdevatnet (red line). Two synchronization transmitters were placed with two of the receivers in the lake (triangles). Receivers are numbered between 1–22 for identification