River | Aurland | Lærdal | Årdal | Fortun | Mørkrid |
---|---|---|---|---|---|
Catchment area (km2) | 804 | 1184 | 981 | 508 | 288 |
Mean annual discharge (m3 s−1) | 37.6 | 36.4 | 46.1 | 28.5 | 12 |
River length (km) | 10 | 25 | 30 | 16 | 9.5 |
Lake area (km2) | 1.9 | 0 | 7.5 | 0.62 | 0 |
Distance from river mouth to outermost receiver (km) | 160 | 167 | 181 | 209 | 209 |
Number smolts detected (%) | 69 (81) | 12 (63) | 42 (84) | 40 (80) | 12 (80) |
Number migrant smolts (%) | 37 (54) | 11 (92) | 22 (52) | 23 (58) | 7 (58) |
Total length (cm) (mean, range) | 20.1, 12 – 29 | 19.5, 12 – 27 | 15.6, 12 – 27 | 18.2, 11 – 26 | 19.6, 15 – 24 |
Fulton's K (mean ± SD (N)) | 0.80 ± 0.16 (34) | 0.78 ± 0.07 (6) | 0.79 ± 0.11 (10) | 0.86 ± 0.08 (16) | NA (0) |
N veteran migrant brown trout detected (%) | 85 (96) | 118 (98) | 76 (99) | 63 (91) | NA |
N migrant veteran brown trout (%) | 49 (58) | 63 (54) | 52 (68) | 41 (65) | NA |
N return to freshwater (%) | 41 (84) | 53 (84) | 45 (87) | 23 (56) | NA |
Total length (cm) (mean, range) | 39.9, 24 –76 | 44.3, 22 – 74 | 40.7, 25 – 69 | 48.9, 26 – 86 | NA |