Table 1.
Number of YOY and older juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) caught and their mean body length ± 1SD (BL, mm) during electrofishing in 10 different study sites of the Conon River
| Stream | W | M | P | Salmon YOY | Salmon > YOY | Trout YOY | Trout > YOY | RYOY | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | BL | n | BL | n | BL | n | BL | |||||
| 1. Allt Aradaidh | 2.1 | 10 | 2 | 71 | 47 ± 4 | – | 131 | 44 ± 6 | 145 | 102 ± 21 | 0.14 | |
| 2. Distillery Burn | 2.7 | – | 1 | 50 | 52 ± 5 | 2 | 125 ± 16 | 14 | 49 ± 5 | 64 | 136 ± 28 | 0.24 |
| 3. Gleann Chorainn | 3.7 | 22 | 2 | 279 | 49 ± 3 | 19 | 119 ± 6 | 3 | 54 ± 5 | 24 | 127 ± 22 | 0.74 |
| 4. Tuill Bhain | 2.6 | 38 | 1 | 208 | 44 ± 3 | 83 | 88 ± 14 | 23 | 41 ± 4 | 18 | 99 ± 27 | 0.61 |
| 5. Coire a Bhuic | 3.8 | 21 | 3 | 167 | 48 ± 6 | – | 8 | 45 ± 8 | 22 | 138 ± 19 | 0.81 | |
| 6. Am-fuar Alltan | 1.1 | 16 | 2 | 207 | 37 ± 3 | – | – | – | 1.00 | |||
| 7. Upper Meig | 1.5 | – | 2 | 140 | 40 ± 3 | 1 | 83 | 20 | 39 ± 4 | 41 | 113 ± 31 | 0.76 |
| 8. Chaisecain | 2.7 | – | 2 | 493 | 49 ± 4 | 6 | 146 ± 4 | 0 | 10 | 143 ± 27 | 0.98 | |
| 9. Scardroy Burn | 4.8 | – | 1 | 616 | 49 ± 4 | 33 | 110 ± 12 | 39 | 58 ± 4 | 16 | 118 ± 19 | 0.81 |
| 10. Glen Meinich | 5.4 | – | 2 | 208 | 48 ± 4 | 157 | 87 ± 15 | 1 | 48 | 10 | 133 ± 20 | 0.58 |
Mean stream width (W, m) and number of complete passes (P) of electrofishing is given. Location of upstream migration barrier (M, if present) is given in distance (m) upstream from nest. RYOY gives the ratio between “effective abundance” of YOY salmon and all salmonids (see “Materials and methods’)