Abstract
Movements of adult Atlantic salmon were tracked through a series of four fish passes and an impoundment on the River Conon system, Northern Scotland. Proportions of fish passing individual obstructions ranged from 63 to 100%. The cumulative effect was that only 4 of the 54 tagged fish reached the spawning areas. The fish were delayed for 1-41 days at a pool-and-overfall ladder and 1-52 days at a Borland fish lift. The fish swam through a 10 km long reservoir at 0.21-1.16 km.h(-1) . A total of 13 fish negotiated a 2.5 km long, 3 m diameter diversion tunnel through a mountain to their home river. High levels of electromyogram (EMG) activity were recorded during ascent of a pool-and-overfall fish ladder, indicating that high energy demanding burst swimming was required.
Original language | English |
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Pages (from-to) | 177-189 |
Number of pages | 13 |
Journal | Ecology of Freshwater Fish |
Volume | 12 |
Publication status | Published - 2003 |
Keywords
- salmon migration
- fish-pass complex
- radio telemetry
- electromyogram telemetry
- TRANSMITTED ELECTROMYOGRAM SIGNALS
- HYDROELECTRIC DAM
- TELEMETRY
- SALAR
- SYSTEM
- TROUT