Effects of regulated discharge on burbot migration
Burbot Lota lota movement and river discharge were studied in the Kootenai River, Idaho, U.S.A. and British Columbia, Canada, downstream of Libby Dam, Montana, U.S.A. A total of 24 adult burbot with transmitters were tracked from 1994 to 2000, for analysis of a travel distance of ≥5 km in ≤10 days t...
| Published in: | Journal of Fish Biology |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
2005
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/j.0022-1112.2005.00670.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.0022-1112.2005.00670.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.0022-1112.2005.00670.x |
| Summary: | Burbot Lota lota movement and river discharge were studied in the Kootenai River, Idaho, U.S.A. and British Columbia, Canada, downstream of Libby Dam, Montana, U.S.A. A total of 24 adult burbot with transmitters were tracked from 1994 to 2000, for analysis of a travel distance of ≥5 km in ≤10 days termed ‘stepwise movement’. Of 44 ‘stepwise movements’, significantly greater movements during pre‐spawning and spawning were observed when average daily discharges from Libby Dam were <300 m 3 s −1 , with a mean of 176 m 3 s −1 , similar to pre‐dam conditions. Burbot travelled at a greater rate during all seasons (3·36 km day −1 ) at discharges >300 m 3 s −1 (mean = 1·84 km day −1 ) than at discharges >300 m 3 s −1 but no difference was found for the pre‐spawning and spawning period. Burbot that started ‘stepwise movements’ in low discharge conditions frequently stopped during low discharges. |
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