Abstract
The upstream migration of Atlantic salmon tagged with radio transmitters was analysed on a 6 km long stretch of the River Mandalselva (southern Norway), where the residual flow was 3 m3 s-1. Over a period of 40 days six artificial freshets were released. Two of the freshets lasted continuously for 48 hours and four of the freshets consisted of successive pulses of increased water discharge. There were significant differences in mean migration distance per hour between the freshet period, the 11 hour post-freshet period and the residual flow period for three of the freshets. However, no clear relationship between increased water flow and stimulated salmon migration was found.
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© 1998 Springer Science+Business Media Dordrecht
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Thorstad, E.B., Heggberget, T.G. (1998). Migration of adult Atlantic salmon (Salmo salar); the effects of artificial freshets. In: Lagardère, JP., Anras, ML.B., Claireaux, G. (eds) Advances in Invertebrates and Fish Telemetry. Developments in Hydrobiology, vol 130. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5090-3_38
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DOI: https://doi.org/10.1007/978-94-011-5090-3_38
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