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2019_Lake_Anundsjo: Downstream smolt migration in a Swedish lake
Coeck, J., Baeyens, R., De Maerteleire, N., Pieters, S. & Pauwels I.S. 2022. Smolt downstream migration in an hydropower lake (Bredbyn, Sweden). Fithydro project, INBO Belgium.
Contact: Pauwels, Ine

Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution 4.0 International License.

The researchers investigated the efficiency of smolt downstream migration in the lake that feeds the Anundsjo hydropower plant (Bredbyn, Sweden). Specifically the migration speeds and routes were evaluated and the predation risk was estimated. The lake contains a debris catcher and a fish guidance screen that should guide fish to a fish ladder that by-passes the hydropower plant. Sixty hatchery reared salmon smolts were surgically implanted with VEMCO V5 acoustic transmitters to study their downstream migration behavior. Forty of them were released in the river upstream of the lake and the hydropower plant and 20 smolts were released downstream of the hydropower plant in the residual flow of the lake. Only half of the released fishes reached the lake. Thirty five per cent of them entered the hydropower plant and were not observed downstream. The others were predated in the lake. None of the fishes found the entrance to the fish ladder. The results were used to advise local managers. more

The study was part of the FitHydro project (

Biology, Biology > Fish, Fisheries > Fish stocks/catches/taggings
Fresh water, Acoustic telemetry, Acoustic Telemetry, Acoustic tracking, Acoustic tracking systems, Animal tracking, Downstream migrations, Fish passability, Fish tracking, Freshwater lakes, Hydropower, Marine biotelemetry, Mitigation measures, Passage making, Risk mitigation, Smolts, Tracking data, Norrland, Salmo salar Linnaeus, 1758, Salmonidae Jarocki or Schinz, 1822

Geographical coverage
Norrland [Marine Regions]

Temporal coverage
February 2019 - July 2019

Taxonomic coverage
Salmo salar Linnaeus, 1758 [WoRMS]
Salmonidae Jarocki or Schinz, 1822 [WoRMS]

Fish detections Methodology
Fish detections: Acoustic telemetry

Vlaamse overheid; Beleidsdomein Omgeving; Instituut voor Natuur- en Bosonderzoek (INBO), moredata creator

Related datasets
Parent dataset:
European Tracking Network (ETN) data, more

Dataset status: Completed
Metadatarecord created: 2022-08-03
Information last updated: 2023-05-30
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