A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Redds of brown trout in the deep channels of a hydroelectric power station (2020)
Syrjänen, J. T., Sivonen, K., Räihä, V., Kivinen, J., Sivonen, O., & Haapsalo, M. (2020). Redds of brown trout in the deep channels of a hydroelectric power station. River Research and Applications, 36(1), 183-186. https://doi.org/10.1002/rra.3568
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Syrjänen, Jukka T.; Sivonen, Kimmo; Räihä, Ville; Kivinen, Jouni; Sivonen, Olli; Haapsalo, Miska
Lehti tai sarja: River Research and Applications
ISSN: 1535-1459
eISSN: 1535-1467
Julkaisuvuosi: 2020
Volyymi: 36
Lehden numero: 1
Artikkelin sivunumerot: 183-186
Kustantaja: John Wiley & Sons Ltd.
Julkaisumaa: Britannia
Julkaisun kieli: englanti
DOI: https://doi.org/10.1002/rra.3568
Julkaisun avoin saatavuus: Ei avoin
Julkaisukanavan avoin saatavuus:
Tiivistelmä
Natural spawning redds of brown trout were surveyed for the first time in 1−6‐m deep urban channels of a hydroelectric power station (HEP) between two lakes in Finland, by scuba diving and wading. Before damming a century ago, thousands of lake migrating trout spawners ascended through the rapids to upstream spawning areas. Between 2015 and 2018, 11 trout redds were observed at depths of 250−340 cm; these may be the deepest reported in running waters. Nine redds were found at depths of 75−230 cm. The nearest redds were situated only 55 m upstream and 110 m downstream from the HEP inflow and outflow, respectively. Channel substrate and trout redds were dominated by particle size classes 32−64, 64−128, and 16−32 mm. The risk of diving in the area increased due to the high amount of litter on the riverbed. Observations of wild trout parr by local anglers provide evidence that natural spawning produces some fish in the HEP channels.
YSO-asiasanat: taimen; kutu; rakennettu ympäristö; kosket; vesivoimalat
Vapaat asiasanat: Finnish lake district; impounded river; scuba diving; Vaajanvirta rapids
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2020
JUFO-taso: 1