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Spawning migration behavior of salmon and sea trout in the Tornionjoki river system : Interim report 2018-2019


ISBN-13:978-952-380-073-1 
Julkaisu nro / vuosi:78/2020 
Julkaisusarja:Luonnonvara- ja biotalouden tutkimus 
Kieli:englanti 
Kustantaja:Luonnonvarakeskus 
Sidosasu:pehmeäkantinen 
Sivumäärä:32 
Tekijät:"Riina Huusko, Mikko Jaukkuri, Gustav Hellström, Linda Söderberg, Stefan Palm and Atso Romakkaniemi"  

39.00 €

Tornionjoki salmon and sea trout are closely monitored annually with multiple methods. Despite extensive data collection, some fundamental knowledge of the Tornionjoki salmon and sea trout relevant for modern adaptive salmon management is still lacking. Specifically, the in-river migratory behavior and survival of both pre- and post-spawning salmon and sea trout, as well as the distribution of spawning sites, are not well known. In addition, recent observations of sick and dying salmon in the Tornionjoki system, and declining returns reported from many rivers in connection with these observations, are concerning. More knowledge about how the disease symptoms affect behavior and survival of the Tornionjoki salmon is therefore needed.


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