Viktor Finnäs

Viktor Finnäs
Åbo Akademi University · Department of Biosciences

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4
Publications
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9
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Introduction
My main research interest lies within the field of otolith microchemistry and its applictions to study the migration, provenance and composition of fish stocks in the Baltic Sea.

Publications

Publications (4)
Article
Full-text available
Strontium concentrations are low in fresh waters compared to seawaters. Therefore, wild‐born river‐spawning and stocked freshwater‐reared whitefish Coregonus lavaretus L. display regions with low concentrations of strontium in the centre of their otoliths. Strontium in otoliths from wild‐born river‐spawning whitefish ascending the River Tornionjoki...
Article
The elemental composition of otoliths provides historical information on migration and provenance of fish. Due to the complex structure of the otoliths, the depth from which the elemental information originates has to be considered. In this work, three analytical methods often used to assess otolith chemistry are compared. The information depths ar...
Article
Full-text available
Micro X‐ray fluorescence (µ‐XRF) analysis of otoliths was evaluated as a method to estimate the proportion of stocked one‐summer‐old whitefish Coregonus lavaretus L. in catches of adult fish (n = 20) ascending the River Kemijoki to spawn. Laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) analysis was applied as control. Polish...
Article
The strontium concentration in the core of otoliths was used to determine the provenance of whitefish found in the Gulf of Bothnia, Baltic Sea. To that end, a database of strontium concentration in fish otoliths representing different habitats (sea, river and fresh water) had to be built. Otoliths from juvenile whitefish were therefore collected fr...

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