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Prevalence of stocked whitefish in River Kemijoki, Finland, inferred by micro X-ray fluorescence analysis of otoliths

Finnas, Viktor and Lill, Jan-Olof and Heimbrand, Yvette and Blass, Martina and Saarinen, Timo and Lahaye, Yann and Jokikokko, Erkki and Hagerstrand, Henry (2020). Prevalence of stocked whitefish in River Kemijoki, Finland, inferred by micro X-ray fluorescence analysis of otoliths. Fisheries Management and Ecology. 27 , 490-497
[Journal article]

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Abstract

Micro X-ray fluorescence (mu-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. Polished otoliths were scanned with mu-XRF to obtain strontium maps that were used to infer visually the provenance of the whitefish. Thirteen of the fish showed signs of being stocked as one-summer-old fingerlings. LA-ICP-MS was applied to determine the elemental composition in a spot outside the core of the otolith. The results were largely consistent with the visual inspection of the mu-XRF mapped otoliths. In conclusion, mu-XRF mapping successfully identified whitefish stocked as one-summer-old fingerlings. The vast majority of whitefish returning to the River Kemijoki to spawn were stocked fish.

Authors/Creators:Finnas, Viktor and Lill, Jan-Olof and Heimbrand, Yvette and Blass, Martina and Saarinen, Timo and Lahaye, Yann and Jokikokko, Erkki and Hagerstrand, Henry
Title:Prevalence of stocked whitefish in River Kemijoki, Finland, inferred by micro X-ray fluorescence analysis of otoliths
Year of publishing :2020
Volume:27
Page range:490-497
Number of Pages:8
ISSN:0969-997X
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:mu-XRF, Baltic Sea, elemental analysis, LA-ICP-MS, otolith, whitefish
URN:NBN:urn:nbn:se:slu:epsilon-p-105756
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-105756
Additional ID:
Type of IDID
DOI10.1111/fme.12430
Web of Science (WoS)000532732200001
ID Code:17620
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:29 Sep 2020 11:00
Metadata Last Modified:29 Sep 2020 11:01

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