Home About Browse Search
Svenska


Micro-X-ray fluorescence image analysis of otoliths to distinguish between wild-born and stocked river-spawning whitefish captured in the Baltic Sea

Finnas, Viktor and Lill, Jan-Olof and Saarinen, Timo and Lindqvist, Christer and Heimbrand, Yvette and Jokikokko, Erkki and Hagerstrand, Henry (2022). Micro-X-ray fluorescence image analysis of otoliths to distinguish between wild-born and stocked river-spawning whitefish captured in the Baltic Sea. Fisheries Management and Ecology. 29 :3 , 233-240
[Research article]

[img] PDF
1MB

Abstract

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, river-spawning whitefish stocked as one-summer-old fingerlings caught ascending the River Kemijoki, and sea-spawning whitefish caught near the angstrom land Islands was mapped using mu-XRF. The strontium-depleted regions in the centre of the whitefish otoliths, measured using ImageJ, had mean sizes of 0.18 +/- 0.2 mm(2) (River Tornionjoki) and 2.3 +/- 0.3 mm(2) (River Kemijoki), whereas the otoliths from whitefish caught at sea lacked a strontium-depleted region altogether. Measurement of the area of the strontium-depleted region in whitefish otoliths provides a convenient method with which to differentiate between whitefish of different provenance and to determine the origins of whitefish in mixed catches.

Authors/Creators:Finnas, Viktor and Lill, Jan-Olof and Saarinen, Timo and Lindqvist, Christer and Heimbrand, Yvette and Jokikokko, Erkki and Hagerstrand, Henry
Title:Micro-X-ray fluorescence image analysis of otoliths to distinguish between wild-born and stocked river-spawning whitefish captured in the Baltic Sea
Series Name/Journal:Fisheries Management and Ecology
Year of publishing :2022
Volume:29
Number:3
Page range:233-240
Number of Pages:8
Publisher:WILEY
ISSN:0969-997X
Language:English
Publication Type:Research 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:Gulf of Bothnia, River Kemijoki, River Tornionjoki
URN:NBN:urn:nbn:se:slu:epsilon-p-115066
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-115066
Additional ID:
Type of IDID
DOI10.1111/fme.12525
Web of Science (WoS)000729201600001
Scopus2-s2.0-85120851377
ID Code:27886
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:16 May 2022 08:25
Metadata Last Modified:16 May 2022 08:31

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits