Extracting daily isotopic records on fish otolith ( Trachurus japonicus ) by combining micro‐milling and micro‐scale isotopic analysis (MICAL‐CF‐IRMS)

Autor: Daichi Muto, Toyoho Ishimura, Motomitsu Takahashi, Kozue Nishida
Rok vydání: 2022
Předmět:
Zdroj: Rapid Communications in Mass Spectrometry. 36
ISSN: 1097-0231
0951-4198
DOI: 10.1002/rcm.9366
Popis: The recent progress in micro-scale isotopic analytical techniques for otoliths has enabled the reconstruction of the experienced water temperature history of fish in every few days resolution using the stable oxygen isotope ratio (δGrowth rings were formed daily in fish otoliths. We precisely distinguished the daily rings in otoliths of Japanese jack mackerel Trachurus japonicus, and milled them along daily growth rings using a high-spatial resolution micromilling system (Geomill326). Then, we determined the stable carbon and oxygen (δWe successfully milled each daily ring with width ranging from 14.0 to 62.9 μm (average 27.0 μm) during the high growth period (30-70 days after hatching), and determined the isotopic compositions of otolith aragonite.Our improved micro-scale analytical method is the first to determine the daily δ
Databáze: OpenAIRE
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