Otolith elemental fingerprinting for stock identification of Atlantic cod (Gadus morhua) using laser ablation ICPMS

S. E. Campana, A. J. Fowler, C. M. Jones

Research output: Contribution to journalArticlepeer-review

202 Citations (Scopus)

Abstract

Trace element incorporation into fish otoliths varies among samples collected at different sites. If otolith elemental composition (the elemental "fingerprint') reflects the characteristics of the ambient water, the elemental fingerprint of the otolith nucleus could serve as a natural marker of fish hatched at different sites. To test this hypothesis, cod otoliths collected from five spawning grounds in the NW Atlantic were tested for differences in elemental and isotopic composition. Laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) was used to assay the concentration of 14 isotopes (nine elements) in otolith nuclei. The sensitivity of the laser ablation system exceeded that of the electron microprobe by 2-4 orders of magnitude, with an average CV of 21% for any given isotope. Multivariate analyses of the elemental fingerprints resulted in significant discrimination among sample sites. -from Authors

Original languageEnglish
Pages (from-to)1942-1950
Number of pages9
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume51
Issue number9
DOIs
Publication statusPublished - 1994

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