Strontium distribution in young-of-the-year Dolly Varden otoliths: Potential for stock discrimination

J. L. Campbell, J. A. Babaluk, M. Cooper, G. W. Grime, N. M. Halden, Z. Nejedly, I. Rajta, J. D. Reist

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Dorso-ventral line scans of otoliths of <1-year-old Dolly Varden show non-uniform Sr and Zn distributions. It is suggested that the high central Sr is a maternal signal, and that the lower outer Sr is due to exogenous feeding and reflects the fishs' riverine environment. The outer Sr is heterogeneous on the scale of a few microns, presumably due to variations caused by daily feeding. Rastering the proton beam over a 60 μm2 area gives good agreement between Sr concentrations in the dorsal and ventral regions. This work has made significant progress towards use of otolith Sr concentrations within the first annular growth increment as a potential stock identifier.

Original languageEnglish
Pages (from-to)185-189
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume189
Issue number1-4
DOIs
Publication statusPublished - Apr 1 2002

Keywords

  • Otoliths
  • PIXE
  • Stock discrimination

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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