Otolith biomineralisation: Insights from a microstructural and microanalytical study

A. McFadden, B. Gillanders, A. Pring, B. Wade

Research output: Contribution to journalConference article

Abstract

In conjunction with microstructural interpretation, variation of the Sr/Ca ratio in otoliths of Platycephalus bassensis have been determined in an effort to uncover the role of biomineralisation in otolith trace element uptake. After subsequent microstructural analysis by Electron Backscatter Diffraction (EBSD), Sr/Ca ratios across otolith growth rings were determined by Electron Probe Microanalysis (EPMA). Results point towards heterogeneous Sr/Ca ratios across an individual otolith, with ratio variation shown to be associated with changing crystal fabric. The apparent correlation between otolith microstructure and chemistry, indicates that Sr incorporation is not exclusively environmentally regulated as previously thought [1-3], but rather falls under the influence of both biological and environmental factors.
Original languageEnglish
Pages (from-to)1320-1321
Number of pages2
JournalMicroscopy and Microanalysis
Volume20
Issue number3
DOIs
Publication statusPublished - 1 Aug 2014
Externally publishedYes
EventMicroscopy and Microanalysis 2014, M and M 2014 - Hartford, United States
Duration: 3 Aug 20147 Aug 2014

Keywords

  • otolith
  • Aragonite
  • environmental conditions
  • biomineralisation
  • Sr/Ca ratios

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