Otolith Biomineralisation: Insights From a Microstructural and Microanalytical Study
نویسندگان
چکیده
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.
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