Cathodoluminescence Microscopy: A Useful Tool for Assessing Incremental Chemical Variation in Otoliths
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- 作者：Norman M. Halden ; Karen Mathers ; John A. Babaluk and Sergio R. Mejia
- 关键词：otolith ; life history ; trace elements ; PIXE ; environmental chemistry
- 刊名：Environmental Biology of Fishes
- 出版年：2004
- 出版时间：2004
- 年：2004
- 卷：71
- 期：1
- 页码：53-61
- 全文大小：229 KB
文摘
Otoliths taken from fish from Eden Lake, Manitoba show yellow–green and red cathodoluminescence of varying intensity that corresponds to their annular structure. Proton-induced X-ray emission analysis shows manganese (Mn) concentrations of between 2 and 205ppm, zinc (Zn) concentrations between 2 and 290ppm and strontium (Sr) concentrations up to 1500ppm in the otoliths. The distribution of luminescence correlates with the distribution of Mn. The Mn, Zn and Sr are likely derived from the monzonitic rocks surrounding the lake. Variations in the distribution of cathodoluminescence may be a useful tool for evaluating changes in environmental chemistry and fish life histories.