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Title: Misidentification of the migratory history of anguillid eels by Sr/Ca ratios of vaterite otoliths
Authors: Wann-Nian . Tzeng;Chih-Wei Chang;Chia-Hui Wang;Jen-Chieh Shiao;Yoshiyuki Iizuka;Ying Yang;Chen-Feng You;Linas Lozys
Contributors: 國立臺灣海洋大學:環境生物與漁業科學學系
Date: 2007-10
Issue Date: 2016-12-30T07:33:31Z
Publisher: Marine Ecology Progress Series
Abstract: Abstract:Most fish otoliths are composed of aragonite, but occasionally they form a mosaic with its polymorph, vaterite. We found an unusual mosaic structure of extremely low strontium to calcium (Sr/Ca) ratio in the aragonite otoliths of European eels Anguilla anguilla. The mosaic crystal structure in the eel otolith appeared opaque under reflected light after EDTA etching and was confirmed to be a vaterite crystal by Raman spectroscopy. Analysis by laser ablation inductively coupled plasma mass spectrometry indicated that the elements sodium (Na), strontium (Sr) and barium (Ba) were lower in abundance and magnesium (Mg) and manganese (Mn) were higher in the vaterite than in the aragonite. Otoliths with vaterite inclusions were found in 48.1% of the 108 eels examined. If the mosaic vaterite in otoliths is not identified and avoided, the migratory environmental history of fish could be misidentified when otolith elemental signatures are used as biological tracers.
Relation: 50
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/39801
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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