Determination of the freshwater mark in otoliths of Japanese eel elvers using microstructure and Sr/Ca ratios

Abstract

The microstructure, in particular checks within the otolith edge, of Anguilla japonica glass-eels and elvers and changes in otolith Sr/Ca ratios were examined to ascertain the environmental history of the eels, especially with regard to the time when glass-eels entered the river, and as a benchmark for count daily increments. The percentage of glass eels… (More)
DOI: 10.1023/A:1007429332507

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