A new aging technique by UV light observation of burnt otoliths for the conger eel Conger myriaster (Brevoort)

Satoshi Katayama, Toshinori Ishida, Katsuya Goto, Keiki Iizuka, Keishiro Karita

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A new aging method, fluorescent observation of burnt otoliths, was discovered to disclose the age and growth of the conger eel. Under UV light, bright fluorescent zones were visible in the burnt otolith but not in the unburnt otolith. An illumination wavelength around 380nm was found to be suitable for fluorescence observation of burnt otoliths. Bright zones of the conger eel otolith formed around June-August in Sendai Bay and were validated as annuli. The conger eels caught by net pot fishery were found to be mainly aged from 1+ to 4+ years.

Original languageEnglish
Pages (from-to)81-84
Number of pages4
JournalIchthyological Research
Volume49
Issue number1
Publication statusPublished - 2002 Feb 1

Keywords

  • Age determination
  • Burning method
  • Conger myriaster
  • Otolith
  • UV observation

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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