Daily growth increments in otoliths of wild‐caught honmoroko Gnathopogon caerulescens

Abstract

Otolith growth increments in wild‐caught alizarin complex one (ALC)‐marked honmoroko Gnathopogon caerulescens were examined to verify the veracity of the age determination method in cyprinids. ALC‐marked G. caerulescens recaptured from their natural environment had lapilli increment counts outside the ALC ring mark that had formed on a daily basis during the juvenile stage. This apparently being the first direct evidence of daily periodicity of otolith increment formation in wild‐caught cyprinids.