A method for the mass marking of ide Leuciscus idus larvae by feeding them Artemia salina nauplii that were immersed in different solutions of alizarin red S, tetracycline hydrochloride and calcein was tested. The best quality marks were obtained after feeding fish for 4 days with nauplii that had been immersed in 200 mg l(-1) alizarin red S.
Keywords: alizarin red S; calcein; fluorochromes; ide; otolith; tetracycline hydrochloride.
© 2015 The Fisheries Society of the British Isles.