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An improved grinding technique for examining fish otoliths for age and growth studies with special consideration of the eel, Anguilla anguilla L.
Author(s) -
VÉRÓ M.,
PAULOVITS G.,
BIRÓ P.
Publication year - 1986
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1986.tb00104.x
Subject(s) - otolith , biology , fish <actinopterygii> , grinding , fishery , supernumerary , zoology , anatomy , metallurgy , materials science
Abstract. A simple technique of grinding eel otoliths (sagittae) for age/growth studies is described. On thin, polished otolith layers the annual growth rings, as well as supernumerary zones formed in fresh water, could be easily distinguished. The described equipment and grinding procedure gave good results on permanent preparations, allowing repeated age‐readings. The procedure appears to be applicable to other fish species as well.