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Measurements on ground or sectioned otoliths: possibilities of bias
Author(s) -
Panfili J.,
Ximenes M.C.
Publication year - 1992
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1992.tb02650.x
Subject(s) - grinding , otolith , plane (geometry) , fish <actinopterygii> , biology , materials science , mathematics , fishery , geometry , composite material
Back‐calculation usually requires measurements of growth marks revealed on otoliths by specific preparations. The standardization of the grinding (or sectioning) plane is necessary, but difficult, especially along the antero‐posterior axis. In order to show the importance of the grinding plane, tetracycline labelling of eel otoliths ( Anguilla anguilla L.) has been used. This marking has a calcio‐traumatic effect on otoliths, which can be revealed with staining techniques. Unless the grinding plane is incorrect, the tetracycline labelling and the staining of the ground surface are then superposed.