info:eu-repo/semantics/article
Otolith shape index: Is it a tool for trophic ecology studies?
Fecha
2019-11Registro en:
Maichak De Carvalho, Barbara; Spach, Henry Louis; Vaz Dos Santos, André Martins; Volpedo, Alejandra; Otolith shape index: Is it a tool for trophic ecology studies?; Cambridge University Press; Journal of the Marine Biological Association of the United Kingdom; 99; 7; 11-2019; 1675-1682
0025-3154
1469-7769
CONICET Digital
CONICET
Autor
Maichak De Carvalho, Barbara
Spach, Henry Louis
Vaz Dos Santos, André Martins
Volpedo, Alejandra
Resumen
The aim of this study was to test the effective separation of shape indices of otoliths of three species belonging to the family Sciaenidae before and after in vitro digestion. We measured 328 sagittal otoliths and applied six shape indices. Before the experiment, the aspect ratio (otolith height/otolith length%), circularity, ellipticity and relative surface of the sulcus acusticus were suitable for differentiating the species of genera Paralonchurus and Stellifer. Among the species of Stellifer, the aspect ratio and rectangularity were suitable. Otoliths exposed to in vitro digestion showed no significant differences in their morphometry before and after the experiment. After in vitro digestion, the aspect ratio and circularity were effective in separating Paralonchurus and Stellifer. However, none of the indices used in the present study were efficient to separate otoliths of congeneric species after in vitro digestion.