Hostname: page-component-76d6cb85b7-mgxrv Total loading time: 0 Render date: 2026-07-24T15:57:50.040Z Has data issue: false hasContentIssue false

A new approach to marine fish otoliths study: electron paramagnetic resonance

Published online by Cambridge University Press:  09 May 2013

Roberto Weider De Assis Franco
Affiliation:
Universidade Estadual do Norte Fluminense, CCT, Laboratório de Ciências Físicas, Avenida Alberto Lamego, 2000, Campos dos Goytacazes, RJ, 28013-620, Brazil
Juraci Aparecido Sampaio
Affiliation:
Universidade Estadual do Norte Fluminense, CCT, Laboratório de Ciências Físicas, Avenida Alberto Lamego, 2000, Campos dos Goytacazes, RJ, 28013-620, Brazil
Antônio Medina
Affiliation:
Universidade Estadual de Maringá, Departamento de Física, Avenida Colombo, 5790, Maringá, PR, 87020-900, Brazil
Ana Paula Madeira Di Beneditto*
Affiliation:
Universidade Estadual do Norte Fluminense, CBB, Laboratório de Ciências Ambientais, Avenida Alberto Lamego, 2000, Campos dos Goytacazes, RJ, 28013-620, Brazil
*
Correspondence should be addressed to: A. P. M. Di Beneditto, Universidade Estadual do Norte Fluminense, CBB, Laboratório de Ciências Ambientais, Avenida Alberto Lamego, 2000, Campos dos Goytacazes, RJ, 28013-620, Brazil email: anapaula@uenf.br

Abstract

The biocrystallization process and the prescence of manganese in sagitta otoliths is described for the first time via electron paramagnetic spectroscopy. Spectra of Mn2+ are applied to verify inter-species differences in 12 Sciaenidae species and geographic variations among three stocks of banded croaker Paralonchurus brasiliensis and rake stardrum Stellifer rastrifer. Similar spectra shape and zero-field splitting D (22.4 mT) indicated that the biocrystallization process is the same for all fish species, at any stage of development and under different environmental conditions, corresponding to Mn2+ in the aragonite (CaCO3). Inter-species differences in Mn2+ concentration were detected regarding the otolith shape. Elongated otoliths have higher manganese concentrations compared to rounded otoliths. Geographic variations among stocks of P. brasiliensis and S. rastrifer could be detected. Fish stocks under riverine influence have less Mn2+ concentration than ones under marine influence. Manganese detection via electron paramagnetic spectroscopy is a non-destructive approach that can be useful in fish stocks studies.

Information

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable