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Use of otolith microchemical and morphological analyses for stock discrimination of Sarpa salpa on two Tunisian islands, Djerba and Kerkennah

Published online by Cambridge University Press:  22 March 2024

Meriam Ben Ghorbel*
Affiliation:
Laboratory of Ecology, Biology and Physiology of Aquatic Organisms, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
Marwa Mejri
Affiliation:
Laboratory of Ecology, Biology and Physiology of Aquatic Organisms, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia University of Carthage, Higher Institute of Fishery and Aquaculture of Bizerte, Errimel, B.P.15.7080 Bizerte, Tunisia
Houeto Madel Floriane Adjibayo
Affiliation:
Laboratory of Ecology, Biology and Physiology of Aquatic Organisms, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
Abdellah Chalh
Affiliation:
Unit of Population Genetics and Biological Resources, Faculty of Sciences, Tunis, Tunisia
Jean-Pierre Quignard
Affiliation:
Laboratory of Ecology, Biology and Physiology of Aquatic Organisms, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
Monia Trabelsi
Affiliation:
Laboratory of Ecology, Biology and Physiology of Aquatic Organisms, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
Nawzet Bouriga
Affiliation:
Laboratory of Ecology, Biology and Physiology of Aquatic Organisms, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia University of Carthage, Higher Institute of Fishery and Aquaculture of Bizerte, Errimel, B.P.15.7080 Bizerte, Tunisia
*
Corresponding author: Meriam Ben Ghorbel; Email: meriem_benghorbel@hotmail.com

Abstract

Otolith morphological and microchemical analyses are relatively new scientific research methods used in fish stock evaluation and management. However, in Tunisia, only morphological methods have been used. The objective of this study was the Sarpa salpa stock discrimination of Djerba and Kerkennah by the otoliths morphological and microchemical analysis, while carrying out a fluctuating asymmetry analysis and a stock comparison of males and females for each population. The results revealed significant differences between the Djerba and Kerkennah populations, significant differences between the stocks of males and females in each population, and a highly significant fluctuating asymmetry for both populations. The results of the otolith morphological analysis were similar to those of the microchemical analysis. This result proves that both morphological and microchemical analyses are powerful tools for fish stock discrimination.

Type
Research Article
Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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