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The use of Fourier analysis as a tool for Oblada melanura (Linnaeus, 1758) stock unit separation in the south central Mediterranean Sea

Published online by Cambridge University Press:  19 July 2017

Manel Barhoumi ,
Widien Khoufi ,
Sawssen Kalai ,
Anissa Ouerhani ,
Sabrine Essayed ,
Ghada Zaier ,
Héla Jaziri ,
Sadok Ben Meriem  and
Rafika Fehri-Bedoui
Manel Barhoumi
Affiliation:
University of Tunis El Manar, Faculty of Sciences of Tunis (FST), Physiology and Aquatic Environment (UR/13ES, 35), Campus F. Hached, 2092 Tunis, Tunisia
Widien Khoufi
Affiliation:
National Institute of Sciences and Marine Technologies (INSTM), Port La Goulette, 2060 Tunis, Tunisia
Sawssen Kalai
Affiliation:
National Institute of Sciences and Marine Technologies (INSTM), Port La Goulette, 2060 Tunis, Tunisia
Anissa Ouerhani
Affiliation:
University of Tunis El Manar, Faculty of Sciences of Tunis (FST), Physiology and Aquatic Environment (UR/13ES, 35), Campus F. Hached, 2092 Tunis, Tunisia
Sabrine Essayed
Affiliation:
University of Tunis El Manar, Faculty of Sciences of Tunis (FST), Physiology and Aquatic Environment (UR/13ES, 35), Campus F. Hached, 2092 Tunis, Tunisia
Ghada Zaier
Affiliation:
University of Tunis El Manar, Faculty of Sciences of Tunis (FST), Physiology and Aquatic Environment (UR/13ES, 35), Campus F. Hached, 2092 Tunis, Tunisia
Héla Jaziri
Affiliation:
National Institute of Sciences and Marine Technologies (INSTM), Port La Goulette, 2060 Tunis, Tunisia
Sadok Ben Meriem
Affiliation:
National Institute of Sciences and Marine Technologies (INSTM), Port La Goulette, 2060 Tunis, Tunisia
Rafika Fehri-Bedoui*
Affiliation:
University of Tunis El Manar, Faculty of Sciences of Tunis (FST), Physiology and Aquatic Environment (UR/13ES, 35), Campus F. Hached, 2092 Tunis, Tunisia
*
Correspondence should be addressed to: R. Fehri-Bedoui, University of Tunis El Manar, Faculty of Sciences of Tunis (FST), Physiology and Aquatic Environment (UR/13ES, 35), Campus F. Hached, 2092 Tunis, Tunisia email: rafikafehri@gmail.com
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Abstract

For the first time, an otolith shape analysis was used to investigate the stocks of saddled bream (Oblada melanura, Linnaeus, 1758) in three fishing zones along the Tunisian coast (Bizerte, Kélibia and Sayada). Otolith shape analysis was used on 30 otoliths for each site, sampled during the spawning period. Using elliptic Fourier descriptors (EFD) the quantization of the shape otolith was investigated by SHAPE and multivariate statistical procedures. Considering the environmental and the genotypic aspects, the preliminary results of the otolith shape analysis showed dissimilarity in silhouette of otoliths of saddled bream stocks collected from the north (Bizerte), the north-east (Kélibia) and the east (Sayada) of the Tunisian coast. Therefore, these three groups could be considered as three sub-units of the Tunisian stock, which should be managed separately.

Keywords

Oblada melanuraotolith shapeelliptic Fourier descriptors (EFD)stockTunisia
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 98 , Issue 7 , November 2018 , pp. 1725 - 1732
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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