Sources of otolith morphology variation at the intra-population of two species of sparidae (Pagellus erythrinus and Diplodus vulgaris) collected from the island of Kerkennah (Tunisia)

Abstract

Event Abstract Back to Event Sources of otolith morphology variation at the intra-population of two species of sparidae (Pagellus erythrinus and Diplodus vulgaris) collected from the island of Kerkennah (Tunisia) Marwa Mejri1*, Imen Jmil1, Jean-Pierre QUIGNARD1 and Monia Trabelsi1 1 Faculté des Sciences Mathématiques, Physiques et Naturelles de Tunis, Marine Biology, Tunisia The sea breams, belongs to the Sparidae family, and represents in general ones of main target species of the commercially important fish for Mediterranean shelf fisheries (Fiorentini et al. 1997). In another hand, saccular otolith (Sagitta) have long been recognized as one of the most useful fish anatomic structures because of their accretionary growth, therefore it can be used as powerful tools in fish ageing (Do et al., 2006), identification of fish species and populations (Jawad, 2007), ecomorphological studies (Volpedo and Echeverria, 2003) and determination of fish prey identity in feeding studies (Tarkan et al., 2007). The aim of this research is to investigate and compare by using otolith shape, the stock structure of two species of Sparidae fish (Pagellus erythrinus and Diplodus vulgaris) and in order to see the response of asymmetry for each populations. Here, we analyzed 120 (60 individuals of Pagellus erythrinus, 60 individuals of Diplodus vulgaris, specimens originating from one location in Tunisian (island of kerkennah)). Otolith shape was determined by using Fourier analysis. The mathematical analysis of the otolith shape was achieved by the Discriminant Factor analysis (D.F.A). The basis of this method is the detection of the phenotypic polymorphism between two different populations of fish, between pairs of otoliths from each population and between the pairs of otoliths between the two species. For the Pagellus erythrinus population, the P-value (left-right) is statistically significant (p < 0.05) (asymmetry).However, the p values for the distances of Diplodus vulgaris population were significant (P <0.05) (asymmetry), but the shape asymmetry remains more important for Diplodus vulgaris than in the population of Pagellus erythrinus. In this study the asymmetry (Left-Right) of otoliths detected in both populations is probably due to the physico-chemical and genetic stress. Keywords: otolith, shape, stock, Pagellus erythrinus, Diplodus vulgaris, Symmetry, asymmetry Conference: IMMR'18 | International Meeting on Marine Research 2018, Peniche, Portugal, 5 Jul - 6 Jul, 2018. Presentation Type: Poster Presentation Topic: Fisheries and Management Citation: Mejri M, Jmil I, QUIGNARD J and Trabelsi M (2019). Sources of otolith morphology variation at the intra-population of two species of sparidae (Pagellus erythrinus and Diplodus vulgaris) collected from the island of Kerkennah (Tunisia). Front. Mar. Sci. Conference Abstract: IMMR'18 | International Meeting on Marine Research 2018. doi: 10.3389/conf.FMARS.2018.06.00119 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 17 Apr 2018; Published Online: 07 Jan 2019. * Correspondence: Miss. Marwa Mejri, Faculté des Sciences Mathématiques, Physiques et Naturelles de Tunis, Marine Biology, Tunis El Manar, Tunisia, mejrimarwa991@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Marwa Mejri Imen Jmil Jean-Pierre QUIGNARD Monia Trabelsi Google Marwa Mejri Imen Jmil Jean-Pierre QUIGNARD Monia Trabelsi Google Scholar Marwa Mejri Imen Jmil Jean-Pierre QUIGNARD Monia Trabelsi PubMed Marwa Mejri Imen Jmil Jean-Pierre QUIGNARD Monia Trabelsi Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.