alexa Foot Abnormalities in Venericardia antiquata and Venus verrucosa from the Bizerte Lagoon Complex (Northern Tunisia): Hydrodynamics and Sediment Texture Inductions
ISSN: 2155-9546

Journal of Aquaculture Research & Development
Open Access

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Research Article

Foot Abnormalities in Venericardia antiquata and Venus verrucosa from the Bizerte Lagoon Complex (Northern Tunisia): Hydrodynamics and Sediment Texture Inductions

Jihen Maâtoug Béjaoui, Ferdaous Jaafar Kefi, Anwar Mleiki and Najoua Trigui El Menif*

Faculty of Sciences of Bizerte (FSB), Laboratory of Environment Biomonitoring, University of Carthage, Bizerte, Tunisia

Corresponding Author:
Najoua Trigui El Menif
Faculty of Sciences of Bizerte (FSB)
Laboratory of Environment Biomonitoring, University
of Carthage, 7021 Zarzouna, Bizerte, Tunisia
Tel: 00216 98 94 58 24
Fax: 00216 71 88 84 67
E-mail: [email protected]

Received date: June 16, 2016; Accepted date: July 22, 2016; Published date: July 25, 2016

Citation: Béjaoui JM, Kefi FJ, Mleiki A, El Menif NT (2016) Foot Abnormalities in Venericardia antiquata and Venus verrucosa from the Bizerte Lagoon Complex (Northern Tunisia): Hydrodynamics and Sediment Texture Inductions. J Aquac Res Development 7:434. doi:10.4172/2155-9546.1000434

Copyright: © 2016 Béjaoui JM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

The Examination of the soft part of the two bivalve species Venericardia antiquata (Linnaeus 1758) and Venus verrucosa (Linnaeus 1758), that occur together in northern coast of Tunisia, allowed us to discover for the first time the presence of morphological abnormalities affecting the foot of many individuals (annual rate of 31.6%). The presence of a developed byssus was also detected in some specimens of V. antiquata. A classification scale of this malformation, established depending on the degree of this anomaly, showed six initial types that evolve to form two or three feet, at the posterior and/or anterior sides of the animal. In order to determine the causes of this malformation, experiments of transplantation were carried out. Specimens of V. verrucosa collected from Zarzouna station were transplanted in Chaâra station which is characterized by low rate of malformations, low hydrodynamics and different sediment type and vice versa. Results revealed that foot malformations degree is highly correlated with both hydrodynamics and substrate type. This may be the main cause of foot malformations. The present study provides data on foot malformations in V. antiquata and V. verrucosa from the Tunisian coast that could be used as a starting point for future monitoring programs.

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