Genetic structure of Octopus vulgaris (Cephalopoda,Octopodidae) in the central Mediterranean Sea inferred from the mitochondrial COIII gene |
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| Authors: | Karima Fadhlaoui-Zid Leyla Knittweis Didier Aurelle Chaala Nafkha Soufia Ezzeddine Fabio Fiorentino Hisham Ghmati Luca Ceriola Othman Jarboui Ferruccio Maltagliati |
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| Institution: | 1. National Institute of Marine Sciences and Technologies, 2025 Carthage Salammbô, Tunisia;2. Capture Fisheries Section, Ministry for Resources and Rural Affairs (MRRA), Fort San Lucjan, Marsaxlokk, BBG 1283, Malta;3. Aix-Marseille université, CNRS, IMBE UMR 7263, 13007 Marseille, France;4. Istituo per l’Ambiente Marino Costiero – Consiglio Nazionale delle Ricerche of Mazara del Vallo, Italy;5. Marine Biology Research Center, Tajura, Tripoli, Libya;6. Food and Agriculture Organization of the United Nations (FAO), Viale delle Terme di Caracalla, 00153 Rome, Italy;7. Dipartimento di Biologia, Università di Pisa, Via Derna 1, 56126 Pisa, Italy |
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| Abstract: | The polymorphism of the mitochondrial gene cytochrome oxidase III was studied in the Mediterranean octopus, Octopus vulgaris Cuvier, 1797. A total of 202 specimens from seven sampling sites were analysed with the aim of elucidating patterns of genetic structure in the central Mediterranean Sea and to give an insight into the phylogeny of the Octopus genus. Phylogenetic analyses showed that individuals from the central Mediterranean belong to the O. vulgaris species whose limits should nevertheless be clarified. Concerning genetic structure, two high-frequency haplotypes were present in all locations. The overall genetic divergence (ΦST = 0.05, P < 0.05) indicated a significant genetic structuring in the study area and an AMOVA highlighted a significant break between western and eastern Mediterranean basins (ΦCT = 0.094, P < 0.05). Possible explanations for the observed patterns of genetic structuring are discussed with reference to their relevance for fisheries management. |
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