Farid Hemida
École Normale Supérieure
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Featured researches published by Farid Hemida.
PLOS ONE | 2017
Alessia Cariani; Silvia Messinetti; Alice Ferrari; Marco Arculeo; Juan Jose Bonello; Leanne Bonnici; Rita Cannas; Pierluigi Carbonara; Alessandro Cau; Charis Charilaou; Najib El Ouamari; Fabio Fiorentino; Maria Cristina Follesa; Germana Garofalo; Daniel Golani; Ilaria Guarniero; Robert Hanner; Farid Hemida; Omar Kada; Sabrina Lo Brutto; Cecilia Mancusi; G. Morey; Patrick J. Schembri; Fabrizio Serena; Letizia Sion; Marco Stagioni; Angelo Tursi; Nedo Vrgoč; Dirk Steinke; Fausto Tinti
Cartilaginous fish are particularly vulnerable to anthropogenic stressors and environmental change because of their K-selected reproductive strategy. Accurate data from scientific surveys and landings are essential to assess conservation status and to develop robust protection and management plans. Currently available data are often incomplete or incorrect as a result of inaccurate species identifications, due to a high level of morphological stasis, especially among closely related taxa. Moreover, several diagnostic characters clearly visible in adult specimens are less evident in juveniles. Here we present results generated by the ELASMOMED Consortium, a regional network aiming to sample and DNA-barcode the Mediterranean Chondrichthyans with the ultimate goal to provide a comprehensive DNA barcode reference library. This library will support and improve the molecular taxonomy of this group and the effectiveness of management and conservation measures. We successfully barcoded 882 individuals belonging to 42 species (17 sharks, 24 batoids and one chimaera), including four endemic and several threatened ones. Morphological misidentifications were found across most orders, further confirming the need for a comprehensive DNA barcoding library as a valuable tool for the reliable identification of specimens in support of taxonomist who are reviewing current identification keys. Despite low intraspecific variation among their barcode sequences and reduced samples size, five species showed preliminary evidence of phylogeographic structure. Overall, the ELASMOMED initiative further emphasizes the key role accurate DNA barcoding libraries play in establishing reliable diagnostic species specific features in otherwise taxonomically problematic groups for biodiversity management and conservation actions.
Israel Journal of Zoology | 2003
Christian Capapé; Farid Hemida; Amadou Abdoulaye Seck; Youssouph Diatta; c Youssouph Diatta; Jeanne Zaouali
The spinner shark, Carcharhinus brevipinna, is a Lessepsian immigrant formerly common in the Gulf of Gabes (southeastern Tunisia, central Mediterranean). It migrated northward into the Gulf of Tunis as a consequence of competition pressure from its sympatric species, the sandbar shark, C. plumbeus. Adult males and females reach over 1720 mm and 1960 mm total length (TL), respectively. The largest known male and female are 2630 mm and 2750 mm TL, respectively. There is no significant relationship of mass versus TL between males and females. C. brevipinna is a placental viviparous elasmobranch. Adult females have a single functional ovary and two functional uteri, in which encapsulated eggs and embryos are equally distributed. Mating occurs in spring or early summer; parturition, in August. Gestation lasts 13-14 months or longer, and there is a seasonal reproductive cycle. Vitellogenesis proceeds in parallel with gestation. Diameter of the largest yellow-yolked oocytes ranges from 31 to 36 mm (33.3 mm ± 1.4...
PeerJ | 2018
Alice Ferrari; Fausto Tinti; Victoria Bertucci Maresca; A. Velonà; Rita Cannas; Ioannis Thasitis; Filipe O. Costa; Maria Cristina Follesa; Daniel Golani; Farid Hemida; Sarah J. Helyar; Cecilia Mancusi; Antonello Mulas; Fabrizio Serena; Letizia Sion; Marco Stagioni; Alessia Cariani
Background The unique and complex paleoclimatic and paleogeographic events which affected the Mediterranean Sea since late Miocene deeply influenced the distribution and evolution of marine organisms and shaped their genetic structure. Following the Messinian salinity crisis and the sea-level fluctuations during the Pleistocene, several Mediterranean marine species developed deep genetic differentiation, and some underwent rapid radiation. Here, we consider two of the most prioritized groups for conservation in the light of their evolutionary history: sharks and rays (elasmobranchs). This paper deals with a comparative multispecies analysis of phylogeographic structure and historical demography in two pairs of sympatric, phylogenetically- and ecologically-related elasmobranchs, two scyliorhinid catsharks (Galeus melastomus, Scyliorhinus canicula) and two rajid skates (Raja clavata, Raja miraletus). Sampling and experimental analyses were designed to primarily test if the Sicilian Channel can be considered as effective eco-physiological barrier for Mediterranean demersal sympatric elasmobranchs. Methods The phylogeography and the historical demography of target species were inferred by analysing the nucleotide variation of three mitochondrial DNA markers (i.e., partial sequence of COI, NADH2 and CR) obtained from a total of 248 individuals sampled in the Western and Eastern Mediterranean Sea as well as in the adjacent northeastern Atlantic Ocean. Phylogeographic analysis was performed by haplotype networking and testing spatial genetic differentiation of samples (i.e., analysis of molecular variance and of principal components). Demographic history of Mediterranean populations was reconstructed using mismatch distribution and Bayesian Skyline Plot analyses. Results No spatial genetic differentiation was identified in either catshark species, while phylogeographic structure of lineages was identified in both skates, with R. miraletus more structured than R. clavata. However, such structuring of skate lineages was not consistent with the separation between Western and Eastern Mediterranean. Sudden demographic expansions occurred synchronously during the upper Pleistocene (40,000–60,000 years ago) in both skates and G. melastomus, likely related to optimal environmental conditions. In contrast, S. canicula experienced a slow and constant increase in population size over the last 350,000 years. Discussion The comparative analysis of phylogeographic and historical demographic patterns for the Mediterranean populations of these elasmobranchs reveals that historical phylogeographic breaks have not had a large impact on their microevolution. We hypothesize that interactions between environmental and ecological/physiological traits may have been the driving force in the microevolution of these demersal elasmobranch species in the Mediterranean rather than oceanographic barriers.
Journal of Experimental Marine Biology and Ecology | 2005
Teresa Maggio; Franco Andaloro; Farid Hemida; Marco Arculeo
Cybium | 2004
Christian Capapé; Amadou Abdoulaye Seck; Youssouph Diatta; Christian Reynaud; Farid Hemida; Jeanne Zaouali
Acta Adriatica | 2004
Farid Hemida; Youssouph Diatta; Daniel Golani; Jamila Ben Souissi; Olivier Guelorget; Christian Capapé
Cybium | 2005
Cecilia Mancusi; Simona Clo; Marco Affronte; Mohamed Nejmeddline Bradaï; Farid Hemida; Fabrizio Serena; Alen Soldo; Marino Vacchi
Acta Adriatica | 2005
Christian Capapé; Jamila Ben Souissi; Hamadi Mejri; Olivier Guelorget; Farid Hemida
Acta Adriatica | 2004
Christian Capapé; Farid Hemida; Olivier Guelorget; Joan Barrull; Isabel Mate; Jamila Ben Souissi; Mohamed Nejmeddine Bradaï
Cybium | 2009
Farid Hemida; Christian Capapé