Atsb2009 genetic diversity of some solea solea atlanto-mediterranean populationsPresentation Transcript
GENETIC DIVERSITY OF SOME SOLEA SOLEA ATLANTO-MEDITERRANEAN POPULATIONS USING ALLOZYMES AND EPIC-PCR MARKERSKHALED OUANES, LILIA BAHRI-SFAR, MYRIAM KAOUECHE, MALEKHAFFANI, FRANCOIS BONHOMME & OUM KALTHOUM BEN HASSINE E-mail: firstname.lastname@example.org
INTRODUCTIONThe Mediterranean has some “special” features such as:- A succession of geological and climatic complex events- A complex faunistic history-Transition Zones (Atlantic - the Western Mediterranean; The Western Mediterranean - the EasternMediterranean; The Eastern Mediterranean - Red Sea) representing considerable areas ofexchanges which result in a significant biodiversityDuring the last decades, the geological history of the MediterraneanSea, its hydrography and connection with the Atlantic Ocean havebeen well studied. The Atlantic–Mediterranean transition remainscontroversial at the biological level as there are discordant resultsregarding the biogeographical separation between the Atlantic andMediterranean biota.
The opening of the Strait of Gibraltar (some 5.33 million yearsago), removed the land barriers that obstructed the marine biotaallowing it to disperse freely into the Mediterranean Sea.However, present day genetic patterns suggest a limitation to geneflow for some marine species. Mediterranean Fish taxa do not show auniform phylogeographical pattern.Extreme striking cases were documented of either total separationbetween Atlantic and Mediterranean populations or completeabsence of population differentiation between Atlantic andMediterranean samples.
In such context, we chose to analyze the spatial population structure of some Atlanto-Mediterranean populations of Solea solea to assess the existence of gene flux between these populations.This study is even more interesting if we deem in the fact thatFlatfish species, and especially soles, constitute good candidates foraquaculture. This sector experiences a ceaseless development andexpansion when it comes to zootechnical procedures / techniquesand also the diversification of the cultivated species.
Biological Material -Six Solea species exist along the Tunisian coasts. - Solea solea is one of the most frequent sole species in Tunisia. - It is present everywhere in the Solea solea Mediterranean and lives along the eastern shores of the Atlantic. - It is distinguished from the other Solea species thanks to the morphological aspect of its fins.
# Sampling site Number of individuals1 Pertuis (France) 72 Morocco (Atlantic) 313 Morocco (Mediterranean) 304 Tabarka 65 Bizerta lagoon 156 Ischkeul 107 Ghar El Melh 68 Goulette 319 Sfax 8010 Gabes 2911 Boughrara 3012 Biban lagoon 15 Total 290