Phylogeography of the European sturgeon (Acipenser sturio): A critically endangered species.

摘要: The European sturgeon (Acipenser sturio) was once a common species throughout Europe, but the sole remaining natural population presently inhabits Gironde Estuary in France (Atlantic coast). classified as 'Critically Endangered' 1996, and is now on verge of extinction. In this setting, for first time, we present past phylogeographical features Europe along with an assessment its former genetic diversity. This study based molecular analysis (mtDNA CR sequencing) 10 living specimens from Estuary, 55 museum that had been caught 19th 20th centuries, 59 archaeological remains dating back to 260-5000years BP, which mitochondrial DNA extracted amplified. Although discontinuous, produced data provided realistic image structure A. sturio Europe. Reconstruction phylogenetic trees haplotypes network led identification several clades. diversity found be much greater at core (Iberian Peninsula, Mediterranean Adriatic regions) than margins (Atlantic-Northern Black Sea) range. A series hypotheses dates causes changes species' major structures are put forward basis these data. Finally, competition oxyrinchus, sibling whose presence Northern recently reconsidered, presented factor evolution species.