@article{fdi:010058975, title = {{P}opulation genetic structure of {M}ugil cephalus in the {M}editerranean and {B}lack {S}eas : a single mitochondrial clade and many nuclear barriers}, author = {{D}urand, {J}ean-{D}ominique and {B}lel, {H}. and {S}hen, {K}. {N}. and {K}outrakis, {E}. {T}. and {G}uinand, {B}.}, editor = {}, language = {{ENG}}, abstract = {{T}he population structure and evolutionary history of {M}ugil cephalus were investigated across 18 sampling sites in the {NE} {A}tlantic {O}cean, {M}editerranean and {B}lack {S}eas, using 2 classes of genetic markers: sequence polymorphism of an 857 bp fragment of mitochondrial (mt{DNA}) cytochrome b, and allele size variation at 7 nuclear loci. {T}he level of nucleotide diversity recovered with the mt{DNA} marker was very low (similar to 0.6% divergence), indicating the presence of a single clade over the entire area. {M}ismatch distribution, {B}ayesian skyline plots and associated statistics revealed a recent demographic crash followed by population expansion, but nuclear data indicated population constancy in the area covered in this study. {W}hile a single clade was detected, significant mt{DNA} genetic differentiation was, however, observed between the samples from the {B}lack {S}ea and the samples from other (sub-) basins ({P}hi({ST}) = 0.17; p = 0.029). {T}he nuclear loci also revealed significant genetic differentiation and isolation-by-distance in {M}. cephalus. {P}atterns of genetic structure were, however, significantly more pronounced with nuclear than with mt{DNA} markers; the former indicated the presence of 3 ({B}ayesian clustering) to 6 ({M}onmonnier's method) populations. {T}he highest levels of genetic heterogeneity at nuclear markers occurred at the well-known {A}lmeria-{O}ran {F}ront, but also in the {B}osporus {S}trait. {T}hus, both sets of markers revealed the importance of this strait as a barrier to gene flow, probably during the {P}leistocene. {T}he results also revealed genetic heterogeneity in the eastern {M}editerranean basin, and suggested that the population expanded from this sub-basin towards the {A}tlantic {O}cean and {B}lack {S}ea.}, keywords = {{M}icrosatellites ; {M}itochondrial {DNA} ; {G}ene flow ; {D}emography ; {M}editerranean ; {S}ea ; {M}ugilidae ; {B}ayesian clustering ; {B}ayesian skyline plot ; {MEDITERRANNEE} ; {MER} {NOIRE}}, booktitle = {}, journal = {{M}arine {E}cology {P}rogress {S}eries}, volume = {474}, numero = {}, pages = {243--261}, ISSN = {0171-8630}, year = {2013}, DOI = {10.3354/meps10080}, URL = {https://www.documentation.ird.fr/hor/fdi:010058975}, }