Türkiye denizlerindeki Pomatomus saltatrix (Linnaeus, 1766)'in mikrosatelit DNA tabanlı popülasyon genetiği

Bluefish, (Pomatomus saltatrix (Linnaeus, 1766)) a commercially important and highly migratory predatory fish species, is found along the coasts of Türkiye. Despite it’s widespread presence along these coasts, there has been no detailed study on the genetic structure of bluefish populations in Türkiye. In order to protect the biological diversity of countries, the genetic diversity present in natural resources must be identified. In this study, we examined the population structure of bluefish in the coastal regions of Türkiye; We aimed to identify bluefish samples collected from 14 regions along Türkiye coast by analyzing microsatellit DNA. For the microsatellite analysis, eight loci (ELF 17, ELF 37, ELF 49, ELF 19, ELF 39, ELF 46, ELF 44, ELF 50) were analyzed. A total of 433 samples from 14 populations were studied. In total 207 alleles and 61 specific alleles were identified across all populations and all loci. The highest observed (Ho) heterozygous values are ELF 50 (Ho: 0,991) while the lowest value is ELF 19 (Ho: 0.716). The highest expected (He) heterozygous values are ELF 39 (He: 0.952) while the lowest value is ELF 50 (He: 0.518). According to the Hardy-Weinberg analysis results, it was determined that there was a significant deviation in all populations. When bluefish populations are clustered according to their phylogenetic lineages by applying principal coordinate analysis (PCoA), the first three axes show 94% of the total genetic variation. The highest variation values and eigenvalues were found on the 3rd axis. When the analysis results are examined, it is clearly seen that the Mersin bluefish population is clustered differently from other populations. According to the Mantel test, a low correlation (R2 = 0.3061, P = 0.01) was detected between genetic and geographical distance. Admixed individuals and low genetic differentiation were observed in all populations.