A Preliminary genetic investigation on the short-beaked Common Dolphin (Delphinus delphis) in the Turkish seas based on mtDNA sequences
30th Annual Conference of the European Cetacean Society, Funchal, Portekiz, 14 - 16 Mart 2016, ss.120, (Özet Bildiri)
- Yayın Türü: Bildiri / Özet Bildiri
- Basıldığı Şehir: Funchal
- Basıldığı Ülke: Portekiz
- Sayfa Sayıları: ss.120
- Dokuz Eylül Üniversitesi Adresli: Hayır
Özet
The short-beaked common dolphin is a cosmopolitan species, showing an extremely wide distribution in all oceans including the Mediterranean and the Black Sea. Its Black Sea population has been suggested as the subspecies Delphinus delphis ponticus due to its genetic and morphological differences. Although significant differentiation was detected between the Black Sea and Mediterranean common dolphins based on mitochondrial DNA in previous studies, the sample size was relatively small (less than 10). In this study, mitochondrial DNA sequences of 15 individuals collected between 2003 and 2015 in the Turkish Black Sea coast (5 western, 2 eastern), Istanbul Strait (3) and Marmara Sea (5), revealed nine haplotypes, seven of which were new. Five of these new haplotypes were detected in the Turkish Straits System (TSS, consisting of the Istanbul Strait, Marmara Sea and Çanakkale Strait), connecting the Black Sea and Mediterranean Sea. Moreover, we detected genetic differentiation of the Black Sea population based on haplotype frequencies, supporting the previous inferences that the Black Sea common dolphins have been differentiated from those in the Mediterranean and the Atlantic. At the same time, the results suggest that the common dolphins in the Turkish Black Sea and TSS waters might have some degree of genetic connectivity to the Mediterranean and Atlantic populations, as the haplotype network, including the newly discovered ones, do not show any obvious geographical clusters. More samples from the Turkish waters will be sequenced with the same mtDNA marker for a better understanding of the genetic population structure of this species, within the scope of an on-going project, CetaGen.