Genetic features of some cartiliginous species inhabiting Aegean and Mediterranean sea and bio-ecological features of Glaucostegus cemiculus

In this thesis some genetic features of cartiliginous species and bio-ecological features of species Glaucostegus cemiculus from four different areas were examined. Throughout the study in total with Carcharhinus plumbeus, Mustelus mustelus, Mustelus punctulatus, Isurus oxyrinchus, Torpedo marmorata, Dasyatis pastinaca, Gymnura altavela and Squatina squatina 9 species were obtained and 615 individuals were examined. Gene sequences were obtained from tissue samples to investigate some genetic features of individuals. After that they were compared with corresponding species and primer uploaded both from GenBank and Bold system, Neighbor-Joinning trees were created, Network analysis were done and the results were mapped. Besides G. cemiculus genetic features, to be able to examine the bio-ecological features of the species were possiable for all sampling areas, individuals and sexes length-weight relationships, food composition, trophic level, sexual maturity stage and gonadosomatic indice values were estimated. In conclucion, genetic features from each species is a first for Turkish waters. Besides G. cemiculus length-weight relationship there is no other study on the species biology from Turish coasts as well as eastern Mediterranean. The information produced from this thesis is aimed to become basis to understand more clearly the cartiliginous species biology and for its feature conservation biology.