Components of Blood and Blood Cytochemical and Biochemical Characteristics of Three Cartilaginous Fish Species in Orders Orectolobiformes and Myliobatiformes

The results of hematological, cytochemical, and biochemical surveys for fish blood in the specimen Ocellate river stingray Potamotrygon motoro and two specimens of cat sharks including the Halmahera epaulette shark Hemiscyllium halmahera and the grey bambooshark Chiloscyllium griseumare have been reported. A comparison in the parameters analyzed in the survey between the common carp Cyprinus carpio, the wels catfish Silurus glanis, and the sterlet Acipenser ruthenus has been performed. A high percentage of eosinophils involved in antiparasite immunity in the Cartilaginous fishes is recorded. A high content of cationic protein in lysosomes of neutrophils in these fish species can indicate a considerable potent phagocytic activity of the latter. A low amount of alanine aminotransferase in the analyzed shark and ray specimens compared to the bony fish was recorded, which indicate the strength of membranes in hepatocytes and cardiomyocytes.