Comparative study of some blood respiratory factors between mudskipper, Scartelaos tenuis and mullet, Liza klunzingeri in the Persian Gulf, Hormozgan province

Fish depend on water to supply oxygen demand. Blood plays an important role in oxygen transport. Differences in oxygen uptake, resulting in special blood respiratory factors are arisen from diverse living styles. In this study, blood respiratory factors compared between mudskipper, Scartelaos tenuis, and Liza klunzingeri. Samples were taken from Bandar abbas shore line. Blood sampling was performed from caudal region of fishes. Blood parameters including hemoglobin (Hb), hematocrite (Hct), red blood cell numbers (RBC), mean red blood cell volume (MCV), mean red blood cell hemoglobin (MCH) and mean red blood cell hemoglobin concentration (MCHC) were measured for each species. Results demonstrated that Hct and MCV were significantly higher in L. klunzingeri whereas in S. tenuis, mean value of MCHC was significantly higher. Mean Hb, RBC and MCH were not significantly different between fishes. Considering the lower value of MCV and higher value of MCHC in S. tenuis, it can be concluded that efficiency of oxygen uptake and transport would be higher in compare to L. klunzingeri.