Differential Leucocyte Count of Reared Beluga (H.huso) at Different Ages (Fry, Juvenile and Brood stock)

The analysis of blood parameters is a useful indicator in assessing the physiological conditions of aquatic animals in response to stress, pollutants, nutrition, and also physiological and ecological changes. In this study differential leucocyte count of Huso huso in three age classes including frys, juveniles and brood stocks were studied in International Sturgeon Research Institute in a six-month period (spring and summer) in 2012. For this reason, 30 Huso huso (10 frys, 10 juveniles, 5 males and 5 females) were used. Statistical results showed significant differences in WBC, lymphocyte (%), neutrophil (%) monocyte (%) and eosinophil (%) in different ages (P<0.05). There was no significant difference between brood stocks (P>0.05) and percent of lymphocyte and neutrophil was higher than in males whereas in females percent of eosinophil and monocyte was higher. Based on the results, it can be declared that parameters such as age and sex can be more effective on hematological indices.