فهرست نشریات علمی دسترسی آزاد ایران

Objective: A study of the effects of triploidy on some haematological indices of rainbow trout.Materials and Methods: Haematological characteristics such as red blood cell (RBC) dimensions, area and volume, RBC and white blood cell counts (WBC), haematocrit (Hct%), hemoglobin (Hb), mean erythrocytic hemoglobin (MEH), mean erythrocytic volume (MEV), mean erythrocytic hemoglobin concentration (MEHC) and RBC abnormalities were measured in 14 and 15 ten month old rainbow trout, respectively.Results: Triploidy significantly increased all morphometric indices containing dimensions, nuclear area and volume of RBCs in compare to diploid fish (p<0.05). The triploid trout had lower numbers with larger RBC sizes. The decrease in RBCs was compensated by an increase in MEV. Thus, triploidy did not affect Hct% (p>0.05). A significant reduction in Hb was observed in triploids (7.4 g/dL) when compared to diploid fish (9.2 g/dL; p<0.05). The MEH values were 82.8 and 116.8 μg/cell in diploids and triploids, respectively (p<0.01). There were no significant differences in MEHC levels between diploids and triploids (p>0.05). Triploids had lower numbers of WBCs and showed higher erythrocytic abnormalities than diploids (p<0.01).Conclusion: Numerous haematological indices of rainbow trout were affected by the ploidy levels, therefore it is expected that optimum culture conditions should vary between diploid and triploid fish.