The Effect of Phenanthrene on Some Hematological Indices Yellowfin Seabream (Acanthopagrus Latus)

Background: We examined the effects of phenanthrene (Phe) on hematological parameters of yellowfin seabream (Acanthopagrus latus). Methods: The research was carried out in Jan 2016 at Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran. Fish were injected with different concentrations (0, 2, 20 and 40 mg/kg) of Phe and blood, samples were taken from fish 1, 4, 7 and 14 d after injection. Results: Results of Phe-treated fish showed a decrease in red blood cell and white blood cell counts, hematocrit amount after 4 d and in hemoglobin concentration after 7 d (P<0.05). Mean corpuscular hemoglobin concentration was enhanced in fish exposed to Phe up to day 4 (P<0.05). Phe-exposed fish showed an increase in the percentage of neutrophils with a decrease in the percentage of lymphocytes (P<0.05) and did not represent any effects on percentage of monocytes and eosinophils, mean corpuscular volume and mean corpuscular hemoglobin concentration. Conclusion: Changes in hematological parameters after exposure to Phe result in a decrease of non-specific immunity.