Pathological Study of the Kidney and Histopathologic Alteration Index in Yellowfin Sea Bream (Achantopagrus latus) as a Bioindicator to Trace Contamination Loading of Persian Gulf

Marine pollution is one of the main concerns of countries surrounding the Persian Gulf which receives a great deal of contaminations. In this regard, Histological alterations of kidney in Achanthopagrus latus collected from Musa creek were used to evaluate the effects of pollution on the aquatic organisms. In the present study, 50 A. latus were collected from Five sampling sites in Mussa creek including: 1. Petrochemical, 2. Gaafari, 3. Magidieh, 4. Ghazaleh, 5. Zangi. The kidney of fishes were fixed in Bouin‘s solution for 12 h. The samples were then studied based on the routine histological methods. Histopathological changes in the kidney of A. latus including Glomerular dilatation, reduction of urinary space, melanomacrophages aggregates, occlusion of tubular lumen, tubular degeneration and necrosis. Histopathological alteration index was determined on the basis of frequency of pathological changes in kidney of fishes. The most amount of HAI for kidney of A. latus was observed at the Petrochemical station. The least amount of HAI was related to Zangi station. The results of present study showed that the histopathological alternations of kidney in Achantopagrus latus caused by the Musa creek contamination and there is close relation between amounts of this alterations and the environmental pollution.