Histopathological study on kidney and liver of common moorhen (Gallinula chloropus Linnaeus, 1758) as the bioindicator of pollution in anzali wetland

Anzali wetland¡ one of the most important ecosystems¡ located in the south of the Caspian Sea (lat. 37º28΄ N: lon. 49º25΄ E)¡ receives a large amount of urban¡ agronomic and industrial swages. Nonethless it is a main place to brees¡ to grow up and to take winters for waterfowls. Twelve Common Moorhen (Gallinula chloropus Linnaeus¡ 1758) have collected alive from four stations on Anzali wetland¡ during April 2010. Histopathological investigation were shown clear alterations in liver tissues withdegeneration of hepatocytes¡ pigments macrophage aggregation¡ rupture of cells with dilation of diss space¡ congestion and haemorrhage¡ hemosiderin pigments aggregation. Aggregation of leukocyte infiltration¡ capillary dilation¡ hypertrophy¡ degeneration and shrinkage of the cells¡ affected portion of the kidney¡ glomerular expansion and absence of the Bowman’s space¡ tubular epithelial cell hypertrophy¡ were also observed in kidney tissues. Results of the present stude were revealed that kidney and liver tissues of Common Moorhen can be investigated as a pollution bioindicator in Anzali wetland¡ due to their relatively long period of wintering migratory and also high polluted body of ecosystem in Anzali wetland area.