Histopathological survey of chalcalburnus mossulensis gonads infected by ligula intestinalis (cestoda) in Gheshlagh Dam of Sanandaj

Chalcalburnus mossulensis from the cyprinidae family is one of the indigenous fish in Gheshlagh Lake of Kordestan-Iran. Ligula intestinalis is one of the infective parasites of this fish. In this study, the effects of this parasite on gonadal tissue of Chalcalburnus mossulensis, was investigated. For this purpose, 144 fish sample from mentioned species were collected (104 of them were infected by this parasite).After histopathological investigation, In gonads of infected fish, abnormal degenerative changes were seen. These changes were MMC (Melano-Macrophage Center),hemorrhage, atrophy, infiltration, necrosis and decrease of vetilogen. So the spread of this parasite in different water sources should be consider as the point of the maintenance of native species and cultivated fish.