Parasitic Fauna of Tenualosa Ilisha (Hamilton- Buchanan, 1822) As a Biological Indictor of Fish Immigration In Iraqi Waters
In total, 1,456 specimens (428 males, 534 females and 494 unidentified small individuals) of T. ilisha were collected between, Jan. 2013 and Dec, 2014, 20 specimens of each monthly sample are isolated of the study area. Five stations were chosen, starting from the city of Al-FAW in the estuary section of the river to the northern-most station in the Al Hammar Marshs (The current study was completed within the scientific team of the study the migration and the biological of Tenualosa ilisha fishes). The study uses' the Parasite as biological tags of fish immigration, three specie's of parasite are described: Nothobomolochus sp. (copepod); Faustula sp and Ectenurus papillatus (digenea). The result of present study refers that the parasites were collected are appears only in the, starting from the city of Al-FAW in the estuary section of the river with total length 250-460 in male and female with Faustula sp and Ectenurus papillatus (digenea), and Nothobomolochus sp. (copepod), and there are not any infected with unidentified small individuals) of T. ilisha. The result refers also the Parasites are considered as new records in Iraqi marine fishes. Also, result of infected are compared with the type of parasites infection in Indian ocean fishes, and the results give us two important points, there are different in the type of parasite in to region and the infected are occur depend on the ecology and habitat feeding, and that led to the fishes don’t emigrate from the Indian Ocean to Iraq or that the fish lose the types of parasites during migration, and fishes is likely to be endemic in the Arab Gulf region.