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چکیده
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Tapeworms exist at different levels of the life network of an ecosystem, especially in the digestive system of vertebrates and more specifically in the spiral intestine of cartilaginous fish. It has been shown that the more infected the host, the richer the biodiversity and the healthier the ecosystem, and conversely, the lower the parasite load, the more likely the disruption of the food web. Nine of the 19 orders of tapeworms infect only cartilaginous fish. Of the 5 species of the genus Pateobatis, the pink whipray and Pateobatis jenkinsii are present in the Persian Gulf and the Sea of Oman. Despite the wide distribution, four species of tapeworms have been reported so far from Pateobatis fai. As a result of bycatch a piece of dead pink stingray with a disk wide of 150 cm from the Strait of Hormuz, its tapeworm fauna was investigated. 1247 tapeworms were isolated from its spiral intestine. 87 individuals were stained with Delafield's hematoxylin and the permanent slides were prepared from them. The results showed that the parasites that were obtained belong to five orders, nine genera, and 12 species. The genera Acanthobothrium, Scyphophyllidium, Stillabothrium, Polypocephalus, Divaricobothrium, and Tetragonocephalum are new records from the host and region. Investigations indicate the existence of new species of parasitic genera, so additional studies will be conducted to identify them at the species level.
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