Digenean trematodes (Trematoda: Digenea) parasitizing the digestive system of the great cormorant () in Hungary.

Great cormorants () are widespread piscivorous birds, which cause huge economic losses in the fish fauna worldwide. As a consequence of their predatory behaviour, they serve as definitive hosts for many digenean trematodes, and their digestive systems usually contain several parasite species. Between 2019 and 2022, 131 bird carcasses were collected from Biharugra (Hungary) as culling on the cormorant population.

Pathological effects of Thaparocleidus vistulensis (Siwak, 1932) infection on the gills of Silurus glanis Linnaeus, 1758.

Histopathological alterations caused by Thaparocleidus vistulensis (Siwak, 1932) on the European catfish Silurus glanis Linnaeus, 1758 were investigated by histopathology and scanning electron microscopy (SEM). The pathological effects of T. vistulensis on the gills of the European catfish were mainly related to the attachment sites of the parasite to its host, but damage also affected adjacent structures.

Two new myxozoan parasites, Myxobolus mayarum n. sp. and Kudoa mayarum n. sp., infecting the neotropical fish Mayan Cichlid, Mayaheros urophthalmus (Günther, 1862) in the Yucatán Peninsula, Mexico.

The biodiversity of freshwater fishes is extensive in Mexico; however, knowledge of their associated myxozoan parasites is limited. This study aimed to recognize myxozoan parasites in the endemic fish Mayaheros urophthalmus. Two new species, Myxobolus mayarum n.

Influences of light-dark cycle and water temperature on in vitro egg laying, hatching, and survival rate of the Thaparocleidus vistulensis (Dactylogyridea: Ancylodiscoididae).

The European catfish (Silurus glanis) is an important species with high economic value, and its growing demand has led to intensive farming practices for it. However, this species is increasingly challenged by parasitic infections, particularly from a specific gill monopisthocotylan parasite called Thaparocleidus vistulensis. To establish effective management strategies, it is crucial to comprehend the fundamental environmental variables that could influence the reproductive and survival behavior of T.