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1

The nematode parasite, Anguillicola crassus Kuwahara, Niimi et Itagaki, and the monogenean gill parasite, Pseudodactylogyrus anguillae (Yin et Sproston), in eel, Anguilla anguilla (L.), fry

100%
Rolbiecki L., Bartel R., Rokicki J.
Archives of Polish Fisheries
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2008
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tom 16
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nr 2
The aim of the study was to determine the prevalence and intensity of infection of European eel, Anguilla anguilla (L.), with nematode and monogenean gill parasites. Fifty individuals obtained from Vistula Lagoon stocking material were examined in August and October 2006. The prevalence of infection with Pseudodactylogyrus anguillae (Yin et Sproston) in August was 52.4%, and in October 17.2%, while the mean intensity of infection in the same periods was 4.0 and 1.2 individuals, respectively. The prevalence of infection with Anguillicola crassus Kuwahara, Niimi et Itagaki was 4.8 (August) and 20.7% (October), while the mean intensity was 1.0 and 2.5 individuals. Releasing parasite-infected stocking material is harmful from the perspective of fisheries management and simultaneously increases the area of occurrence of the parasites.
2

Pseudodactylogyrus anguillae [Yin et Sproston, 1948] Gussev, 1965 and P. bini [Kikuchi, 1929] Gussev, 1965 [Monogenea: Pseudodactylogyridae] on gills of European eel, Anguilla anguilla [Linnaeus, 1758] ascending rivers of the Pomeranian Coast, Poland

80%
Sobecka E., Pilecka-Rapacz M.
Acta Ichthyologica et Piscatoria
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2003
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tom 33
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nr 2
Background. Monogenean parasites Pseudodactylogyrus anguillae and P.bini were for the first time recorded on eel in 1995. The aim of the present study was to determine their distribution in Poland and to verify their measurements against literature data. Materials and Methods. A total of 201 young eels ascending rivers of Polish Western Pomerania, emptying to the Baltic Sea, were collected and necropsied using commonly used methods. Results. Altogether, 574 monogeneans were found on the gills of the eels studied, of which P. anguillae constituted 82%. Measurements of hard elements of the two species of parasites were similar to those already described from Poland. Conclusion. The present paper constitutes a new record of Pseudodactylogyrus anguillae and P. bini, supported by measurements.
3

Pseudodactylogyrosis in Anguilla anguilla (Actinopterygii: Anguilliformes: Anguillidae): change of control strategies due to occurrence of anthelmintic resistance

61%
Buchmann K., Kania P. W., Neumann L., De'Besi G.
Acta Ichthyologica et Piscatoria
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2011
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tom 41
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nr 2
Background. The European eel, Anguilla anguilla (L.), is considered an endangered species and a series of protective measures have been implemented within the European community in order to enhance natural stocks. Restocking natural habitats with larger eels reared from the glass-eel stage in recirculated farming systems may be one solution. Gill diseases caused by monogenean parasites of the genus Pseudodactylogyrus are currently causing morbidity and mortality in these farms and previously applied standard treatments have recently failed. Therefore the applied control methods should be verified and novel solutions proposed. Materials and methods. Eels infected by Pseudodactylogyrus anguillae were obtained from a typical recirculated eel-culture system which had been treated regularly but recently unsuccessfully with benzimidazole anthelmintics. In the laboratory infected eels were subjected to bath treatments with flubendazole (5 or 10 mg · L–1) or praziquantel (5 or 10 mg · L–1) for 24 h at 25ºC and parasite infections were recorded three days post-treatment. Results. Gill monogeneans, Pseudodactylogyrus anguillae, were not controlled by the anthelmintic flubendazole at any of the dosages tested whereas praziquantel showed a significant effect when used as bath (5 and 10 mg · L–1). Conclusion. The failure of flubendazole for control of pseudodactylogyrosis may result from selection of anthelmintic resistant parasite strains due to use of benzimidazoles for decades. Future treatment regimes during acute outbreaks may be based on praziquantel. A risk for future continued selection for anthelmintic resistance exists and supplementary non-chemical methods (mechanical and biological) in rearing of European eel should be emphasized in the future management practice of eel.
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