Abstract
The life cycle of the digenetic trematode Clinostomum complanatum was studied on the floodplain of the high Paraná river, Brazil. Sampling was done between June 1999 and June 2000. The mollusc Biomphalaria peregrina was the first intermediate host with a prevalence of infection of 0.75%. The fish Loricariichthys platymetopon, Hoplosternum littorale, Parauchenipterus galeatus, Hoplias malabaricus and Loricaria sp. were second intermediate hosts, with the prevalence varying from 2.45% (H. malabaricus) to 60.8% (L. platymetopon). The birds Ardea cocoi, Phalacrocorax brasilianus, Egretta alba and Egretta thula were definitive hosts, with the prevalence ranging between 5.5% (E. thula) and 95% (A. cocoi). The high prevalences in birds, especially in A. cocoi, suggest some kind of mechanism facilitating the predation of infected fish. The importance of the various hosts is discussed, and it is concluded that the floodplain of the high Paraná river has suitable conditions for the maintenance of the life cycle of C. complanatum.
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Acknowledgements
The authors thank Prof. M. Ostrowsky de Núñez, from the Faculty of Exact and Natural Sciences of Buenos Aires, Argentina, for the critical reading of the manuscript, Prof. E. Luz, from the Federal University of Paraná, Brazil, for the identification of the molluscs, and the IBAMA for hunting permission. All of the experiments comply with the current laws of the country in which the experiments were performed.
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Dias, M.L.G.G., Eiras, J.C., Machado, M.H. et al. The life cycle of Clinostomum complanatum Rudolphi, 1814 (Digenea, Clinostomidae) on the floodplain of the high Paraná river, Brazil. Parasitol Res 89, 506–508 (2003). https://doi.org/10.1007/s00436-002-0796-z
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DOI: https://doi.org/10.1007/s00436-002-0796-z