RESUMO
The occurrence of Tylodelphys barilochensis, Acanthostomoides apophalliformis, Contracaecum sp. and Camallanus corderoi infecting Galaxias maculatus ("puyenes") was quantified for the first time in Lake Nahuel Huapi, southern Argentina. T. barilochensis was recorded in this lake for the first time. The role of G. maculatus population in transmission of parasites to the salmonids is more important for Contracaecum sp. (prevalence 14-34 per cent) and A. apophalliformis (prevalence 30-54 per cent) than for C. corderoi (prevalence 6-8 per cent). The absence of Diphyllobothrium spp. in samples shows that the G. maculatus population does not play any role in the life cycles of these important zoonotic parasites. The sex of the host had no effect on T. barilochensis abundance. Statistical differences in T. barilochensis abundance between "puyenes" of the same size class between sampling stations and positive correlation between prevalence of infected snails and T. barilochensis abundance in fish suggest that different stocks have been sampled. Factors influencing T. barilochensis abundance are discussed.
Assuntos
Animais , Masculino , Feminino , Helmintos/isolamento & purificação , Salmoniformes/parasitologia , Argentina , Helmintíase Animal/epidemiologia , Platelmintos/isolamento & purificação , Prevalência , Infecções por Trematódeos/epidemiologia , Infecções por Trematódeos/veterináriaRESUMO
The occurrence of Tylodelphys barilochensis, Acanthostomoides apophalliformis, Contracaecum sp. and Camallanus corderoi infecting Galaxias maculatus ("puyenes") was quantified for the first time in Lake Nahuel Huapi, southern Argentina. T. barilochensis was recorded in this lake for the first time. The role of G. maculatus population in transmission of parasites to the salmonids is more important for Contracaecum sp. (prevalence 14-34%) and A. apophalliformis (prevalence 30-54%) than for C. corderoi (prevalence 6-8%). The absence of Diphyllobothrium spp. in samples shows that the G. maculatus population does not play any role in the life cycles of these important zoonotic parasites. The sex of the host had no effect on T. barilochensis abundance. Statistical differences in T. barilochensis abundance between "puyenes" of the same size class between sampling stations and positive correlation between prevalence of infected snails and T. barilochensis abundance in fish suggest that different stocks have been sampled. Factors influencing T. barilochensis abundance are discussed.
Assuntos
Helmintos/isolamento & purificação , Salmoniformes/parasitologia , Animais , Argentina , Feminino , Helmintíase Animal/epidemiologia , Masculino , Platelmintos/isolamento & purificação , Prevalência , Infecções por Trematódeos/epidemiologia , Infecções por Trematódeos/veterináriaRESUMO
En este trabajo se presentan resultados del monitoreo bimestral que se realizó sobre la calidad del agua y los peces en el reservorio del Embalse Piedra del Aguila
Assuntos
Qualidade da Água , Peixes , Energia Hidrelétrica , CongressoRESUMO
Peces de diferentes especies provenientes del embalse de Piedra del Aguila fueron analizados a lo largo de 3 años. Su estado sanitario fue evaluado y la condición parasitológica analizada en profundidad, relacionando la misma con el desarrollo de este lago artificial como nuevo ambiente ecológico. Se registraron cambios en la parasitofauna de algunas especies y se discuten las tendencias observadas