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• W279890129 abstract "espanolLos sistemas acuaticos se ven afectados por una gran variedad de actividades antropogenicas que alteran la calidad del agua a traves de la introduccion de contaminantes organicos e inorganicos, por consiguiente, afectan a todos los niveles de la comunidad biologica. De esta forma, la relacion entre la diversidad de especies de parasitos y la contaminacion organica en la cuenca del alto Parana, Parana, Brasil, se investigo en dos temporadas (invierno y verano) de 2011. Un total de 114 tetra cola roja (Astyanax aff. paranae Eigenmann, 1914) se muestrearon en un sitio no impactado (Reserva Perobas) y en regiones impactadas (zonas agricolas y urbanas, aguas arriba y aguas abajo de la ciudad de Campo Mourao, respectivamente). El nematodo Spinitectus yorkei Travassos, Artigas y Pereira, 1928 se encuentran en la zona protegida, mientras que el nematodo Procamallanus (Spirocamallanus) inopinatus Travassos, Artigas y Pereira, 1928 se encuentran solo en las zonas gravemente contaminadas. La variabilidad del indice de prevalencia sugiere que la estructura de la comunidad de parasitos se ve afectada en diferentes formas por el mismo nivel de contaminantes en el agua. Los resultados observados asumen que la alteracion en la diversidad parasitaria puede estar relacionada con el aumento de la contaminacion organica, y que la respuesta de la comunidad de parasitos a las tensiones ambientales puede ser utilizada como bioindicadora. EnglishAquatic systems are affected by a great variety of anthropogenic activities that alter the water quality through the introduction of organic and inorganic pollutants, consequently impacting all trophic levels of a biological community. The relationship between parasite species diversity and organic pollution in the high Parana River basin, Parana, Brazil was investigated during two seasons (Winter and Summer) of 2011. A total of 114 red-tail-lambari (Astyanax aff. paranae Eigenmann, 1914) were sampled from a non-impacted location (Perobas Reserve) and from impacted regions (agricultural and urban regions, upstream and downstream the city of Campo Mourao, respectively). The nematode Spinitectus yorkei Travassos, Artigas & Pereira, 1928 was found on the preserved area, while the nematode Procamallanus (Spirocamallanus) inopinatus Travassos, Artigas & Pereira, 1928 was found only on the severely polluted areas. The variability of the prevalence index suggests that the structure of the parasite community is affected at different ways by the same levels of pollutants on the water. The observed results assume that the alteration in parasite diversity can be related to increased organic pollution, and that the differences in the parasite community from different environments can be related to biotic stress." @default.
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• W279890129 date "2013-01-01" @default.
• W279890129 modified "2023-10-01" @default.
• W279890129 title "Diversity of Nematodes of red-tail-lambari Astyanaxaff. Paranae (Teleostei: Characidae) from polluted sites of atropical river system." @default.
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