02503nab a2200373 a 4500003000900000005001700009008004100026041000800067100003100075700004000106700002900146700003700175245018500212264000900397300001600406500004100422520127900463650003101742650002401773650002101797650003801818650002201856650003001878650002601908650002801934650002001962650001801982773004302000942000802043035001702051001000702068999001902075040003502094AR-ReUNN20260702003057.0260630s2006    ag |||||||||||||||||eng  0 aeng1 aGroves, Phillip a.91475631 aCarrasco-Letelier, Leonidas91475641 aEguren, Gabriela91475651 aTeixera de Mello, Franco914756610aPreliminary field study of hepatic porphyrin profiles of Astyanax fasciatus - Teleostei, Characiformes - to define anthropogenic pollution / Leonidas Carrasco-Letelier ...[et al.]. 1c2006  a8 páginas  aDisponible en caja 17 no 4 de INICNE  aThe implementation of eco-toxicological assessment in South America is presently limited due to significant scientific information gaps concerning native species and their potential use as biomarkers. Recently, a common southern hemisphere fish species, Astyanax fasciatus, has been pointed out as a potential bio-indicator to anthropogenic pollution. This is a small, abundant, Neotropical characid, which is widely distributed from Central America south, to the Rio de la Plata Basin of western Uruguay. Our study found a statistically significant increase of coproporphyrin, uroporphyrin and protoporphyrin concentrations in hepatic tissues of A. fasciatus collected from a stream segment with high anthropogenic disturbance (due mainly to agricultural derivatives and motor vehicle transportation activities). Although the area studied showed differences in up and downstream limno-chemical parameters, these differences were not related to the increase of hepatic porphyrin concentrations. Based on the results of our study, we conclude that A. fasciatus is a good bio-indicator of exposure to environmental contaminants, and we propose that this abundant fish species be considered as a sentinel organism for monitoring potential disturbances to freshwater ecosystems. 4aAstyanax Fasciatus9147484 4aToxicología99207 4aToxicity9147043 4aContaminantes Ambientales9128579 4aPollution9134475 4aPeces de Agua Dulce96471 4aInland Waters9117440 4aFreshwater Fish9117439 4aArgentina94258 4aUruguay946400 tChemospheregv. 62 n. 8 (2006)w234694  cART  a(INICN)36073234695  c234695d234695  aAR-ReUNNbspacAR-ReUNNeaacr2