02453nab a2200361 a 4500 AR-ReUNN 20260702003057.0 260630s2006 ag |||||||||||||||||eng eng Groves, Phillip a. 147563 Carrasco-Letelier, Leonidas 147564 Eguren, Gabriela 147565 Teixera de Mello, Franco 147566 Preliminary field study of hepatic porphyrin profiles of Astyanax fasciatus - Teleostei, Characiformes - to define anthropogenic pollution / Leonidas Carrasco-Letelier ...[et al.]. 2006 8 páginas Disponible en caja 17 no 4 de INICNE The 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. Astyanax Fasciatus 147484 Toxicología 9207 Toxicity 147043 Contaminantes Ambientales 128579 Pollution 134475 Peces de Agua Dulce 6471 Inland Waters 117440 Freshwater Fish 117439 Argentina 4258 Uruguay 4640 Chemosphere v. 62 n. 8 (2006) 234694 ART (INICN)36073 234695 234695 234695 AR-ReUNN spa AR-ReUNN aacr2