Ecological analysis of the ichthyofaunal community ten years after a diesel oil spill at Serra do Mar, Paraná state, Brazil

摘要: Abstract In February 2001, an accidental spill dumped 52,000 litres of diesel oil in Serra do Mar, Parana state, Brazil, contaminating streams. This study aimed to evaluate if fish communities currently inhabiting environments exposed the still showing evidence spill-related impacts. Ichthyofauna were monitored five rivers located region spill. Two sites (Meio and Sagrado rivers) considered treatment sites, three unexposed with environmental characteristics similar (Pinto, Passa Sete Marumbi control sites. Analysis water quality parameters indicated that within more than among rivers. The diversity species composition differed between groups distribution ichthyofaunal likely reflect each river not related contamination resulting from