Nematodes, Diesel, Experimental oil spill, Paranaguá Bay, MBACI, Pigments, Biological - analysis, Environmental Monitoring, Estuaries, Biodiversity, Hydrocarbons - analysis, Nematoda - drug effects, Water Pollutants, Chemical - adverse effects, Animals, Hydrocarbons - adverse effects, Population Density, Brazil, Gasoline - adverse effects, Petroleum Pollutio...