Petroleum - adverse effects, Alkanes - analysis, Daphnia - physiology, Chlorophyta - physiology, Water Pollutants, Chemical - analysis, Alkanes - toxicity, Alkanes - metabolism, Daphnia - drug effects, Oncorhynchus mykiss - physiology, Water Pollutants, Chemical - toxicity, Chlorophyta - drug effects, Gas, Natural - analysis, Petroleum - analysis, Gas, Natur...