title: Frequency of fish tumors found in a polluted watershed as compared to nonpolluted Canadian waters.
mesh_terms: D000818:Animals; D001151:Arsenic / Q000032:analysis; D001551:Benz(a)Anthracenes / Q000032:analysis; D002170:Canada; D002713:Chlorine / Q000032:analysis; D004926:Escherichia coli / Q000302:isolation & purification; D005393:Fish Diseases / Q000453:epidemiology*; D005523:Food Supply; D006846:Hydrocarbons, Halogenated / Q000032:analysis; D007087:Illinois; D007854:Lead / Q000032:analysis; D008628:Mercury / Q000032:analysis; D009369:Neoplasms / Q000453:epidemiology / Q000662:veterinary*; D010100:Oxygen / Q000032:analysis; D010578:Petroleum / Q000032:analysis; D010710:Phosphates / Q000032:analysis; D013431:Sulfates / Q000032:analysis; D013696:Temperature; D014050:Toluene / Q000032:analysis; D014871:Water Microbiology; D014876:Water Pollution; D014877:Water Pollution, Chemical
chemical_list: D001551:Benz(a)Anthracenes; D006846:Hydrocarbons, Halogenated; D010578:Petroleum; D010710:Phosphates; D013431:Sulfates; D007854:Lead; D014050:Toluene; D002713:Chlorine; D008628:Mercury; D001151:Arsenic; D010100:Oxygen