Trace element concentrations in red swamp crayfish (Procambarus clarkii) and surface sediments in Lake Preola and Gorghi Tondi natural reserve, SW Sicily - A. Bellante; V. Maccarone; G. Buscaino; G. Buffa; F. Filiciotto; A. Traina; M. Del Core; S. Mazzola; M. Sprovieri (Environmental Monitoring and Assessment, 2015)