Patterns of distribution and accumulation of trace metals in Hysterothylacium sp. (Nematoda), Phyllodistomum sp. (Digenea) and in its fish host Hoplias malabaricus, from two neotropical rivers in southeastern Brazil

Lucas Aparecido Rosa Leite, Walter dos Reis Pedreira Filho, Rodney Kozlowiski de Azevedo, Vanessa Doro Abdallah