Gouveia, A. .; Oliveira, C. M. D. .; Ferreira Romão, C. .; Marques de Brito, T. .; Fix Ventura, D. . Effects of Trophic Poisoning with Methylmercury on the Appetitive Elements of the Agonistic Sequence in Fighting-Fish (Betta Splendens) . Span. j. psychol. 2007, 10 ,2, 436-448.