Co-ocurrence of two toxic dinoflagellates in Acapulco Bay, Guerrero, Mexico: an opportunity to quantify their biology and ecology Údair: Meave del Castillo, María Esther, Zamudio-Reséndiz, María Eugenia, Castillo-Rivera, Manuel Arnoldo, Gutiérrez-Mendieta, Francisco José, Varona-Cordero, Francisco, Hernández-Cárdenas, Gilberto