The mixture of PPB was sprayed on commercial tilapia and shrimp pellets (32% protein), both from Purina® (Ciudad Obregón, Mexico), at a concentration
of 500,000 CFU g-1 (100,000 CFU/strain). A feed additive, Dry Oil® (DO, Innovaciones Acuícolas S.A. de C.V., Culiacán, Mexico) was used as an adhesive
and a feed attractant, following the manufacturer’s instructions.