Influences of artificial and natural eggs incubation systems on the productive traits of São Paulo state greater Rhea (Rhea americana) breeders - Almeida, M. A; Nichi, Marcilio; Góes, Paola Almeida de Araújo; Cavalcante, Ana Karina da Silva; Barnabe, Valquiria Hyppólito; Ferrari, S (International Congress on Animal Reproduction, 2004)