https://www.alice.cnptia.embrapa.br/alice/handle/item/24162 Nota Técnica/Nota científica (CNPASA) 2026-08-12T15:26:45Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1086005 Título: The influence of sex ratio on the reproduction of pirarucu, Arapaima gigas, in captivity. Autoria: LIMA, A. F. Conteúdo: Because sex ratio in the broodstock can influence the reproductive behaviour of a species, the influence of sex ratio on the reproductive success of pirarucu, Arapaima gigas, in captivity was assessed. Pirarucu breeders were stocked in 0.10-0.13 ha earthen ponds at three sex ratios in quadruplicate: one male to one female (1M1F); one male to two females (1M2F); and two males to one female (2M1F). Eight spawning events occurred, seven of them with the 1M1F sex ratio, which was the most successful of the three tested sex ratios. 2018-01-01T00:00:00Z