2017-03-162017-03-162016-08SALES, Abner Dias et al. Fotoperíodo e frequência alimentar na larvicultura do peixe beta. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 68, n. 4, p. 1062-1068, jul./ago. 2016 Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000401062&lng=pt&nrm=iso>. Acesso em: 16 mar. 2017. <http://dx.doi.org/10.1590/1678-4162-8746>.1678-4162https://repositorio.ufpa.br/handle/2011/7878The aim of this study was to evaluate the growth, uniformity and survival of Betta splendens larvae, submitted to different photoperiods and feeding frequency. Four hundred and eighty individuals (4.53mg ± 0.32 and 5.51 ± 0.58mm) were randomly distributed into 48 plastic containers (1L) at a density of 10 larvae/L. A completely randomized design was used, with four replications in a factorial 6 x 2, six photoperiods (0L:24D, 6L:18D, 12L:12D, 16L:8D, 20L:4D, 24L:0D) and two feeding frequencies (two or four times a day). The larvae were fed performed with Artemia nauplii at averaging 800/ larvae/ day, for 15 days. Beta larvae subjected to photoperiod 12L:12D and 16L:8E showed the greatest weight gain (P<0.10), while those fed four times daily had greater length growth and uniformity (P<0.10). However, individuals fed four times daily had lower survival when subjected to photoperiod 16L:8E, 20L:4L and 24E:0D (P<0.10). On the other hand, larvae subjected to a photoperiod of 12L:12D, 16L:8L and 20L:4E showed higher survival rate when fed twice a day (P<0.10). Therefore, with the intention of better growth, uniformity and survival of Betta splendens larvae, it is recommended that the hatchery in this species be done under a photoperiod of 12L: 12D with supply of Artemia nauplii twice daily.Acesso AbertoLarviculturaPeixe ornamentalFotoperíodoBetta splendensPisciculturaEngenharia de pescaLarvas de peixeArtigo de Periódico