Effect of food frequency on the growth of the lambari, astyanax bimaculatus (Characiformes, Characidae)

• Autor(a) principal: Santos, Ricardo Pinto dos
• Data de Publicação: 2022
• Outros Autores: França, Caroline Lopes, Sousa, Wanderson Diego Reis, Silva, João Mandú da, Pinheiro, Thiago Ferreira, Teixeira, Erivania Gomes
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Research, Society and Development
• Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/25666
• topic: Reprodução; Nutrição; Piscicultura.; Reproduction; Nutrition; Fish farming.; Reproducción; Nutrición; Piscicultura.

The lambari, Astyanax bimaculatus, is one of the native species with zootechnical potential for aquaculture, and stands out with desirable characteristics for cultivation, therefore, studies regarding the ideal amount of food are necessary to improve the zootechnical performance of the species. Thus, the objective of this study was to evaluate and describe the influence of feeding frequency on the growth of A. bimaculatus. A.bimaculatus dams were captured in a maranhense fish farm, hypophysed in the laboratory with synthetic hormone and then pairs were stocked in a semi-induced spawning system. After hatching, the post-larvae were transferred to a nursery tank for feeding training with commercial feed for 20 days. Afterwards, the fingerlings were submitted to biometry and transferred to experimental units with pre-established treatments, with three different feeding frequencies, two, three, and four times a day, until apparent satiation. The results showed that the natural diet together with the 45%PB commercial feed had a significant influence. The physical and chemical parameters of the water remained within acceptable standards for the species throughout the research, and the zootechnical indices showed linear growth. It was concluded that the growth of A. bimaculatus is influenced by feeding frequency. Considering the weight gain, it is indicated that the fingerlings of A. bimaculatus can reach the best zootechnical performance when fed four times a day. It is noteworthy the improvement in feed conversion resulting from the increase in feeding frequency.