Effects of Feeding Frequency for Nile Tilapia Fingerlings (Oreochromis niloticus)

• Autor(a) principal: Fava, Aldo Felipe
• Data de Publicação: 2022
• Outros Autores: De Souza Bezerra, Gildete, Neu, Dacley Hertes, Bittencourt, Fabio, Signor, Altevir, Carvalho, Kerolay Valadão, Gomes, Ricacio Luan Marques [UNESP], Boscolo, Wilson Rogério
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1155/2022/1053556; http://hdl.handle.net/11449/247990

This study is aimed at assessing the feeding frequency for tilapia fingerlings. 240 fishes were randomly distributed in 24 containers. The feeding consisted of six frequencies: 4 (F4), 5 (F5), 6 (F6), 7 (F7), 8 (F8), and 9 (F9) times a day. The weight gain was significantly higher in F5 and F6 when compared to F4 (p=0.0409 and 0.0306, respectively). Feed intake and apparent feed conversion did not differ between treatments (p=0.129 and p=0.451). About water quality, the nitrogen levels in the water from the treatments differed between F4 and F5 (p=0.0478) and F4 and F6 (p=0.0283) and for P between F4 and F6 (p=0.0215) and F4 and F9 (p=0.0432). The x2 test showed a dependence relationship between feed frequencies and the muscle fibers frequency (p<22×10-17), prevailing fibers between 10-20 micrometers in F4, F5, F6, and F7 and 30-40 in F8 and F9. The area of the hepatocytes differed only between F5 and F9, while the nucleus area did not. Partial net revenue differed in 10% between F5 and F4 (p=0.0812) and between F6 and F4 (p=0.0568). In conclusion, fingerlings fed 5 to 6 times a day have better zootechnical and partial recipes.