Data/hora: 01/06/2024 04:43:36

Provedor de dados: | Acta Scientiarum: Animal Sciences
País: | Brazil
Título: | Interaction between feeding rate and area for periphyton in culture of Nile tilapia juveniles - doi: 10.4025/actascianimsci.v34i2.12469
Autores: | Rebouças, Vanessa Tomaz; Universidade Federal do Ceará; Caldini, Nayara Nunes; Universidade Federal do Ceará; Cavalcante, Davi de Holanda; Universidade Federal do Ceará; Silva, Francisco Jackes Rodrigues da; Universidade Federal  do Ceará; Sá, Marcelo Vinícius do Carmo e; Universidade Federal  do Ceará.
Data: | 2012-03-22
Ano: | 2012
Palavras-chave: | Tilapia; Fish culture; Semi-intensive system; Productivity; Water quality.
Resumo: | The objective of the present work was to determine the effects of the interaction between feeding rate and area for periphyton in rearing aquaria for Nile tilapia. Twenty 25 L polyethylene outdoor aquaria were used to hold experimental fish. Three tilapia fingerlings (2.56 ± 0.14 g) were stocked in each aquarium for five weeks (12 fish m-2). There were two different feeding rates (full and full minus 30%) and two submerged areas for periphyton development (59.4% and 96.5% of the aquarium surface area; n = 5). Final body weight, specific growth rate and yield in the 96.5%-area aquaria of fish submitted to 30% less feed were significantly higher than in the 96.5%-area aquaria submitted to full feeding rates. Fish growth in the restricted-feed aquaria was favored by their better water quality (higher pH and lower total ammonia nitrogen). There were negative effects on final body weight, SGR, yield and feed conversion ratio of fish in full-feed aquaria when the area for periphyton increased from 59.4 to 96.5%. It was concluded that the combination of restricted feeding rates with large substrate areas for periphyton growth results in better water quality for fish culture than the adoption of each management alone.
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12469

10.4025/actascianimsci.v34i2.12469

Editor: | Editora da Universidade Estadual de Maringá

Formato:

application/pdf

application/pdf

Fonte:

Acta Scientiarum. Animal Sciences; v. 34, n. 2 (2012); 161-167

Acta Scientiarum. Animal Sciences; v. 34, n. 2 (2012); 161-167

Fonte:

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DECLARAÇÃO DE ORIGINALIDADE E CESSÃO DE DIREITOS AUTORAIS  Declaro que o presente artigo é original, não tendo sido submetido à publicação em qualquer outro periódico nacional ou internacional, quer seja em parte ou em sua totalidade. Declaro, ainda, que uma vez publicado na revista Acta Scientiarum. Animal Sciences, editada pela Universidade Estadual de Maringá, o mesmo jamais será submetido por mim ou por qualquer um dos demais co-autores a qualquer outro meio de divulgação científica. Através deste instrumento, em meu nome e em nome dos demais co-autores, porventura existentes, cedo os direitos autorais do referido artigo à Universidade Estadual de Maringá e declaro estar ciente de que a não observância deste compromisso submeterá o infrator a sanções e penas previstas na Lei de Proteção de Direitos Autorias (Nº9609, de 19/02/98).