Data/hora: 13/06/2024 17:47:11

Provedor de dados: 	2	
País: 	Brazil	
Título: 	Tolerance of Nile tilapia juveniles to highly acidic rearing water	
Autores: 	Rebouças, Vanessa Tomaz; Lima, Francisco Roberto dos Santos; Cavalcante, Davi de Holanda; Sá, Marcelo Vinícius do Carmo e.	
Data: 	2015-08-05	
Ano: 	2015	
Palavras-chave: 	Piscicultura; Tilápia aquaculture; Oreochromis niloticus; Acidophilic fish; Ammonia; PH.	
Resumo: 	The present work aimed at determining the tolerance of Nile tilapia juveniles to highly acidic rearing waters and the effects of water acidity on the quality of tank effluents. The experimental design consisted of four treatments with different water pH values (4.12 ± 0.84; 5.13 ± 0.74; 6.14 ± 0.64 and 8.06 ± 0.48), with five replicates each. No exchange of water was performed throughout the study, only water replenishment to maintain the initial level. Variables of water quality, soil, growth performance, metabolism and effluents were monitored for eight weeks. Despite the lower total ammonia nitrogen (TAN) concentration in the pH 8 tanks, their levels of non-ionized ammonia (NH3) were the highest ones. At the end, the lowest body weight of fish was observed in the pH 8 tanks. There was a significant improvement in feed conversion ratio (FCR) and protein efficiency ratio (PER) due to to water acidification. There were reduced concentrations of NH3 in the acidified tanks’ effluents. It was concluded that the gradual water acidification up to pH 4 can improve the Nile tilapia juveniles’ growth performance. 	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/27031

10.4025/actascianimsci.v37i3.27031	
Editor: 	Editora da Universidade Estadual de Maringá	
Relação: 	http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/27031/pdf_96	
Formato: 	application/pdf	
Fonte: 	Acta Scientiarum. Animal Sciences; v. 37, n. 3 (2015); 227-233

Acta Scientiarum. Animal Sciences; v. 37, n. 3 (2015); 227-233

1807-8672

1806-2636