Data/hora: 27/07/2024 02:52:57

Provedor de dados: 	63	
País: 	Brazil	
Título: 	Vitamin A in diets for Nile tilapia	
Autores: 	Campeche,Daniela Ferraz Bacconi; Catharino,Rodrigo Ramos; Godoy,Helena Teixeira; Cyrino,José Eurico Possebon.	
Data: 	2009-12-01	
Ano: 	2009	
Palavras-chave: 	Oreochromis niloticus; Retinol; Nutrition.	
Resumo: 	Dietary vitamin supplementation decrease stress caused by high stocking density, and boosts immunological system of farmed fish. A studied was carried out to determine vitamin A requirements of Nile tilapia (Oreochromis niloticus) in an all male group (13.8 ± 1.2 g) and a mixed sex population (9.8 ± 2.3 g). Fish stocked in 100-L plastic aquaria (26.0 ± 1.0ºC) were fed to near satiety, twice a day, seven days a week, during 75 days with vitamin A-free, semi-purified diets supplemented with 0; 600; 1,200; 1,800; 2,400; 3,000; 3,600; 4,200; 4,800 and 5,400 International Units (IU) of retinyl palmitate (30% vitamin A) per kg of diet in a completely randomized experimental design, factorial arrangement 2c10 (n = 4). Deficiency signs of vitamin A were observed in fish fed 0 to 1.200 IU vitamin A kg-1 diet; moderate signs were observed in fish fed diets with 1.800 to 3.600 IU vitamin A kg-1 diet; no interactions group*level (p &lt; 0.05) were detected. Dietary levels of vitamin A up to 5.400 IU kg-1 influenced final weight and weight gain of fish (p &lt; 0.05), but did not influence feed consumption (p &gt; 0.05). A group effect was observed regarding all performance variables (p &lt; 0.0001). Quantification of hepatic retinol (HPLC) detected vitamin A only in fish fed 5.400 IU retinol kg-1 of diet, therefore characterizing that dietary retinol was used and stored. The quantity of 5.400 IU of retinol kg-1 of diet is recommended for adequate nutrition of Nile tilapia.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600005	
Editor: 	São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"	
Relação: 	10.1590/S0103-90162009000600005	
Formato: 	text/html	
Fonte: 	Scientia Agricola  v.66 n.6 2009	
Fonte: 	info:eu-repo/semantics/openAccess