Data/hora: 06/06/2024 03:42:44

Provedor de dados: 	64	
País: 	Brazil	
Título: 	Methionine plus cystine requirements for the maintenance and efficiency of utilization with tambaqui of different body weights	
Autores: 	Porto,Neliane Galvão; Ribeiro,Felipe Barbosa; Siqueira,Jefferson Costa de; Bomfim,Marcos Antonio Delmondes; Marchão,Rafael Silva; Costa,Dayana da Conceição da.	
Data: 	2020-01-01	
Ano: 	2020	
Palavras-chave: 	Sulfur amino acids; Colossoma macropomum; Factorial method; Amazon fish.	
Resumo: 	ABSTRACT Methionine is an essential amino acid, and generally, the first limiting one in the diets of tambaqui, the main native fish produced in continental aquaculture in South America. However, there is a lack of information on their amino acid requirement, especially for maintenance and efficiency of utilization. The present study aimed to determine the requirement of [methionine plus cystine] for the maintenance and efficiency of utilization using tambaqui of different body weights. Two experiments were carried out using 250 tambaqui with weights of 100 and 300 g. They were distributed in a completely randomized design with four treatment groups (0.264, 0.396, 0.528, and 0.660% of digestible [Met + Cys]), five replications. The control treatment (CT) was performed with the addition of methionine at the first level (0.264%) until the second level was reached (0.396%). The maintenance requirement was determined by the regression analysis between the consumption of [Met + Cys] and protein retention equal to zero. The efficiency was determined using the value of the slope coefficient of the line obtained by the linear regression. The protein and methionine retention values of tambaqui weighing 100 to 300 g were compared by the parallelism test, and no difference was observed between the parameters of the equations indicating the need for only one equation to describe the responses to body weights. The requirement of digestible [Met + Cys] for the maintenance of tambaqui with weights from 100 to 300 g was 60.47 mg kg-0.7 day-1 and the efficiency of utilization of 42%.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100302	
Editor: 	Editora da Universidade Federal de Lavras	
Relação: 	10.1590/1413-7054202044014920	
Formato: 	text/html	
Fonte: 	Ciência e Agrotecnologia  v.44 2020	
Fonte: 	info:eu-repo/semantics/openAccess