Data/hora: 01/06/2024 14:52:03

Provedor de dados: | 96
País: | Brazil
Título: | Digestible methionine + cystine requirement for Nile tilapia from 550 to 700 g
Autores: | Michelato,Mariana; Furuya,Wilson Massamitu; Graciano,Themis Sakaguti; Vidal,Luiz Vítor Oliveira; Xavier,Tadeu Orlandi; Moura,Lorena Batista de; Furuya,Valéria Rossetto Barriviera.
Data: | 2013-01-01
Ano: | 2013
Palavras-chave: | Amino acids; Body composition; Fillet yield; Fish; Performance; Plasmatic lipid pattern.
Resumo: | This trial was conducted to determine the dietary digestible methionine + cystine requirement of Nile tilapia (550 to 700 g) based on the ideal protein concept. Six hundred fish were distributed in a completely randomized design with five treatments and four replicates, with 30 fish per experimental unit. The fish were fed diets containing approximately 262 g of digestible protein/kg, 3,040 kcal of digestible energy/kg and 7.90, 9.40, 10.90, 12.40 or 13.90 g of methionine + cystine/kg. The fish were hand-fed three times a day until apparent satiation for 30 days. No effects of dietary methionine + cystine on feed conversion ratio, daily protein deposition, whole body moisture, fillet moisture, crude protein, ether extract and ash, plasmatic HDL and LDL cholesterol were observed. Dietary methionine resulted in a linear increase in whole body protein and linear reduction in lipid deposition rate, hepatosomatic index, whole body ether extract and ash, plasmatic total cholesterol, plasmatic total lipids and plasmatic triglycerides. According to the Linear Response Plateau, the daily weight gain and fillet yield increased up to a level of 9.00 and 9.90 g methionine + cystine/kg of diet, respectively. The digestible methionine + cystine requirement of Nile tilapia is 9.00 g/kg for weight gain and 9.90 g/kg for fillet yield, corresponding to methionine + cystine:lysine ratios of 0.60 and 0.66, respectively.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000100002
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/S1516-35982013000100002
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.42 n.1 2013
Fonte: | info:eu-repo/semantics/openAccess