Estimation of the dietary essential amino acid requirements of colliroja Astyanax fasciatus by using the ideal protein concept

• Main Authors: Wilson Massamitu Furuya, Mariana Michelato, Ana Lúcia Salaro, Thais Pereira da Cruz, Valéria Rossetto Barriviera-Furuya
• Format: Article
• Language: English
• Published: Escuela de Ciencias del Mar, Facultad de Recursos Naturales, Pontificia Universidad Católica de Valparaíso 2015-11-01
• Series: Latin American Journal of Aquatic Research
• Subjects: Astyanax fasciatus; aminoácidos; nutrición; proteína; concepto de proteína ideal; acuicultura
• Online Access: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2015000500008&lng=en&tlng=en

Colliroja, Astyanax fasciatus, is a new aquaculture species, and information on its dietary essential amino acid requirements is lacking. The whole body composition of 120 farmed fish (16.2 ± 8.8 g) was determined to estimate the dietary essential amino acid requirement based on the ideal protein concept ((each essential amino acid/lysine) x100), and the findings were correlated to the whole body essential amino acid content of Nile tilapia Oreochromis niloticus. The dietary essential amino acids, including cysteine and tyrosine, accounted for 5.46, 4.62, 1.16, 3.28, 5.63, 2.01, 2.59, 2.84, 4.66, 3.39, 0.65, and 3.51% of the total protein for lysine, arginine, histidine, isoleucine, leucine, methionine, methionine+tyrosine, phenylalanine, phenylalanine+tyrosine, threonine, tryptophan, and valine, respectively. There were positive linear and high correlations (r = 0.971) between the whole body amino acid profiles of colliroja and Nile tilapia. Thus, the whole body amino acid profile of colliroja might be used to estimate accurately the essential amino acid requirement.