Estimation of the ideal dietary essential amino acid pattern for pacu (Piaractus mesopotamicus) in the later-juvenile growth phase

An animal's rate of protein accretion (or nitrogen retention) is determined by the most deficient (or first limiting) amino acid in the diet, in a perfectly balanced (or ideal) protein all essential amino acids and the sum of the non-essential amino acids are equally limiting. If a dietary protein had any amino acids in excess of the ideal pattern, then the removal of any of the excess should not affect nitrogen retention. This principle was used to determine the ideal dietary amino acid pattern for growing pigs.Three nitrogen balance trials were carried out with a total of 64 gilts of weight from 30 to 55 kg. Casein and a mixture of amino acids were used in the semi-purified diets. The animals were given the diets at the rate of 93 g/kg BW0.75/d in three equal meals mixed with 0.3 L water. The feeding times were 08.30, 12.30 and 17.30. All pigs received their experimental diets for 7 days, made up of 3 days preliminary and a 4-day collection, except that the preliminary period before the first collection in the first period was 7 days. Before the first collection bladder catheters were introduced.

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Effect of the dietary essential amino acid pattern on growth, feed utilization and nitrogen metabolism of European sea bass (Dicentrarchus labrax)

Aquaculture ◽

10.1016/j.aquaculture.2007.01.010 ◽

2007 ◽

Vol 267 (1-4) ◽

pp. 119-128 ◽

Cited By ~ 36

Author(s):

Helena Peres ◽

Aires Oliva-Teles

Keyword(s):

Amino Acid ◽

Nitrogen Metabolism ◽

Essential Amino Acid ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

Feed Utilization ◽

Amino Acid Pattern ◽

European Sea Bass

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

Latin American Journal of Aquatic Research ◽

10.3856/vol43-issue5-fulltext-8 ◽

2017 ◽

Vol 43 (5) ◽

pp. 888-894

Author(s):

Wilson Massamitu Furuya ◽

Mariana Michelato ◽

Ana Lúcia Salaro ◽

Thais Pereira da Cruz ◽

Valéria Rossetto Barriviera-Furuya

Keyword(s):

Amino Acid ◽

Essential Amino Acid ◽

Nile Tilapia ◽

Amino Acid Content ◽

Whole Body ◽

Amino Acid Requirement ◽

Astyanax Fasciatus ◽

Amino Acid Requirements ◽

Ideal Protein ◽

The Ideal

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) ×100), 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.

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