DETERMINATION OF LYSINE IN FILETS OF “NILE TILAPIA”

• DOI: https://doi.org/10.22533/at.ed.1317632627039

• Palavras-chave: Nile tilapia, protein, lysine, Kjeldahl method.

• Keywords: Nile tilapia, protein, lysine, Kjeldahl method.

• Abstract:

  Lysine is an essential amino acid, important in the composition of collagen, used in the fortification of cereals and protein supplements, in the production of medications, and in the production of animal feed. Given the many uses of this amino acid, “Nile tilapia” (Oreochromis niloticus) fillets become a potential source of lysine. Therefore, the objective of this study was to determine the percentage of lysine in fresh “Nile tilapia” fillets collected at different stages of the species’ development. For this purpose, duplicate samples of fillets were collected. Protein analysis was performed using the Kjeldahl method. The percentage of lysine was obtained by correlating the protein content determined by the method with the sample’s nutritional information. It was found that the juvenile stage has the highest lysine concentration due to increased hormonal activity during this developmental period of the species.