An investigation on protein and amino acid contents in scales and muscles of pomfret Parastromateus niger (Bloch, 1795) and Pampus argenteus (Eupharasen, 1788)

• Published in: Brazilian journal of biology 2024, Vol.84, p.1-10
• Main Authors: Razzaq, W., Masood, Z., Hassan, H. U., Benzer, S., Nadeem, K., Arai, T.
• Format: Article
• Language: English
• Subjects: Amino acids; BIOLOGY; Collagen; Commercial fishing; Composition; crude protein; Fish; Fisheries; Fishing; Histidine; Lysine; Methionine; Muscles; Pampus argenteus; Parastromateus niger; Pomfret species; Proteins; scales; Species; Threonine; Tryptophan
• ISSN: 1519-6984; 1678-4375; 1678-4375
• DOI: 10.1590/1519-6984.258880

Abstract The present investigation was aimed to examine the percentage quantity of protein and amino acids in scales and muscles of Pampus argenteus and Parastromateus niger gathered from the local fish market of district Quetta of Balochistan. About 80 specimens of these two species, i.e., Pampus argenteus (N=40) and Parastromateus niger (N = 40), were collected from April 2017 to May 2018. In general, crude protein content was high in scales, that is, 71.03% in Parastromateus niger and 52.11% in Pampus argenteus, as well as in muscles of two Pomfret species of fishes i.e., 63.44% in Pampus argenteus and 60.99% in Parastromateus niger on a dry-weight basis, respectively. Likewise, the muscles and scales of Parastromateus niger reveal well compositions of amino acids that include proline was found to be high, and methionine was less than other amino acids, whereas threonine was found high in the scales of Pampus argenteus, but methionine was observed in lesser amount. However, the amino acids found in Pampus argenteus muscles also showed different compositions, such as lysine was found to be high, but histidine was less, respectively. In comparison, amino acids like tryptophan and cysteine were not detected in both scales and muscles of thesePomfret species of fishes. Thus, this study was based on analyzing the utilization of both Pomfret species of scales and meat whether they could have values as good supplements of both protein and certain kinds of essential amino acids in animal diets. Resumo A presente investigação teve como objetivo examinar a quantidade percentual de proteínas e aminoácidos em escamas e músculos de Pampus argenteus e Parastromateus niger coletados no mercado de peixes local do distrito de Quetta, no Baluchistão. Cerca de 80 exemplares dessas duas espécies, ou seja, Pampus argenteus (N=40) e Parastromateus niger (N=40), foram coletadas de abril de 2017 a maio de 2018. Em geral, o teor de proteína bruta foi alto em escamas, ou seja, 71,03% em Parastromateus niger e 52,11% em Pampus argenteus, bem como em músculos de duas espécies de peixes Pomfret, ou seja, 63,44% em Pampus argenteus e 60,99% em Parastromateus niger em base de peso seco, respectivamente. Da mesma forma, os músculos e escamas de Parastromateus niger revelam que as composições de aminoácidos que incluem prolina são altas, e a metionina é menor do que outros aminoácidos, enquanto a treonina foi encontrada alta nas escamas de Pampus argenteus, mas a metionina foi observad