Comprehensive analysis of the chemical content of tuna fish skin, including fatty acids, heavy metals, proximate content, and amino acids from Kendari, Indonesia

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Detalles Bibliográficos
Publicado en:	Aquaculture, Aquarium, Conservation & Legislation vol. 18, no. 4 (Aug 2025), p. 1731-1743
Autor principal:	Huli, La O
Otros Autores:	Pringgenies, Delianis, Dewi, Eko N, Riyadi, Putut H
Publicado:	Bioflux SRL
Materias:	Indonesia Mercury Glutamic acid Arginine Amino acids Fish Nickel Phytochemicals Heavy metals Fish skin Cadmium Arachidonic acid Scientific imaging Moisture content Chromatography Tuna Meat Saponins Proteins Linolenic acid Linoleic acid Fatty acids Arsenic Proline Oleic acid Processing industry Glycine Docosahexaenoic acid Water content Flavonoids Ash content Eicosapentaenoic acid Fish oils Nutritive value Marine fishes Nutrient content Mass spectrometry Food sources Raw materials Heavy metal content Body condition Fishing Phenolic compounds Thunnus obesus Environmental
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Descripción
Resumen:	The fishing and tuna processing industry in the waters of Kendari has been generating fish skin waste, which has been discarded so far. However, it has been found that tuna skin waste contains nutritional content similar to that of tuna meat. The research aimed to analyze the chemical content of tuna skin waste in Kendari, Indonesia, including fatty acids, heavy metals, proximate content and amino acids. The results revealed that Thunnus obesus (bigeye tuna) loin skin waste had the highest percentage of water content at 55.62%. The fish skin waste has a protein content of 26.175%, a fat content of 10.10%, and an ash content of 5.375%. Further analysis of the fatty acid profile of T. obesus loin skin waste revealed that it contains 6.32% unsaturated fat and 3.78% saturated fat. The dominant omega-9 fatty acid is oleic acid at 2.35%. Although it contains omega 6, arachidonic acid, linoleic acid, docosahexaenoic acid, linolenic acid, and eicosapentaenoic acid, each fatty acid does not exceed 1%. Additionally, the analysis showed that T. obesus loin skin waste has relatively low levels of heavy metals, with arsenic at 1.79%, lead at 0.36%, mercury at 0.6%, and cadmium at 0.03%. Nickel was not detected in this fish skin waste. Meanwhile, analysis of the protein content reveals that glycine has the highest level at 55,927.53 mg kg-1, followed by L-arginine, L-proline, and L-glutamic acid. However, based on the phytochemical analysis results, flavonoid, phenolic, and saponin compounds were not detected in the skin waste. Thus, the skin waste of T. obesus loin in Kendari, Indonesia, has nutritional value and is relatively low in heavy metal content. Therefore, the skin of this fish can be further utilized as a nutritious food source, similar to tuna fish meat.
ISSN:	1844-8143 1844-9166
Fuente:	Environmental Science Database