Evaluación de los niveles de selenio en peces de alto valor comercial en diversos ambientes acuáticos en el norte de Colombia

Contextualization: selenium (Se) is one of the essential metalloids for the correct functioning of organisms, and is widely distributed in nature. In adequate concentrations it is important because it helps to improve the reproductive system and strengthens the immune system. In contrast, in high concentrations it can have adverse effects. This dual role played by Se makes it of particular interest to the scientific community.

Knowledge gaps: high concentrations of Se in aquatic ecosystems seem to be of concern to the scientific community, due to the impacts they can have on human health and ecosystems. However, little is known about its behavior in relation to its concentrations in freshwater fish.

Objective: to evaluate Se concentrations in fish of high commercial value in different aquatic ecosystems in the north of Colombia, which allow us to establish the basis for the levels of contamination with this element.

Methodology: Se concentrations in muscle tissue of commercially valuable fish were analyzed at six sites, including reservoirs and rivers located in four departments in northern Colombia. Fish samples were obtained by direct purchase from local fishermen at each site. Concentrations were analyzed by atomic fluorescence spectrometry coupled to hydride generation.

Results and conclusions: a total of 309 fish samples were analyzed and were represented by 28 species. Of the total number of fish analyzed, 27% or 84 individuals exceeded the limit value (400 µg/kg/day) for human consumption suggested by the Committee on Food and Nutrition. All samples of the species Brycon moorei, Roeboides dayi, Sorubim cuspicaudus, Plagioscion surinamensis and Pseudoplatystoma magdaleniatum exceeded this value. The findings of this study suggest that exposure to high concentrations of Se over time could become a public health and environmental problem.

keywords: Concentrations, Fish, Selenium, Colombia

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How to Cite

Padilla Ramírez, C. ., Córdoba Tovar, L., & Marrugo-Negrete, J. L. (2024). Evaluation of selenium levels in fish of high commercial value in different aquatic environments in northern Colombia. Revista De Investigación Agraria Y Ambiental, 16(1), 299-318. https://doi.org/10.22490/21456453.7659

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