Metal concentration in tilapia (Oreochromis niloticus) and largemouth bass (Micropterus salmoides) and the associated consumption risk for populations around two dams in northwestern Mexico.

The accumulation of metal(loid)s in aquatic ecosystems poses a potential risk to human health. Although fish constitute a valuable nutritional source, their consumption may also carry health risks. We evaluated the impact of the 2014 mining spill in the Sonora River on the levels of metal(loid)s in two species of fish (tilapia Oreochromis niloticus, and largemouth bass Micropterus salmoides), and the risks associated with their consumption. The cadmium (Cd), copper (Cu), iron (Fe), manganese (Mn), and lead (Pb) contents were determined using an Atomic Absorption Spectrophotometer (AAS) with air-acetylene flame and graphite furnace methods. The Cd (0.12-0.17 μg g-1) and Mn (4.95-17.77 μg g-1) levels in the muscle of fish collected were higher than the limits established by international legislation. However, the hazard quotient (HQ) and hazard index (HI) values were < 1 (ranges HQ=0.004-0.26, and HI=0.11-0.34), indicating that there were no health risks associated with metal exposure. When a hypothetical daily consumption of fish fillet was considered, the HQ and HI values were > 1 (ranges HQ=1.02-11.3, and HI=4.13-13.5). Although there were no determined health risks for general consumption, some groups of people, like fishery dependents, who have high fish consumption rates, may be at risk of adverse health effects.  .

• Publication year

  2025

• Venue

  International Journal of Environmental Health Research

• Publication date

  2025-07-29

• Fields of study

  Medicine, Environmental Science

• Identifiers
  DOI 10.1080/09603123.2025.2538507PMID 40727955
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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