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¹ Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas

Mining activities are a current environmental issue due to heavy metal release and subsequent metal uptake by organisms. Inthis study, we quantified the concentrations of essential (Cu, Zn) and toxic (Cd, Pb) elements in the muscle of 248 leopardgroupers, Mycteroperca rosacea, captured by spearfishing and free diving close to a mining district in the Gulf of Californiaduring 2014–2015. We analysed metals using high-resolution inductively coupled plasma source mass spectrometry (HRICP–MS). We analysed metal concentrations by fish size, sex, maturity, season, year and risk factor for human consumption.The results indicated common levels of essential elements (Cu: 11 ± 34.3 µg/g, Zn: 377 ± 1390 µg/g) in comparison withtoxic elements (Cd: 0.06 ± 0.1 µg/g, Pb: 0.98 ± 1.5 µg/g). Cadmium was within the permissible limit of Mexican standards(0.5 µg/g), but lead content bordered its limit (1.0 µg/g). Heavy metal concentrations were comparable between males andfemales. Metal variations were not significantly correlated with sex, maturity, season or year (p > 0.05). The evaluation ofbenefits (daily mineral intake) and risks (target hazard quotients) to health indicated that these fish did not represent a riskof adverse effects to consumers within worldwide limits, while the nutritional benefits were high.

Palabras clave: heavy metals; bioaccumulation; Epinephelidae; Groupers; Mining hotspot

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