Mercury concentrations in Baja California Sur fish: Dietary exposure assessment. Academic Article uri icon


  • Total mercury concentrations ([THg]) in muscle were determined in commercial finfish and elasmobranchs from Baja California Sur (BCS), Mexico to evaluate dietary Hg exposure for BCS communities, including the relationship of trophic ecology, length and mass with [THg] that might drive future consumption advice (e.g., recommend limited consumption of large fish for some species). The [THg] ranged from 0.06 to 528.02gkg-1 ww in finfish and 17.68-848.26gkg-1 ww in elasmobranchs. Relative to the consumption threshold set for predatory fish in Mexico, all species had a concentration below 1000gkg-1 ww. As expected, 16 (4.02%) and 75 (18.84%) individual fish were above advisory thresholds of 500 and 200gkg-1 ww, respectively. The hazard quotients (HQs) in most species were significantly <1.0, only banded guitarfish showed a significant median HQ>1.0. Thus, the relative level of risk of high Hg exposure is low for most species.

published proceedings

  • Chemosphere

author list (cited authors)

  • Murillo-Cisneros, D. A., Zenteno-Savn, T., Harley, J., Cyr, A., Hernndez-Almaraz, P., Gaxiola-Robles, R., Galvn-Magaa, F., & O'Hara, T. M.

citation count

  • 3

complete list of authors

  • Murillo-Cisneros, Daniela A||Zenteno-Savín, Tania||Harley, John||Cyr, Andrew||Hernández-Almaraz, Pablo||Gaxiola-Robles, Ramón||Galván-Magaña, Felipe||O'Hara, Todd M

publication date

  • January 2021