Resumen del producto

A study was carried out on the concentration of mercury and selenium in the Mustelus henlei mesodepredator in the coastal area of the Barrancas (BCS). This species constitutes one of the most important sharks in the coastal fishery of the western coast of Baja California Sur, representing an important source of food for humans. Due to the risk that it may constitute for human health, it is important to determine the concentrations of Hg and Se (wet weight, w.w.) in the muscle and liver, the risk to consumers; as well as evaluate the relationship between these two elements. The average concentrations of Hg in the muscle of M. henlei was 0.017 µg / g (0-0.07, min-max), lower value than established by the Official Mexican Standard. On the other hand, the liver presented average concentrations of 0.0039 µg / g (0-0.016 minmax). The highest Hg values in muscle are due to this organ is a biological target for the accumulation of Hg, because of its high affinity towards the thiol groups of proteins. The Se were presented in all organisms analyzed with detectable values. The averages values in muscle were 0.036 µg / g (0.031-0.42 min-max), while the liver had average concentrations of 0.2 µg / g (0.17-0.26 min-max). Due to the protective effect of Se against the toxicity of Hg, the Se: Hg molar ratio was determined, this ratio in muscle was 2.12, while in liver it was 51.28. Although, it is known that methylmercury detoxification involves a chemical mechanism that comprises Se, the low concentrations of Hg in M. henlei, could be due to the presence of this element in the area is scarce and shark migrations are relatively short. This study shows that M. henlei does not constitute a risk to human health, for these two elements.

Palabras clave: Trace elements; Human health; toxicity

Para obtener una copia del documento contacta la personal de la biblioteca a través del correo bibliocicimar{a}ipn.mx