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This study analyzed total mercury (THg), and selenium (Se) in edible tissues of white shrimp (Litopenaeus vannamei), blue shrimp (L. stylirostris) and brown shrimp (F. californiensis), from three states of the Northwest of Mexico in September and October 2017. Concentrations of THg and Se in the muscle were between 0.026 and 0.829 and 0.126–1.741 µg/g dry weight (dw), respectively. Significant differences were observed among Hg concentration of Sonora and Nayarit and among Se concentration of Sinaloa and Nayarit. In addition, the health risk assessment (HQ) in the three species of shrimp was between 0.550 and 0.607. All Se:Hg molar ratios were > 1 and positive HBVSe values that showed that shrimp from Northwest of Mexico does not represent a risk to human health. [ABSTRACT FROM AUTHOR]

The article discusses the indigenous peoples of Mexico, particularly focusing on their health, how the mining industry in Mexico has impacted Mexican indigenous peoples, and the perilous state of human rights for indigenous Mexicans as of 2018. It also mentions the candidacy of Mexican presidential candidate María de Jesús Patrico Martínez.

The article discusses the presence and condition of indigenous peoples in Mexico. Topics mentioned include the total population of the people in the country, the indigenous languages and dialects spoken within the territory and the recognition of the country as a pluricultural one. The unanimous vote of the country that favors the United Nations Declaration on the Rights of Indigenous Peoples in 2007 is also highlighted.