Selenium and mercury concentrations, Se:Hg molar ratios and their effect on the antioxidant system in wild mammals

杂食动物 臼齿 Mercury(编程语言) 化学 动物科学 食草动物 抗氧化剂 生物 内分泌学 生物化学 生态学 古生物学 有机化学 计算机科学 程序设计语言 捕食
作者
Agnieszka Tomza‐Marciniak,Bogumiła Pilarczyk,Radosław Drozd,Renata Pilarczyk,Marta Juszczak–Czasnojć,Viktoriia Havryliak,Joanna Podlasińska,J. Udała
出处
期刊:Environmental Pollution [Elsevier BV]
卷期号:322: 121234-121234 被引量:9
标识
DOI:10.1016/j.envpol.2023.121234
摘要

The aim of this study was to a) evaluate the concentration of Se and Hg and their relationship in the tissues of 4 species of wild mammals, including Se:Hg molar ratios, and b) evaluate the effect of the analysed elements and their mutual proportions expressed as Se:Hg molar ratio, on the antioxidant system in the tissues of the tested animals. The study was performed on 31 animals belonging to four species: wild boar, red fox, roe deer, brown hare. Determination of Hg in liver, kidney and muscle of animals was performed using an AMA 254 mercury analyser. Total Se concentrations were determined using the spectrofluorometric method. In omnivores demonstrated higher Se concentrations in all analysed organs compared to the herbivores. The highest concentration of Hg was found in the kidneys of the tested animals, and the lowest in the muscles. High and moderate correlation between Se and Hg was observed in the liver of omnivorous, while in herbivores this correlation was weak. In all analysed samples, the Se:Hg molar ratios were above 1 (min: liver 5.9, max: kidney 110). Generally, the highest Se:Hg ratio values were found in kidney and the lowest in liver of tested animals. No significant correlation was found between GPx, GST and SOD activity and Se or Hg concentration in analysed organs. But it was observed that Se:Hg molar was negatively correlated with CAT activity in the most samples. The obtained results may suggest that omnivorous animals demonstrate greater Hg sequestration in the liver than herbivores, which has been proposed as one of the mechanisms of Se antagonistic action towards Hg. The ratio between Se and Hg, rather than the concentration of these elements in organs, affected the antioxidant status in the animal organism, specifically the CAT activity.
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