Fish consumption frequency and lipid peroxidation in the riverside population of Lower Tocantins, Pará
2019
Introduction: Several studies report the benefits of fish
consumption to the prevention of cardiovascular diseases
such as atherosclerosis, thrombosis and arrhythmia. On the
other hand, regular consumption of fish can induce the accumulation
of methylmercury in the body.
Objective: To evaluate the relationship between frequency
of fish consumption, mercury concentrations and intensity of
lipid peroxidation.
Methods: A cross - sectional, observational study. It was
evaluated riverside in Limoeiro do Ajuru, Para. Variables were
sociodemographic variables, frequency of weekly fish consumption,
concentration of total mercury in hair and the dose
of malondialdehyde in plasma. The concentrations of total
mercury (μg/g) and malondialdehyde (nmol / ml) were respectively
0.63 μg/g and 0.54 nmol/ml for weekly fish consumption
less than two meals, 0.51 μg/g 0.42 nmol/ml for
consumption in two to four meals and 0.88 μg/g and 0.31
nmol/ml for consumption major than four fish meals. There
was a significant difference between groups of two to four
and major than four meals, only for the total mercury variable
(p = 0.008).
Discussion: In this study, low levels exposure and high
fish consumption can influencing the bioaccumulation of mercury
in this population. Santos et al, found the total mercury
concentration (0.09 to 3.79 μg/g) in the rivers and compared
the levels according to the intake categories of fish, did not
obtain significant statistical difference. This divergent result
suggests that deforestation in the Amazon has been increased
and is an important vehicle for mercury exposure
which affects local survival and subsistence.
Conclusion: Riparians in the studied region have high fish
consumption and low concentrations of mercury. Although the
group with low fish consumption had higher levels of MDA
there was no significant difference when compared with other
groups.
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