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Variation in Hg accumulation between demersal and pelagic fish from Puruzinho Lake, Brazilian Amazon.
Ecotoxicology ( IF 2.535 ) Pub Date : 2019-10-18 , DOI: 10.1007/s10646-019-02118-x
Lucas Silva Azevedo,Inácio Abreu Pestana,Adriely Ferreira da Costa Nery,Wanderley Rodrigues Bastos,Cristina Maria Magalhães Souza

Aquatic ecosystems in the Amazon are exposed to mercury, mostly from natural sources. Hg accumulation in fish tissues poses a risk to the local population since fish is one of the main sources of protein in the region. The aim of this study was to evaluate Hg distribution in demersal and pelagic carnivorous fish between seasons in Puruzinho Lake in the Brazilian Amazon. Total Hg was quantified in 221 individuals of 8 species obtained during the high water and low water seasons. Two-way ANOVA indicated an interaction between foraging habitat and season. During high water, total Hg concentrations were similar between demersal and pelagic fish, while in low water, total Hg levels were higher in demersal fish. Pelagic and demersal fishes' Hg levels were similar between the two seasons.
更新日期:2020-01-04

 

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