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Table 3 Hair mercury levels in Brazilian River Basins, General Population

From: Hair mercury levels in Amazonian populations: spatial distribution and trends

Study
River Basin
Location N Hg mean μg/g
(median) [SD]
Range μ
g/g
> 10 μg/ga Fish
consumption
Akagi
et al. 1995
Três Bocas 11 28.1 8.4-54.0   
   Araguari River       
Castro et al. 1991 Surucucus,
Paapiu and
Mujacai areas
162 3.61 1.4-8.1   
   Branco River       
Forsberg et al. 1995 Various sites
between Marie
and Paduari Rivers
154 75.5 [35.2] 5.8-171.2   
   Negro River       
Kehrig et al. 1998 Balbina Reservoir 53 6.5 [5.4] 1.2-22.0   110 g
   Negro River       
Leino & Lodenius 1995 Tucuruí area 125 35.0 (29.0) 0.9-240.0   11 meals/week
   Tocantins River       
Pinheiro, Nakanishi
et al. 2000
Belém 13 2.0    
   Tocantins River       
Santos, Camara
et al. 2002
Caxiuanã 214 8.6 [6.3] 0.6-46.0   12.3 meals/week
   Amazon River       
Santos
et al. 2003
Lower Mamoré:
Pakaás Novos Indigenous
Areas
910 8.4 (6.9) [6.4] 0.5-83.9   
   Mamoré River       
Soares et al. 2002 Doutor Tanajura 13 (6.1) 1.4-11.7   
   Mamoré River       
Vasconcellos et al. 1994 Indigenous Xingu Park 27 18.5 (18) [5.9] 6.9-34.0   
   Xingu River Billings Dam 28 0.9 (0.7) [0.7] 0.3-3.0   
  Controls 25 1.1 (1.0) [0.6] 0.3-2.5   
Vasconcellos
et al. 2000
Xingu Park
(13 groups)
   1.2-57.3   
   Xingu River    Highest values   21.8 (20.8) [6.1]    
     Lowest values   3.6 (2.6) [2.4]    
  1. The Tapajós and Madeira Rivers basins are not displayed in this table (see Tables 5, 6, 7, 8, 9, 10). aPercentage of the population with hair mercury levels higher than 10 μg/g.
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