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Table 10 Hair mercury levels in the Madeira River Basin

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

Studied population Location N Hg mean μg/g
(median) [SD]
Range μg/g > 10 μg/ga Fish
consumption
General population       
   Bastos et al. 2006 Various populations along the Madeira River 713 15.2 (12.5) [9.6] 0.36-150.0 >50% 7 meals/week
   Boischio & Barbosa 1993 Near Porto Velho 311 ≈ (10) ?-303.1 51% 200 g/dayb
Mothers and their infants       
   Barbosa & Dorea 1998 Near Porto Velho      
     Mothers 98 14.1 (12.8) [10.7] 2.6-94.7 >50%  
     Infants 71 10.8 (7.8) [8.5] 0.8-44.4   
   Boschio & Cernichiari 1998 Near Porto Velho      
     Mothers 12   4.0-41.0   
     Infants 12   8.2-50.4   
Boischio & Henshel 2000 Near Porto Velho      
     Mothers 90 12.6 [6.5] 15.0-45.0   
     Infants 89 10.2 [7.2] 1.0-34.2   
Marques et al. 2007 Porto Velho city      
     Mothers 82 (5.4) 0.4-62.4   1 meal/week
     Infants 82 (1.8) 0.02-32.9   
  1. aPercentage of the population with hair mercury levels higher than 10 μg/g. bFrom the Letter to the Editor Boischio Environ Research 2000; 82:91-92
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