Table 2.

The average results of THg and MeHg and the mean percentage of MeHg.

Communities	N*	HgT (µg·g−1)		MeHg (µg·g−1)		% MeHg**
		Mean ± SD	Range	Mean ± SD	Range
Maranhão	139	2.27 ± 1.84	0.13–9.54	2.11 ± 1.82	0.12–9.54	93.17
S.L. do Tapajós	40	11.41 ± 7.16	1.08–28.17	10.30 ± 7.67	0.96–25.74	90.27
Barreiras	37	5.64 ± 5.55	0.43–27.82	5.20 ± 5.06	0.43–23.20	92.20

*Number of samples

**Mean percentage of methylmercury (MeHg/THg × 100).