Methylmercury exposure in a subsistence fishing community in Lake Chapala, Mexico: an ecological approach

Table 4 Total mercury levels on suspended particles filtered from Lake Chapala in March 2007.

Site ID	Filter ID	Volume Filtered (ml)	Particle mass (g)	Total Mercury* (ng/g)
Santiago	DX 1	780	0.0272	480
Santiago	DX 2	460	0.0164	420
Lerma	DX 5	NR^#	0.1174	670
Lerma	DX 6	250	0.0568	600
Alacranes	DY 5	530	0.0138	290
Alacranes	DY 6	225	0.0057	400
Presidio	DY 7	420	0.0101	770
Presidio	DY 8	610	0.0138	690
Petatan	DY 11	695	0.0434	580
Petatan	DY 12	340	0.0272	580

* Each filter was cut into two pieces that were analyzed separately for total mercury content. The value reported is the mean of the two measurements. In all cases except one, the relative deviation from the mean was <10%. For filter DY 7 (Presidio) it was 15%.
# NR = Not Recorded.

ISSN: 1476-069X