Fish consumption and mercury exposure among Louisiana recreational anglers.
BACKGROUND
Methylmercury (MeHg) exposure assessments among average fish consumers in the United States may underestimate exposures among U.S. subpopulations with high intakes of regionally specific fish.


OBJECTIVE
We examined relationships among fish consumption, estimated mercury (Hg) intake, and measured Hg exposure within one such potentially highly exposed group, recreational anglers in the state of Louisiana, USA.


METHODS
We surveyed 534 anglers in 2006 using interviews at boat launches and fishing tournaments combined with an Internet-based survey method. Hair samples from 402 of these anglers were collected and analyzed for total Hg. Questionnaires provided information on species-specific fish consumption during the 3 months before the survey.


RESULTS
Anglers' median hair Hg concentration was 0.81 µg/g (n = 398; range, 0.02-10.7 µg/g); 40% of participants had levels >1 µg/g, which approximately corresponds to the U.S. Environmental Protection Agency's reference dose. Fish consumption and Hg intake were significantly positively associated with hair Hg. Participants reported consuming nearly 80 different fish types, many of which are specific to the region. Unlike the general U.S. population, which acquires most of its Hg from commercial seafood sources, approximately 64% of participants' fish meals and 74% of their estimated Hg intake came from recreationally caught seafood.


CONCLUSIONS
Study participants had relatively elevated hair Hg concentrations and reported consumption of a wide variety of fish, particularly locally caught fish. This group represents a highly exposed subpopulation with an exposure profile that differs from fish consumers in other regions of the United States, suggesting a need for more regionally specific exposure estimates and public health advisories.
Lincoln
Rebecca A
RA
Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA.
Shine
James P
JP
Chesney
Edward J
EJ
Vorhees
Donna J
DJ
Grandjean
Philippe
P
Senn
David B
DB
D000818:Animals; D003625:Data Collection; D005399:Fishes; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D008145:Louisiana; D008628:Mercury / Q000032:analysis*; D008767:Methylmercury Compounds / Q000032:analysis*; D011795:Surveys and Questionnaires
D008767:Methylmercury Compounds; D008628:Mercury