title: Contrasting food web factor and body size relationships with Hg and Se concentrations in marine biota.
abstract: Marine fish and shellfish are primary sources of human exposure to mercury, a potentially toxic metal, and selenium, an essential element that may protect against mercury bioaccumulation and toxicity. Yet we lack a thorough understanding of Hg and Se patterns in common marine taxa, particularly those that are commercially important, and how food web and body size factors differ in their influence on Hg and Se patterns. We compared Hg and Se content among marine fish and invertebrate taxa collected from Long Island, NY, and examined associations between Hg, Se, body length, trophic level (measured by δ(15)N) and degree of pelagic feeding (measured by δ(13)C). Finfish, particularly shark, had high Hg content whereas bivalves generally had high Se content. Both taxonomic differences and variability were larger for Hg than Se, and Hg content explained most of the variation in Hg:Se molar ratios among taxa. Finally, Hg was more strongly associated with length and trophic level across taxa than Se, consistent with a greater degree of Hg bioaccumulation in the body over time, and biomagnification through the food web, respectively. Overall, our findings indicate distinct taxonomic and ecological Hg and Se patterns in commercially important marine biota, and these patterns have nutritional and toxicological implications for seafood-consuming wildlife and humans.
authors.affiliation: School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York, United States of America.
authors.forename: Roxanne
authors.initials: R
authors.lastname: Karimi
authors.forename: Michael
authors.initials: M
authors.lastname: Frisk
authors.forename: Nicholas S
authors.initials: NS
authors.lastname: Fisher
mesh_terms: D000818:Animals; D049628:Body Size; D020387:Food Chain; D008386:Marine Biology; D008628:Mercury / Q000032:analysis / Q000633:toxicity*; D012643:Selenium / Q000032:analysis / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*
chemical_list: D014874:Water Pollutants, Chemical; D008628:Mercury; D012643:Selenium
references.citation: Ecohealth. 2008 Dec;5(4):442-55
references.pmid: 19365692
references.citation: Environ Res. 2001 Oct;87(2):108-18
references.pmid: 11683594
references.citation: J Toxicol Environ Health A. 2009;72(14):853-60
references.pmid: 19557613
references.citation: Environ Pollut. 2011 Jan;159(1):10-17
references.pmid: 20965629
references.citation: Environ Toxicol Chem. 2010 Aug;29(8):1755-61
references.pmid: 20821629
references.citation: Environ Health Perspect. 2012 Nov;120(11):1512-9
references.pmid: 22732656
references.citation: Ecol Lett. 2006 Dec;9(12):1273-83
references.pmid: 17118001
references.citation: Arch Environ Contam Toxicol. 2006 Oct;51(3):416-24
references.pmid: 16823518
references.citation: Sci Total Environ. 2013 Jan 15;443:278-86
references.pmid: 23202378
references.citation: Environ Res. 2012 Apr;114:12-23
references.pmid: 22405995
references.citation: Environ Pollut. 2010 Aug;158(8):2716-24
references.pmid: 20537451
references.citation: Ecohealth. 2012 Jun;9(2):171-82
references.pmid: 22456727
references.citation: Sci Total Environ. 2004 Jun 29;326(1-3):1-31
references.pmid: 15142762
references.citation: Am Nat. 2010 Dec;176(6):699-709
references.pmid: 20973668
references.citation: Science. 1978 Jun 30;200(4349):1489-91
references.pmid: 663631
references.citation: Integr Environ Assess Manag. 2010 Oct;6(4):685-710
references.pmid: 20872649
references.citation: Environ Sci Technol. 2009 Mar 15;43(6):1804-10
references.pmid: 19368175
references.citation: Sci Total Environ. 1998 Aug 28;219(2-3):183-208
references.pmid: 9802248
references.citation: Environ Toxicol Chem. 2009 Aug;28(8):1567-77
references.pmid: 19374471
references.citation: Biol Trace Elem Res. 2007 Dec;119(3):242-54
references.pmid: 17916947
references.citation: Ecotoxicology. 2010 Nov;19(8):1601-11
references.pmid: 20848188
references.citation: Sci Total Environ. 2012 Aug 1;431:46-56
references.pmid: 22664537
references.citation: J Reprod Fertil. 1971 May;25(2):157-70
references.pmid: 5558377
references.citation: Neurotoxicology. 2008 Sep;29(5):802-11
references.pmid: 18761370
references.citation: Aquat Toxicol. 2004 May 28;68(1):39-50
references.pmid: 15110468
references.citation: Biol Trace Elem Res. 2005 Jan;103(1):17-35
references.pmid: 15695845
references.citation: Environ Toxicol Chem. 2006 Aug;25(8):2132-42
references.pmid: 16916033
references.citation: Environ Sci Pollut Res Int. 2009 Jan;16(1):10-24
references.pmid: 18751748
references.citation: Environ Sci Technol. 2011 Apr 1;45(7):3116-22
references.pmid: 21366307
references.citation: Environ Sci Technol. 2004 Sep 1;38(17):4519-26
references.pmid: 15461158
references.citation: Nature. 2000 Sep 7;407(6800):78-80
references.pmid: 10993076
references.citation: Oecologia. 2007 May;152(1):179-89
references.pmid: 17225157
references.citation: Environ Res. 2012 Jan;112:8-19
references.pmid: 22226733
references.citation: Environ Toxicol Chem. 2013 Apr;32(5):1143-52
references.pmid: 23400925
references.citation: Sci Total Environ. 2011 Mar 15;409(8):1418-29
references.pmid: 21292311