PMID- 23627492 OWN - NLM STAT- MEDLINE DCOM- 20140515 LR - 20171116 IS - 1520-5851 (Electronic) IS - 0013-936X (Linking) VI - 47 IP - 11 DP - 2013 Jun 4 TI - Scavenging amphipods: sentinels for penetration of mercury and persistent organic chemicals into food webs of the deep Arctic Ocean. PG - 5553-61 LID - 10.1021/es304398j [doi] AB - Archived specimens of the scavenging amphipod Eurythenes gryllus, collected from 2075 to 4250 m below the surface on five expeditions to the western and central Arctic Ocean between 1983 and 1998, were analyzed for total mercury ( summation operatorHg), methyl mercury (MeHg), polychlorinated biphenyls (PCBs) and other industrial or byproduct organochlorines (chlorobenzenes, pentachloroanisole, octachlorostyrene), organochlorine pesticides (OCPs), and polybrominated diphenyl ethers (PBDEs). Median summation operatorHg concentrations ranged from 70 to 366 ng g(-1) wet weight (ww). MeHg concentrations (3.55 to 23.5 ng g(-1) ww) accounted for 1.7 to 20.1% (median 3.7%) of summation operatorHg. summation operatorHg and MeHg were positively and significantly correlated with ww ( summation operatorHg r(2) = 0.18, p = 0.0004, n = 63; MeHg r(2) = 0.42, p = 0.0004, n = 25), but not significantly with delta(13)C nor delta(15)N. Median concentrations of total persistent organic pollutants (POPs) ranged from 9750 to 156,000 ng g(-1) lipid weight, with order of abundance: summation operatorTOX (chlorobornanes quantified as technical toxaphene) > summation operatorPCBs > summation operatorDDTs > summation operatorchlordanes > summation operatormirex compounds > summation operatorBDEs approximately summation operatorchlorobenzenes approximately octachlorostyrene > alpha-hexachlorocyclohexane approximately hexachlorobenzene approximately pentachloroanisole. Enantioselective accumulation was found for the chiral OCPs o,p'-DDT, cis- and trans-chlordane, nonachlor MC6 and oxychlordane. Lipid-normalized POPs concentrations were elevated in amphipods with lipid percentages