Methylmercury Concentrations in Fish from Tidal Waters of The Chesapeake Bay

  • Robert P. Mason
  • Deborah Heyes
  • Auja Sveinsdottir


Striped bass (Morone saxatilis), white perch (Morone Americana), and largemouth bass (Micropterus salmoides) were collected in the Chesapeake Bay mainstem and tributaries and analyzed for total mercury (Hg) and methylmercury (MeHg) content. Striped bass are anadromous, whereas white perch and largemouth bass are resident species, and the largemouth bass are also restricted to the tidal fresh portion of the Bay. Total Hg and MeHg concentrations in striped bass increased with fish size, and large fish (>7.5 kg wet weight) tended to have MeHg concentrations of 300 ng g−1 or greater. On average, the striped bass MeHg concentration was 120 ± 100 ng g−1 and the fraction of the total Hg as MeHg was 65 ± 22%. Reasons for the lower relative MeHg content are discussed. Otolith strontium/calcium ratios were also determined to examine whether migration had a significant impact on MeHg content in striped bass. Resident fish did appear to have a higher MeHg burden than the more migratory fish of similar size. Largemouth bass and white perch tended to have low MeHg content (respectively, 14 ± 7 and 13 ± 11 ng g−1; all fish <1 kg wet weight), and the white perch also had a low %MeHg (28 ± 14%), reflecting their mostly planktivorous lifestyle. A comparison of largemouth bass and striped bass MeHg concentrations for the estuarine fish with those of fish in Maryland reservoirs of similar size showed that the estuarine fish have much lower MeHg burdens. Differences in MeHg concentration in the estuarine waters compared to the reservoir waters likely account for much of this difference, although the importance of other factors is also discussed.


  1. Baeyens W, Leermarkers M (1996) Particulate, dissolved and methylmercury budgets for the Scheldt estuary (Belgium and the Netherlands). In: Baeyens W, et al. (eds) Global and regional mercury cycles: sources, fluxes, and mass balances. Kluwer Academic Publishers, Dordrecht, The Netherlands. pp 285Google Scholar
  2. Baeyens W, Leermakers M, Papina T, Saprykin A, Brion N, Noyen J, De Gieter M, Elskens M, Goeyens L (2003) Bioconcentration and biomagnification of mercury and methylmercury in North Sea and Scheldt estuary fish. Arch Environ Contam Toxicol 45:498–508CrossRefGoogle Scholar
  3. Benoit JM, Gilmour CC, Heyes A, Mason RP, Miller CL (2003) Geochemical and biological controls over methylmercury production and degradation in aquatic ecosystems. In: Biogeochemistry of environmentally important trace elements. American Chemical Society Publ, ACS symposium series 835, pp 262–297Google Scholar
  4. Benoit JM, Gilmour CC, Mason RP, Heyes A (1999) Sulfide controls on mercury speciation and bioavailability in sediment pore waters. Environ Sci Technol 33:951–957CrossRefGoogle Scholar
  5. Benoit JM, Gilmour CC, Mason RP, Riedel GS, Riedel GF (1998) Behavior of mercury in the Patuxent estuary. Biogeochem 40:249–265CrossRefGoogle Scholar
  6. Benoit JM, Mason RP, Gilmour CC (2001) Aspects of the bioavailability of mercury for methylation in pure cultures of Desulfobulbous proprionicus (1PR3). Appl Environ Microbiol 67:51–58CrossRefGoogle Scholar
  7. Blankenship K (2004) Menhaden stock perplexes fish managers. bay J 14(6).
  8. Bloom NS (1989) Determination of picogram levels of methylmercury by aqueous phase ethylation, followed by cryogenic gas chromatography with cold vapor atomic fluorescence detection. Can J Fish Aqua Sci 46:1131–1140CrossRefGoogle Scholar
  9. Bloom NS (1992) On the chemical form of mercury in edible fish and marine invertebrate tissue. Can J Fish Aqua Sci 49:1010–1017Google Scholar
  10. Bloom NS, Fitzgerald WF (1988) Determination of volatile species at the picogram level by low temperature gas chromatography with cold vapor atomic fluorescence detection. Analytical Chim Acta 208:151–161CrossRefGoogle Scholar
  11. Cunningham P, Cooter W, Sullivan E (2003) Mercury in marine life database. Prepared by RTI International for USEPA, April 2003Google Scholar
  12. Driscoll CT, Blette V, Yan C, Schofield CL, Munson R, Holsapple J (1995) The role of dissolved organic carbon in the chemistry and bio availability of mercury in remote Adirondack lakes. Water Air Soil Poll 80:499–508CrossRefGoogle Scholar
  13. Fitzgerald WF, Clarkson T (1991) Mercury and monomethylmercury—present and future concerns. Environ Health Perspect 96:159–166Google Scholar
  14. Gilmour CC (1999) A preliminary survey of size-specific mercury concentrations in game fish from Maryland fresh and estuarine waters. Chesapeake bay and watershed programs: monitoring and non-tidal assessment CBWP-MANTA-AD-98-9Google Scholar
  15. Gilmour CC, Henry EA, Mitchell R (1992) Sulfate stimulation of mercury methylation in freshwater sediments. Environ Sci Technol 26:2281–2287CrossRefGoogle Scholar
  16. Gilmour CC, Riedel GS (2000) A survey of size-specific mercury concentrations in game fish from Maryland fresh and estuarine waters. Arch Environ Contam Toxicol 39:53–59CrossRefGoogle Scholar
  17. Greenfield BK, Davis JA, Fairey R, Roberts C, Crane DB, Ichikawa G, Petreas M (2003) Contaminant concentrations in fish from San Francisco Bay, 2000. SFEI Contribution # 77, San Francisco Estuary Institute, July 2003Google Scholar
  18. Griffin JC, Margraf FJ (2003) The diet of Chesapeake bay striped bass in the late 1950s. Fish Manage Ecol 10:323–328CrossRefGoogle Scholar
  19. Heyes A, Mason RP, Kim E-H, Sunderland E (2005) Mercury methylation in estuaries. Mar Chem (in press)Google Scholar
  20. Heyes A, Miller C, Mason RP (2004) Mercury and methylmercury in Hudson River Sediment: Impact of resuspension on portioning and methylation. Mar Chem 90:75–89CrossRefGoogle Scholar
  21. Hildebrand SF, Schroeder WC (1928) Fishes of Chesapeake Bay. Bulletin of the Bureau of Fisheries, pp 242–251Google Scholar
  22. Holsbeek L, Das HK, Joiris CR (1997) Mercury speciation and accumulation in Bangladesh freshwater and anadromous fish. Sci Tot Environ 198:201–210CrossRefGoogle Scholar
  23. Hudson RJM, Gherini SA, Watras CJ, Porcella DP (1994) Modeling the biogeochemical cycle of mercury in lakes: The mercury cycling model (MCM) and its application to the MTL study lakes. In: Watras CJ, Huckabee JW (eds), Mercury pollution: integration and synthesis. Lewis Publishers, Boca Raton, Florida, pp 473–526Google Scholar
  24. Hudson River Foundation (HRF) (2004) Health of the harbor: The first comprehensive look at the state of the NY/NJ harbor estuary. Google Scholar
  25. Kannan K, Smith RG, Lee RF, Windom HL, Heitmuller PT, Macauley JM, Summers JK (1998) Distribution of total mercury and methyl mercury in water, sediment, and fish from south Florida estuaries. Arch Environ Contam Toxicol 34:109–118CrossRefGoogle Scholar
  26. Kim EY, Saeki K, Tanabe S, et al. (1996) Specific accumulation of mercury and selenium in seabirds. Environ Poll 94:261–265CrossRefGoogle Scholar
  27. Kraus RT, Secor DH (2004) Incorporation of strontium into otoliths of an estuarine fish. J Exper Mar Biol Ecol 302:85–106CrossRefGoogle Scholar
  28. Lawrence AL, Mason RP (2001) Factors controlling the bioaccumulation of mercury and methylmercury by the estuarine amphipod Leptocheirus plumulosus. Environ Poll 111:217–231CrossRefGoogle Scholar
  29. Lawrence AL, McAloon KM, Mason RP, Mayer LM (1999) Intestinal solubilization of particle-associated organic and inorganic mercury as a measure of bioavailability to benthic invertebrates. Environ Sci Technol 33:1871–1876CrossRefGoogle Scholar
  30. Mansueti RJ (1961) Age, growth, and movements of the striped bass, Roccus saxatilis, taken in size selective fishing gear in Maryland. Ches Sci 2:9–36CrossRefGoogle Scholar
  31. Mason RP (2002) The bioaccumulation of mercury, methylmercury and other toxic elements into pelagic and benthic organisms. In: Newman MC, Robert MH, Hale RC (eds) Coastal and estuarine risk assessment. CRC/Lewis Publishers, pp 127–149Google Scholar
  32. Mason RP, Benoit JM (2003) Organomercury compounds in the environment. In: Craig P (ed), Organometallics in the environment. John Wiley & Sons, New York, pp 57–99CrossRefGoogle Scholar
  33. Mason RP, Fitzgerald WF (1996) Sources, sinks and biogeochemical cycling of mercury in the ocean. In: Baeyens W, Ebinghaus R, Vasiliev O (eds), Global and regional cycles of mercury: sources, fluxes and mass balances. Kluwer Academic Publishers, Dordrecht, the Netherlands, pp 85–108Google Scholar
  34. Mason RP, Fitzgerald WF, Morel FM (1994) The biogeochemical cycling of elemental mercury: anthropogenic influences. Geochim Cosmochim Acta 58:3191–3198CrossRefGoogle Scholar
  35. Mason RP, Lawrence AL (1999) Concentration, distribution, and bioavailability of mercury and methylmercury in sediments of Baltimore Harbor and Chesapeake Bay, Maryland, USA. Environ Toxic Chem 18:2438–2447CrossRefGoogle Scholar
  36. Mason RP, Lawson NM, Lawrence AL, Lee JG, Leaner JJ, Sheu G-R (1999) Mercury in the Chesapeake Bay. Mar Chem 65:77–96CrossRefGoogle Scholar
  37. Mason RP, Lawson NM, Sheu G-R (2000) Annual and seasonal trends in mercury deposition in Maryland. Atmos Environ 34:1691–1701CrossRefGoogle Scholar
  38. Mason RP, Lawson NM, Sullivan KA (1997) Atmospheric deposition to the Chesapeake bay watershed: regional and local sources. Atmos Environ 31:3531–3540CrossRefGoogle Scholar
  39. Mason RP, Reinfelder JR, Morel FM (1996) Uptake, toxicity and trophic transfer of mercury in a coastal diatom. Environ Sci Technol 30:1835–1845CrossRefGoogle Scholar
  40. Mason RP, Sheu G-R (2002) The role of the ocean in the global mercury cycle. Global Biogeochemical Cycles, 16(4), 1093, doi:10.1029/2001GBC001440Google Scholar
  41. Mason RP, Sveinsdottir AY (2003) Mercury and methylmercury concentrations in water and largemouth bass in Maryland reservoirs. Final report submitted to Maryland Department of Natural Resources, CBWP-MAN7A-AD-03-1. Also a paper on this topic is currently in review for Arch Environ Contam ToxicolGoogle Scholar
  42. MDE (2004) Maryland Department of the Environment Mercury Website.
  43. Morel FMM, Kraepiel AML, Amyot M (1998) The chemical cycle and bioaccumulation of mercury. Ann Review Ecol Systematics 29:543–566CrossRefGoogle Scholar
  44. Murdy EO, Birdsong RS, Musick JA (1997) Fishes of the Chesapeake Bay. Smithsonian Institution Press, Washington and London, pp 216–244Google Scholar
  45. National Oceanographic and Atmospheric Administration (NOAA) (2003) Commercial and recreational fish of the Chesapeake Bay.
  46. Riget F, Asmund G, Aastrup P (2000) Mercury in Arctic char (Salvelinus alpinus) populations from Greenland. Science Total Environ 245:161–172CrossRefGoogle Scholar
  47. Rochelle-Newall EJ, Fisher TR (2002) Chromophoric dissolved organic matter and dissolved organic carbon in Chesapeake Bay. Mar Chem 77:23–41CrossRefGoogle Scholar
  48. Rodgers DW (1994) You are what you eat and a little bit more: bioenergetics-based models of methylmercury accumulation in fish revisited. In: Watras CJ, Huckabel JW (eds) Mercury pollution: integration and synthesis. Lewis Publishers, New York, pp 427–439Google Scholar
  49. Rolfhus KR, Fitzgerald WF (1995) Linkages between atmospheric mercury deposition and the methylmercury content of marine fish. Water Air Soil Poll 80:291–297CrossRefGoogle Scholar
  50. Rudd JWM (1995) Sources of methylmercury to freshwater ecosystems: A review. Water Air Soil Poll 80:697–713CrossRefGoogle Scholar
  51. Secor DH, Rooker JR, Zlokovitz E, Zdanowicz VS (2001) Identification of riverine, estuarine, and coastal contingents of Hudson River striped bass based upon otolith elemental fingerprints. Mar Ecol Prog Ser 211:245–253Google Scholar
  52. Sheu G-R, Mason RP, Lawson NM (2002) Speciation and distribution of atmospheric mercury over the Northern Chesapeake Bay. In: Lipnick RL, Mason RP, Phillips ML, Pittman CU Jr (eds) Chemicals in the environment: fate, impacts, and remediation. American Chemical Society Publishers, ACS symposium series no. 806, pp 223–242Google Scholar
  53. Sveinsdottir AY (2002) Methylmercury in largemouth bass (Micropterus salmoides) and forage fish from Maryland reservoirs and factors influencing uptake. Masters Thesis. University of Maryland, Chesapeake Biological LaboratoryGoogle Scholar
  54. Sveinsdottir AY, Mason RP (2005) Factors controlling mercury and methylmercury concentrations in largemouth bass (Micropterus salmoides) and other fish from Maryland reservoirs. Arch Environ Contam Toxicol 49:528–545CrossRefGoogle Scholar
  55. US Environmental Protection Agency (USEPA) (1995) National listing of fish consumption advisories. USEPA, EPA-823-F-95-004, Office of Water, Washington, DCGoogle Scholar
  56. USEPA (2004) Fish consumption advice webpage. http://www.epa. gov/waterscience/fishadvice/advice.html
  57. US Federal Drug Administration (USFDA) (2002) Consumer advisory: an important message for pregnant women and women of childbearing age who may become pregnant about the risks of mercury in fish.∼dms/admehg.html Google Scholar
  58. U.S. Geological Service (USGS) Website (2004)
  59. Wagemann R, Trebacz E, Boila G, et al. (1998) Methylmercury and total mercury in tissues of arctic marine mammals. Sci Tot Environ 218:19–31CrossRefGoogle Scholar
  60. Walter JF, Austin HM (2003) Diet composition of large striped bass (Morone saxatilis) in Chesapeake Bay. Fish Bull 101:414–423Google Scholar
  61. Watras CJ, Bloom NS (1992) Mercury and methylmercury in individual zooplankton. Liminol Oceanog 37:1313–1318CrossRefGoogle Scholar
  62. Watras CJ, Bloom NS, Hudson RJM, Gherini S, Munson R, Claas SA, Morrison KA, Hurley J, Wiener JG, Fitzgerald WF, Mason RP, Vandal G, Powell D, Rada R, Rislov L, Winfrey M, Elder J, Krabbenhoft D, Andren AW, Babiarz C, Porcella DB, Huckabee JW (1994) Sources and fates of mercury and methylmercury in Wisconsin lakes. In: Watras CJ, Huckabee JW (eds) Mercury pollution: integration and synthesis. Lewis Publishers, Boca Raton, Florida, pp 153–177Google Scholar
  63. Weiss J, Trip L, Mahaffey KR (1999) Methylmercury: a new look at the risks. Public Health Reports 114:397–401CrossRefGoogle Scholar
  64. Wiener JG, Krabbenhoft DP, Heinz GH, Scheuhammer AM (2002) Ecotoxicology of mercury. In: Hoffman DJ, Rattner BA, Burton GA Jr, Cairns J Jr (eds), Handbook of ecotoxicology, 2nd ed. CRC Press, Boca Raton, Florida, pp 409Google Scholar
  65. Wolfe MF, Schwarzbach S, Sulaiman RA (1998) The effects of mercury on wildlife: a comprehensive review. Environ Toxicol Chem 17:146CrossRefGoogle Scholar
  66. World Health Organization (1990) Environmental health criteria 101: Mercury I. Geneva, pp 144Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Robert P. Mason
    • 1
    • 2
  • Deborah Heyes
    • 1
  • Auja Sveinsdottir
    • 1
  1. 1.Chesapeake Biological LaboratoryUniversity of Maryland Center for Environmental ScienceSolomonsUSA
  2. 2.Department of Marine SciencesUniversity of ConnecticutGrotonUSA

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