Total and Methyl Mercury Accumulation in 1994–1995 Lake Michigan Lake Trout and Forage Fish
As part of the Lake Michigan Mass Balance Project, total and methyl mercury were determined for lake trout (Salvelinus namaycush) and five forage fish species collected from Lake Michigan near Saugatuck, Michigan, and Port Washington, Sheboygan Reef, and Sturgeon Bay, Wisconsin, between 1994 and 199...
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ftbioone:10.1016/j.jglr.2009.05.004 2024-06-02T08:05:33+00:00 Total and Methyl Mercury Accumulation in 1994–1995 Lake Michigan Lake Trout and Forage Fish Brian Raymond Ronald Rossmann Brian Raymond Ronald Rossmann world 2009-09-01 text/HTML https://doi.org/10.1016/j.jglr.2009.05.004 en eng International Association for Great Lakes Research doi:10.1016/j.jglr.2009.05.004 All rights reserved. https://doi.org/10.1016/j.jglr.2009.05.004 Text 2009 ftbioone https://doi.org/10.1016/j.jglr.2009.05.004 2024-05-07T00:47:03Z As part of the Lake Michigan Mass Balance Project, total and methyl mercury were determined for lake trout (Salvelinus namaycush) and five forage fish species collected from Lake Michigan near Saugatuck, Michigan, and Port Washington, Sheboygan Reef, and Sturgeon Bay, Wisconsin, between 1994 and 1995. With a mean concentration of 179 ng/g wet wt., whole lake trout total mercury (HgT) concentrations ranged between 27.6 and 348 ng/g wet wt. For combined sites, 1–4 yrs, 5–6 yrs, 7–11 yrs, and 12–15 yrs lake trout mean HgT concentrations were 73.7, 130, 212, and 280 ng/g, respectively. Forage fish species alewife (Alosa pseudoharengus), bloater (Coregonus hoyi), slimy sculpin (Cottus cognatus), deepwater sculpin (Myoxocephalus thompsoni), and rainbow smelt (Osmerus mordax) had mean HgT concentrations of 63.8, 55.3, 36.7, 51.4, and 35.2 ng/g wet wt., respectively. With the exception of alewife, bloater, and slimy sculpin, all fish species contained approximately 100% methyl mercury (MeHg). Field bioaccumulation factors (BAF) were consistent with a Lake Michigan food chain that is more efficient at transferring MeHg to higher trophic levels than some inland lakes. This and other studies of lake trout from Lake Michigan document decreasing HgT concentrations in lake trout from 1971 to 1985 and constant or increasing concentrations between 1985 and 2000. These observations were supported by a similar trend in Lake Michigan Hg sediment fluxes. To our knowledge, this is the most intense two year study of mercury in fish for any Great Lake or other large fresh water system and is one of the most complete studies of mercury cycling in the Lake Michigan food chain. Text Cottus cognatus Slimy sculpin BioOne Online Journals Journal of Great Lakes Research 35 3 438 446 |
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description |
As part of the Lake Michigan Mass Balance Project, total and methyl mercury were determined for lake trout (Salvelinus namaycush) and five forage fish species collected from Lake Michigan near Saugatuck, Michigan, and Port Washington, Sheboygan Reef, and Sturgeon Bay, Wisconsin, between 1994 and 1995. With a mean concentration of 179 ng/g wet wt., whole lake trout total mercury (HgT) concentrations ranged between 27.6 and 348 ng/g wet wt. For combined sites, 1–4 yrs, 5–6 yrs, 7–11 yrs, and 12–15 yrs lake trout mean HgT concentrations were 73.7, 130, 212, and 280 ng/g, respectively. Forage fish species alewife (Alosa pseudoharengus), bloater (Coregonus hoyi), slimy sculpin (Cottus cognatus), deepwater sculpin (Myoxocephalus thompsoni), and rainbow smelt (Osmerus mordax) had mean HgT concentrations of 63.8, 55.3, 36.7, 51.4, and 35.2 ng/g wet wt., respectively. With the exception of alewife, bloater, and slimy sculpin, all fish species contained approximately 100% methyl mercury (MeHg). Field bioaccumulation factors (BAF) were consistent with a Lake Michigan food chain that is more efficient at transferring MeHg to higher trophic levels than some inland lakes. This and other studies of lake trout from Lake Michigan document decreasing HgT concentrations in lake trout from 1971 to 1985 and constant or increasing concentrations between 1985 and 2000. These observations were supported by a similar trend in Lake Michigan Hg sediment fluxes. To our knowledge, this is the most intense two year study of mercury in fish for any Great Lake or other large fresh water system and is one of the most complete studies of mercury cycling in the Lake Michigan food chain. |
author2 |
Brian Raymond Ronald Rossmann |
format |
Text |
author |
Brian Raymond Ronald Rossmann |
spellingShingle |
Brian Raymond Ronald Rossmann Total and Methyl Mercury Accumulation in 1994–1995 Lake Michigan Lake Trout and Forage Fish |
author_facet |
Brian Raymond Ronald Rossmann |
author_sort |
Brian Raymond |
title |
Total and Methyl Mercury Accumulation in 1994–1995 Lake Michigan Lake Trout and Forage Fish |
title_short |
Total and Methyl Mercury Accumulation in 1994–1995 Lake Michigan Lake Trout and Forage Fish |
title_full |
Total and Methyl Mercury Accumulation in 1994–1995 Lake Michigan Lake Trout and Forage Fish |
title_fullStr |
Total and Methyl Mercury Accumulation in 1994–1995 Lake Michigan Lake Trout and Forage Fish |
title_full_unstemmed |
Total and Methyl Mercury Accumulation in 1994–1995 Lake Michigan Lake Trout and Forage Fish |
title_sort |
total and methyl mercury accumulation in 1994–1995 lake michigan lake trout and forage fish |
publisher |
International Association for Great Lakes Research |
publishDate |
2009 |
url |
https://doi.org/10.1016/j.jglr.2009.05.004 |
op_coverage |
world |
genre |
Cottus cognatus Slimy sculpin |
genre_facet |
Cottus cognatus Slimy sculpin |
op_source |
https://doi.org/10.1016/j.jglr.2009.05.004 |
op_relation |
doi:10.1016/j.jglr.2009.05.004 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1016/j.jglr.2009.05.004 |
container_title |
Journal of Great Lakes Research |
container_volume |
35 |
container_issue |
3 |
container_start_page |
438 |
op_container_end_page |
446 |
_version_ |
1800750404332421120 |