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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1007/s10646-009-0306-5
|2 doi
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|a pubmed24n0623.xml
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|a (DE-627)NLM187004498
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|a (NLM)19277860
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Lepak, Jesse M
|e verfasserin
|4 aut
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| 245 |
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|a Changes in mercury bioaccumulation in an apex predator in response to removal of an introduced competitor
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 21.08.2009
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|a Date Revised 20.10.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a We evaluated methylmercury (MeHg) concentrations in native apex predators, lake trout Salvelinus namaycush before and after the large-scale removal of introduced predators, smallmouth bass Micropterus dolomieu in a 270 ha Adirondack lake. Previous studies show that removing competitors can result in increased growth and decreased mercury concentrations in remaining fish. Instead, we observed a significant increase in lake trout MeHg concentrations despite observed increases in lake trout growth. Bioenergetics simulations predicted similar increases in lake trout MeHg concentrations. Higher MeHg in prey fish (post-removal diet) relative to invertebrates (pre-removal diet) was the most important factor increasing lake trout MeHg concentrations. However, this effect was counteracted by increased lake trout growth (i.e., growth dilution) likely due to a combination of decreased foraging costs and an increase in prey energy density. These data provide evidence for a mechanism (diet shift due to reduced competition) by which changes in food web structure can influence MeHg concentrations in top predators
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|a Comparative Study
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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| 650 |
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|a Research Support, U.S. Gov't, Non-P.H.S.
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| 650 |
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|a Methylmercury Compounds
|2 NLM
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| 650 |
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|a Water Pollutants, Chemical
|2 NLM
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| 700 |
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|a Robinson, Jason M
|e verfasserin
|4 aut
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|a Kraft, Clifford E
|e verfasserin
|4 aut
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| 700 |
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|a Josephson, Daniel C
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Ecotoxicology (London, England)
|d 1992
|g 18(2009), 5 vom: 28. Juli, Seite 488-98
|w (DE-627)NLM098212214
|x 1573-3017
|7 nnns
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| 773 |
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|g volume:18
|g year:2009
|g number:5
|g day:28
|g month:07
|g pages:488-98
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|u http://dx.doi.org/10.1007/s10646-009-0306-5
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