Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments
Feeding experiments were performed to investigate mercury (Hg) isotope fractionation during trophic transfer and internal distribution of total Hg (THg) in marine fish on exposure to natural seafood. Young‐of‐the‐year amberjack ( Seriola dumerili ) were fed with either blackfin tuna ( Thunnus atlant...
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Wiley Periodicals, Inc.
2013
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Online Access: | https://hdl.handle.net/2027.42/100149 https://doi.org/10.1002/etc.2313 |
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ftumdeepblue:oai:deepblue.lib.umich.edu:2027.42/100149 |
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record_format |
openpolar |
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Open Polar |
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University of Michigan: Deep Blue |
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ftumdeepblue |
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unknown |
topic |
Fish Methylmercury Internal Distribution Trophic Transfer Stable Hg Isotope Biological Chemistry Natural Resources and Environment Science |
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Fish Methylmercury Internal Distribution Trophic Transfer Stable Hg Isotope Biological Chemistry Natural Resources and Environment Science Kwon, Sae Yun Blum, Joel D Chirby, Michelle A. Chesney, Edward J. Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments |
topic_facet |
Fish Methylmercury Internal Distribution Trophic Transfer Stable Hg Isotope Biological Chemistry Natural Resources and Environment Science |
description |
Feeding experiments were performed to investigate mercury (Hg) isotope fractionation during trophic transfer and internal distribution of total Hg (THg) in marine fish on exposure to natural seafood. Young‐of‐the‐year amberjack ( Seriola dumerili ) were fed with either blackfin tuna ( Thunnus atlanticus 2647 ng/g THg) or brown shrimp ( Farfantepenaeus aztecus 25.1 ng/g THg) for 80 d or 50 d, respectively, and dissected for muscle, liver, kidney, brain, and blood. After 30 d of tuna consumption, Hg isotopes (δ 202 Hg and Δ 199 Hg) of the amberjack organs shifted to the tuna value (δ 202 Hg = 0.55‰, Δ 199 Hg = 1.54‰,), demonstrating the absence of Hg isotope fractionation. When amberjack were fed a shrimp diet, there was an initial mixing of the amberjack organs toward the shrimp value (δ 202 Hg = −0.48‰, Δ 199 Hg = 0.32‰), followed by a cessation of further shifts in Δ 199 Hg and a small shift in δ 202 Hg. The failure of Δ 199 Hg to reach the shrimp value can be attributed to a reduction in Hg bioaccumulation from shrimp resulting from feeding inhibition and the δ 202 Hg shift can be attributed to a small internal fractionation during excretion. Given that the feeding rate and Hg concentration of the diet can influence internal Hg isotope distribution, these parameters must be considered in biosentinel fish studies. Environ Toxicol Chem 2013;32:2322–2330. © 2013 SETAC Peer Reviewed http://deepblue.lib.umich.edu/bitstream/2027.42/100149/1/etc2313.pdf |
format |
Article in Journal/Newspaper |
author |
Kwon, Sae Yun Blum, Joel D Chirby, Michelle A. Chesney, Edward J. |
author_facet |
Kwon, Sae Yun Blum, Joel D Chirby, Michelle A. Chesney, Edward J. |
author_sort |
Kwon, Sae Yun |
title |
Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments |
title_short |
Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments |
title_full |
Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments |
title_fullStr |
Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments |
title_full_unstemmed |
Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments |
title_sort |
application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments |
publisher |
Wiley Periodicals, Inc. |
publishDate |
2013 |
url |
https://hdl.handle.net/2027.42/100149 https://doi.org/10.1002/etc.2313 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Kwon, Sae Yun; Blum, Joel D.; Chirby, Michelle A.; Chesney, Edward J. (2013). "Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments." Environmental Toxicology and Chemistry 32(10): 2322-2330. <http://hdl.handle.net/2027.42/100149> 0730-7268 1552-8618 https://hdl.handle.net/2027.42/100149 doi:10.1002/etc.2313 Environmental Toxicology and Chemistry Riisgard HU, Hansen S. 1990. Biomagnification of mercury in a marine grazing food‐chain: Algal cells Phaedodactylum trichornutum, mussels Mytilus edulis and flounder Platichthys flesus studied by means of a stepwise reduction‐CVAA method. Mar Ecol Prog Ser 62: 259 – 270. Mergler D, Anderson HA, Chan LHM, Mahaffey KR, Murray M, Sakamoto M, Stern AH. 2007. Methylmercury exposure and health effects in humans: A worldwide concern. Ambio 36: 3 – 11. Sunderland EM. 2007. Mercury exposure from domestic and imported estuarine and marine fish in the U.S. seafood market. Environ Health Perspect 115: 235 – 242. Kwon SY, Blum JD, Carvan MJ, Basu N, Head JA, Madenjian CP, David SR. 2012. Absence of fractionation of mercury isotopes during trophic transfer of methylmercury to freshwater fish in captivity. Environ Sci Technol 46: 7527 – 7534. Perrot V, Pastukhov MV, Epov VN, Husted S, Donard OFX, Amouroux D. 2012. Higher mass‐independent isotope fractionation of methylmercury in the pelagic food web of Lake Baikal (Russia). Environ Sci Technol 46: 5902 – 5911. Demers JD, Blum JD, Zak DR. 2013. Mercury isotopes in a forested ecosystem: Implications for air‐surface exchange dynamics and the global mercury cycle. Global Biogeochem Cy 27: 1 – 17. Estrade N, Carignan J, Donard OFX. 2010. Isotope tracing of atmospheric mercury sources in an urban area of northeastern France. Environ Sci Technol 44: 6062 – 6067. Yin R, Feng X, Meng B. 2013. Stable mercury isotope variation in rice plants ( Oryza sativa L.) from the Wanshan mercury mining district, SW China. Environ Sci Technol 47: 2238 – 2245. Badalamenti F, D'Anna G, Lopiano L, Scilipoti D, Mazzola A. 1995. Feeding habits of young‐of‐the‐year greater amberjack Seriola dumerili (Risso, 1810) along the N/W Sicilian coast. Sci Mar 59: 317 – 323. Hammerschmidt CR, Fitzgerald WF. 2006. Methylmercury in freshwater fish linked to atmospheric mercury deposition. Environ Sci Technol 40: 7764 – 7770. Zook EG, Powell JJ, Hackley BM, Emerson JA, Brooker JR, Knobl GM Jr. 1976. National marine fisheries service preliminary survey of selected seafoods for mercury, lead, cadmium, chromium, and arsenic content. J Agric Food Chem 24: 47 – 53. de Oliveira Ribeiro CA, Rouleau C, Pelletier E, Audet C, Tjalve H. 1999. Distribution kinetics of dietary methylmercury in the Arctic charr ( Salvelinus alpinus ). Environ Sci Technol 33: 902 – 907. Foucher D, Ogrinc N, Hintelmann H. 2009. Tracing mercury contamination from the Idrija mining region (Slovenia) to the Gulf of Trieste using Hg isotope ratio measurements. Environ Sci Technol 43: 33 – 39. Blum JD, Popp BN, Johnson MW, Drazen JC, Choy A. 2012. Mercury isotope constraints on depth of methylation and degree of photo‐degradation of methylmercury in the Central Pacific Ocean. Abstracts, 2012 Fall Meeting, American Geophysical Union, December, San Francisco, CA, USA, December 3–7. Lerner JJ, Mason RP. 2004. Methylmercury uptake and distribution kinetics in sheepshead minnows, Cyprinodon variegates, after exposure to CH 3 Hg‐spiked food. Environ Toxicol Chem 23: 2138 – 2146. McCloskey JT, Schultz IR, Newman MC. 1998. Estimating the oral bioavailbility of methylmercury to channel catfish ( Ictalurus punctatus ). Environ Sci Technol 17: 1524 – 1529. Rudd JW, Furutani A, Turner MA. 1980. Mercury methylation by fish intestinal contents. Appl Environ Microbiol 40: 777 – 782. Pak KR, Bartha R. 1998. Mercury methylmation and demethyation in anoxic lake sediments and by strictly anaerobic bacteria. Appl Environ Microbiol 64: 1013 – 1017. Tseng YC, Hwang PP. 2008. Some insights into energy metabolism for osmoregulation in fish. Comp Biochem Phys C 148: 419 – 429. Van Walleghen JLA, Blanchfield PJ, Hintelmann H. 2007. Elimination of mercury by yellow perch in the wild. Environ Sci Technol 41: 5895 – 5901. Laffont L, Sonke JE, Maurice L, Monrroy SL, Chincheros J, Amouroux D, Behra P. 2011. Hg speciation and stable isotope signature in human hair as a tracer for dietary and occupational exposure to mercury. Environ Sci Technol 45: 9910 – 9916. Pickhardt PC, Stepanova M, Fisher NS. 2006. Contrasting uptake routes and tissue distribution of inorganic and methylmercury in mosquitofish ( Gambusia affinis ) and redear sunfish ( Lepomis microlophus ). Environ Toxicol Chem 25: 2132 – 2142. Wang WX, Wong RSK. 2003. Bioaccumulation kinetics and exposure pathways of inorganic mercury and methylmercury in a marine fish, the sweetlips Plectorhinchus gibbosus. Mar Ecol Prog Seri 261: 257 – 268. Hammerschmidt CR, Fitzgerald WF. 2006. Methylmercury cycling in sediments on the continental shelf of southern New England. Geochim Cosmochim Acta 70: 918 – 930. Chumchal MM, Manbright KD. 2009. Ecological factors regulating mercury contamination of fish from Caddo Lake, Texas, USA. Environ Toxicol Chem 28: 962 – 972. Swanson HK, Kidd KA. 2010. Mercury concentrations in arctic food fishes reflect the presence of anadromous arctic charr ( Salvelinus alpinus ), species, and life history. Environ Sci Technol 44: 3286 – 3292. Gehrke GE, Blum JD, Slotton DG, Greenfield BK. 2011. Mercury isotope link mercury in San Francisco Bay forage fish to surface sediments. Environ Sci Technol 45: 1264 – 1270. Point D, Sonke JE, Day RD, Roseneau DG, Hobson KA, Vander Pol SS, Moors AJ, Pugh RS, Donard OFX, Becker PR. 2011. Methylmercury photodegradation influenced by sea‐ice cover in Arctic marine ecosystems. Nature Geosci 4: 188 – 194. Senn DB, Chesney EJ, Blum JD, Bank MS, Maage A, Shine JP. 2010. Stable isotope (N, C, Hg) study of methylmercury sources and trophic transfer in the northern Gulf of Mexico. Environ Sci Technol 44: 1630 – 1637. Sherman LS, Blum JD. 2012. Mercury stable isotopes in sediments and largemouth bass from Florida lakes, USA. Sci Total Environ 448: 163 – 175. Blum JD, Bergquist BA. 2007. Reporting of variations in the natural isotopic composition of mercury. Anal Bioanal Chem 388: 353 – 359. Rodriguez‐Gonzalez P, Epov VN, Bridou R, Tessier E, Guyoneud R, Monperrus M, Amouroux D. 2009. Species‐specific stable isotope fractionation of mercury during Hg(II) methylation by an anaerobic bacteria ( Desulfobulbus propionicus ) under dark conditions. Envrion Sci Technol 43: 9183 – 9188. Kritee K, Barkay T, Blum JD. 2009. Mass dependent stable isotope fractionation of mercury during mer mediated microbial degradation of monomethylmercury. Geochim Cosmochim Acta 73: 1285 – 1296. Bergquist BA, Blum JD. 2007. Mass‐dependent and ‐independent fractionation of Hg isotopes by photoreduction in aquatic systems. Science 318: 417 – 420. Schauble EA. 2007. Role of nuclear volume in driving equilibrium stable isotope fractionation of mercury, thallium, and other very heavy elements. Geochim Cosmochim Acta 71: 2170 – 2189. Buchachenko AL, Ivanov VL, Roznyatovskii VA, Vorob'ev AK, Ustynyuk YA. 2008. Inversion of the sign of the magnetic isotope effect of mercury in photolysis of substituted dibenzylmercury. Dokl Phys Chem 420: 85 – 87. Zheng W, Hintelmann H. 2009. Mercury isotope fractionation during photoreduction in natural water is controlled by its Hg/DOC ratio. Geochim Cosmochim Acta 27: 6704 – 6715. Gantner N, Hintelmann H, Zheng W, Muir DC. 2009. Variations in stable isotope fractionation of Hg in food webs of Arctic lakes. Environ Sci Technol 43: 9148 – 9154. Chen JB, Hintelmann H, Feng XB, Dimock B. 2013. Unusual fractionation of both odd and even mercury isotopes in precipitation from Peterborough, ON, Canada. Geochim Cosmochim Acta 90: 33 – 46. Gratz LE, Keeler GJ, Blum JD, Sherman LS. 2010. Isotopic composition and fractionation of mercury in Great Lakes precipitation and ambient air. Environ Sci Technol 44: 7764 – 7770. |
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ftumdeepblue:oai:deepblue.lib.umich.edu:2027.42/100149 2023-08-20T04:03:10+02:00 Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments Kwon, Sae Yun Blum, Joel D Chirby, Michelle A. Chesney, Edward J. 2013-10 application/pdf https://hdl.handle.net/2027.42/100149 https://doi.org/10.1002/etc.2313 unknown Wiley Periodicals, Inc. Kwon, Sae Yun; Blum, Joel D.; Chirby, Michelle A.; Chesney, Edward J. (2013). "Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments." Environmental Toxicology and Chemistry 32(10): 2322-2330. <http://hdl.handle.net/2027.42/100149> 0730-7268 1552-8618 https://hdl.handle.net/2027.42/100149 doi:10.1002/etc.2313 Environmental Toxicology and Chemistry Riisgard HU, Hansen S. 1990. Biomagnification of mercury in a marine grazing food‐chain: Algal cells Phaedodactylum trichornutum, mussels Mytilus edulis and flounder Platichthys flesus studied by means of a stepwise reduction‐CVAA method. Mar Ecol Prog Ser 62: 259 – 270. Mergler D, Anderson HA, Chan LHM, Mahaffey KR, Murray M, Sakamoto M, Stern AH. 2007. Methylmercury exposure and health effects in humans: A worldwide concern. Ambio 36: 3 – 11. Sunderland EM. 2007. Mercury exposure from domestic and imported estuarine and marine fish in the U.S. seafood market. Environ Health Perspect 115: 235 – 242. Kwon SY, Blum JD, Carvan MJ, Basu N, Head JA, Madenjian CP, David SR. 2012. Absence of fractionation of mercury isotopes during trophic transfer of methylmercury to freshwater fish in captivity. Environ Sci Technol 46: 7527 – 7534. Perrot V, Pastukhov MV, Epov VN, Husted S, Donard OFX, Amouroux D. 2012. Higher mass‐independent isotope fractionation of methylmercury in the pelagic food web of Lake Baikal (Russia). Environ Sci Technol 46: 5902 – 5911. Demers JD, Blum JD, Zak DR. 2013. Mercury isotopes in a forested ecosystem: Implications for air‐surface exchange dynamics and the global mercury cycle. Global Biogeochem Cy 27: 1 – 17. Estrade N, Carignan J, Donard OFX. 2010. Isotope tracing of atmospheric mercury sources in an urban area of northeastern France. Environ Sci Technol 44: 6062 – 6067. Yin R, Feng X, Meng B. 2013. Stable mercury isotope variation in rice plants ( Oryza sativa L.) from the Wanshan mercury mining district, SW China. Environ Sci Technol 47: 2238 – 2245. Badalamenti F, D'Anna G, Lopiano L, Scilipoti D, Mazzola A. 1995. Feeding habits of young‐of‐the‐year greater amberjack Seriola dumerili (Risso, 1810) along the N/W Sicilian coast. Sci Mar 59: 317 – 323. Hammerschmidt CR, Fitzgerald WF. 2006. Methylmercury in freshwater fish linked to atmospheric mercury deposition. Environ Sci Technol 40: 7764 – 7770. Zook EG, Powell JJ, Hackley BM, Emerson JA, Brooker JR, Knobl GM Jr. 1976. National marine fisheries service preliminary survey of selected seafoods for mercury, lead, cadmium, chromium, and arsenic content. J Agric Food Chem 24: 47 – 53. de Oliveira Ribeiro CA, Rouleau C, Pelletier E, Audet C, Tjalve H. 1999. Distribution kinetics of dietary methylmercury in the Arctic charr ( Salvelinus alpinus ). Environ Sci Technol 33: 902 – 907. Foucher D, Ogrinc N, Hintelmann H. 2009. Tracing mercury contamination from the Idrija mining region (Slovenia) to the Gulf of Trieste using Hg isotope ratio measurements. Environ Sci Technol 43: 33 – 39. Blum JD, Popp BN, Johnson MW, Drazen JC, Choy A. 2012. Mercury isotope constraints on depth of methylation and degree of photo‐degradation of methylmercury in the Central Pacific Ocean. Abstracts, 2012 Fall Meeting, American Geophysical Union, December, San Francisco, CA, USA, December 3–7. Lerner JJ, Mason RP. 2004. Methylmercury uptake and distribution kinetics in sheepshead minnows, Cyprinodon variegates, after exposure to CH 3 Hg‐spiked food. Environ Toxicol Chem 23: 2138 – 2146. McCloskey JT, Schultz IR, Newman MC. 1998. Estimating the oral bioavailbility of methylmercury to channel catfish ( Ictalurus punctatus ). Environ Sci Technol 17: 1524 – 1529. Rudd JW, Furutani A, Turner MA. 1980. Mercury methylation by fish intestinal contents. Appl Environ Microbiol 40: 777 – 782. Pak KR, Bartha R. 1998. Mercury methylmation and demethyation in anoxic lake sediments and by strictly anaerobic bacteria. Appl Environ Microbiol 64: 1013 – 1017. Tseng YC, Hwang PP. 2008. Some insights into energy metabolism for osmoregulation in fish. Comp Biochem Phys C 148: 419 – 429. Van Walleghen JLA, Blanchfield PJ, Hintelmann H. 2007. Elimination of mercury by yellow perch in the wild. Environ Sci Technol 41: 5895 – 5901. Laffont L, Sonke JE, Maurice L, Monrroy SL, Chincheros J, Amouroux D, Behra P. 2011. Hg speciation and stable isotope signature in human hair as a tracer for dietary and occupational exposure to mercury. Environ Sci Technol 45: 9910 – 9916. Pickhardt PC, Stepanova M, Fisher NS. 2006. Contrasting uptake routes and tissue distribution of inorganic and methylmercury in mosquitofish ( Gambusia affinis ) and redear sunfish ( Lepomis microlophus ). Environ Toxicol Chem 25: 2132 – 2142. Wang WX, Wong RSK. 2003. Bioaccumulation kinetics and exposure pathways of inorganic mercury and methylmercury in a marine fish, the sweetlips Plectorhinchus gibbosus. Mar Ecol Prog Seri 261: 257 – 268. Hammerschmidt CR, Fitzgerald WF. 2006. Methylmercury cycling in sediments on the continental shelf of southern New England. Geochim Cosmochim Acta 70: 918 – 930. Chumchal MM, Manbright KD. 2009. Ecological factors regulating mercury contamination of fish from Caddo Lake, Texas, USA. Environ Toxicol Chem 28: 962 – 972. Swanson HK, Kidd KA. 2010. Mercury concentrations in arctic food fishes reflect the presence of anadromous arctic charr ( Salvelinus alpinus ), species, and life history. Environ Sci Technol 44: 3286 – 3292. Gehrke GE, Blum JD, Slotton DG, Greenfield BK. 2011. Mercury isotope link mercury in San Francisco Bay forage fish to surface sediments. Environ Sci Technol 45: 1264 – 1270. Point D, Sonke JE, Day RD, Roseneau DG, Hobson KA, Vander Pol SS, Moors AJ, Pugh RS, Donard OFX, Becker PR. 2011. Methylmercury photodegradation influenced by sea‐ice cover in Arctic marine ecosystems. Nature Geosci 4: 188 – 194. Senn DB, Chesney EJ, Blum JD, Bank MS, Maage A, Shine JP. 2010. Stable isotope (N, C, Hg) study of methylmercury sources and trophic transfer in the northern Gulf of Mexico. Environ Sci Technol 44: 1630 – 1637. Sherman LS, Blum JD. 2012. Mercury stable isotopes in sediments and largemouth bass from Florida lakes, USA. Sci Total Environ 448: 163 – 175. Blum JD, Bergquist BA. 2007. Reporting of variations in the natural isotopic composition of mercury. Anal Bioanal Chem 388: 353 – 359. Rodriguez‐Gonzalez P, Epov VN, Bridou R, Tessier E, Guyoneud R, Monperrus M, Amouroux D. 2009. Species‐specific stable isotope fractionation of mercury during Hg(II) methylation by an anaerobic bacteria ( Desulfobulbus propionicus ) under dark conditions. Envrion Sci Technol 43: 9183 – 9188. Kritee K, Barkay T, Blum JD. 2009. Mass dependent stable isotope fractionation of mercury during mer mediated microbial degradation of monomethylmercury. Geochim Cosmochim Acta 73: 1285 – 1296. Bergquist BA, Blum JD. 2007. Mass‐dependent and ‐independent fractionation of Hg isotopes by photoreduction in aquatic systems. Science 318: 417 – 420. Schauble EA. 2007. Role of nuclear volume in driving equilibrium stable isotope fractionation of mercury, thallium, and other very heavy elements. Geochim Cosmochim Acta 71: 2170 – 2189. Buchachenko AL, Ivanov VL, Roznyatovskii VA, Vorob'ev AK, Ustynyuk YA. 2008. Inversion of the sign of the magnetic isotope effect of mercury in photolysis of substituted dibenzylmercury. Dokl Phys Chem 420: 85 – 87. Zheng W, Hintelmann H. 2009. Mercury isotope fractionation during photoreduction in natural water is controlled by its Hg/DOC ratio. Geochim Cosmochim Acta 27: 6704 – 6715. Gantner N, Hintelmann H, Zheng W, Muir DC. 2009. Variations in stable isotope fractionation of Hg in food webs of Arctic lakes. Environ Sci Technol 43: 9148 – 9154. Chen JB, Hintelmann H, Feng XB, Dimock B. 2013. Unusual fractionation of both odd and even mercury isotopes in precipitation from Peterborough, ON, Canada. Geochim Cosmochim Acta 90: 33 – 46. Gratz LE, Keeler GJ, Blum JD, Sherman LS. 2010. Isotopic composition and fractionation of mercury in Great Lakes precipitation and ambient air. Environ Sci Technol 44: 7764 – 7770. IndexNoFollow Fish Methylmercury Internal Distribution Trophic Transfer Stable Hg Isotope Biological Chemistry Natural Resources and Environment Science Article 2013 ftumdeepblue https://doi.org/10.1002/etc.2313 2023-07-31T20:46:40Z Feeding experiments were performed to investigate mercury (Hg) isotope fractionation during trophic transfer and internal distribution of total Hg (THg) in marine fish on exposure to natural seafood. Young‐of‐the‐year amberjack ( Seriola dumerili ) were fed with either blackfin tuna ( Thunnus atlanticus 2647 ng/g THg) or brown shrimp ( Farfantepenaeus aztecus 25.1 ng/g THg) for 80 d or 50 d, respectively, and dissected for muscle, liver, kidney, brain, and blood. After 30 d of tuna consumption, Hg isotopes (δ 202 Hg and Δ 199 Hg) of the amberjack organs shifted to the tuna value (δ 202 Hg = 0.55‰, Δ 199 Hg = 1.54‰,), demonstrating the absence of Hg isotope fractionation. When amberjack were fed a shrimp diet, there was an initial mixing of the amberjack organs toward the shrimp value (δ 202 Hg = −0.48‰, Δ 199 Hg = 0.32‰), followed by a cessation of further shifts in Δ 199 Hg and a small shift in δ 202 Hg. The failure of Δ 199 Hg to reach the shrimp value can be attributed to a reduction in Hg bioaccumulation from shrimp resulting from feeding inhibition and the δ 202 Hg shift can be attributed to a small internal fractionation during excretion. Given that the feeding rate and Hg concentration of the diet can influence internal Hg isotope distribution, these parameters must be considered in biosentinel fish studies. Environ Toxicol Chem 2013;32:2322–2330. © 2013 SETAC Peer Reviewed http://deepblue.lib.umich.edu/bitstream/2027.42/100149/1/etc2313.pdf Article in Journal/Newspaper Arctic University of Michigan: Deep Blue Environmental Toxicology and Chemistry 32 10 2322 2330 |