Mercury Stable Isotopes Reveal Influence of Foraging Depth on Mercury Concentrations and Growth in Pacific Bluefin Tuna | |
Daniel J. Madigan; Miling Li; Yin Runsheng; Hannes Baumann; Owyn E. Snodgrass; Heidi Dewar; David P. Krabbenhoft; Zofia Baumann; Nicholas S. Fisher; Prentiss Balcom; Elsie M. Sunderland | |
刊名 | Environmental Science & Technology |
2018 | |
卷号 | 52期号:11页码:6256-6264 |
英文摘要 | Pelagic ecosystems are changing due to environmental and anthropogenic forces, with uncertain consequences for the ocean's top predators. Epipelagic and mesopelagic prey resources differ in quality and quantity, but their relative contribution to predator diets has been difficult to track. We measured mercury (Hg) stable isotopes in young (<2 years old) Pacific bluefin tuna (PBFT) and their prey species to explore the influence of foraging depth on growth and methylmercury (MeHg) exposure. PBFT total Hg (THg) in muscle ranged from 0.61 to 1.93 mu g g(-1) dw (1.31 mu g g(-1) dw +/- 0.37 SD; 99% +/- 6% MeHg) and prey ranged from 0.01 to 1.76 mu g g(-1) dw (0.13 mu g g(-1) dw +/- 0.19 SD; 85% +/- 18% MeHg). A systematic decrease in prey delta Hg-202 and Delta Hg-199 with increasing depth of occurrence and discrete isotopic signatures of epipelagic prey (delta Hg-202: 0.74 to 1.49 parts per thousand; Delta Hg-199: 1.76-2.96 parts per thousand) and mesopelagic prey (delta Hg-202: 0.09 to 0.90 parts per thousand; Delta Hg-199: 0.62-1.95 parts per thousand) allowed the use of Hg isotopes to track PBFT foraging depth. An isotopic mixing model was used to estimate the dietary proportion of mesopelagic prey in PBFT, which ranged from 17% to 55%. Increased mesopelagic foraging was significantly correlated with slower growth and higher MeHg concentrations in PBFT. The slower observed growth rates suggest that prey availability and quality could reduce the production of PBFT biomass. |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.gyig.ac.cn/handle/42920512-1/8788] |
专题 | 地球化学研究所_矿床地球化学国家重点实验室 |
作者单位 | 1.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of 13 Sciences, Guiyang 550002, China 2.Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, MA USA 3.School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY USA 4.U.S. Geological Survey, Middleton, WI USA 5.Harvard John A. Paulson School of Engineering and Applied Science, Cambridge, MA USA 6.Fisheries Resources Division, Southwest Fisheries Science Center, National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), La Jolla, California 92037, United States 7.Ocean Associates, Southwest Fisheries Science Center, NMFS, NOAA, La Jolla, California 92037, United States 8.Department of Marine Sciences, University of Connecticut, Groton, CT USA |
推荐引用方式 GB/T 7714 | Daniel J. Madigan;Miling Li;Yin Runsheng;Hannes Baumann;Owyn E. Snodgrass;Heidi Dewar;David P. Krabbenhoft;Zofia Baumann;Nicholas S. Fisher;Prentiss Balcom;Elsie M. Sunderland. Mercury Stable Isotopes Reveal Influence of Foraging Depth on Mercury Concentrations and Growth in Pacific Bluefin Tuna[J]. Environmental Science & Technology,2018,52(11):6256-6264. |
APA | Daniel J. Madigan;Miling Li;Yin Runsheng;Hannes Baumann;Owyn E. Snodgrass;Heidi Dewar;David P. Krabbenhoft;Zofia Baumann;Nicholas S. Fisher;Prentiss Balcom;Elsie M. Sunderland.(2018).Mercury Stable Isotopes Reveal Influence of Foraging Depth on Mercury Concentrations and Growth in Pacific Bluefin Tuna.Environmental Science & Technology,52(11),6256-6264. |
MLA | Daniel J. Madigan;Miling Li;Yin Runsheng;Hannes Baumann;Owyn E. Snodgrass;Heidi Dewar;David P. Krabbenhoft;Zofia Baumann;Nicholas S. Fisher;Prentiss Balcom;Elsie M. Sunderland."Mercury Stable Isotopes Reveal Influence of Foraging Depth on Mercury Concentrations and Growth in Pacific Bluefin Tuna".Environmental Science & Technology 52.11(2018):6256-6264. |
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