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Moura JF, Tavares DC, Lemos LS, Silveira VVB, Siciliano S, Hauser-Davis RA. Variation in mercury concentration in juvenile Magellanic penguins during their migration path along the Southwest Atlantic Ocean. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 238:397-403. [PMID: 29587210 DOI: 10.1016/j.envpol.2018.03.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 03/08/2018] [Accepted: 03/08/2018] [Indexed: 06/08/2023]
Abstract
The vulnerability of seabirds related to their migratory dynamics is frequently linked to environmental problems along the migration path. In this context, Magellanic penguins (Sphenicus magellanicus) seem to be vulnerable to an extensive range of environmental disturbances during their northward migration along the Atlantic waters of South America, which include by catch, marine debris ingestion, overfishing and environmental contamination. In this study, we investigate mercury accumulation in muscle and hepatic tissues of juveniles penguins collected along the Brazilian coast during three migratory seasonal years (2006, 2008 and 2012) and three areas along a latitudinal gradient. We found significant differences in Hg levels across the years, with higher hepatic Hg levels found in tissues of penguins sampled in 2008. The higher Hg levels in samples of penguins from 2008 might be attributed to variations in body condition or Hg uptake, associated with the trophic imbalance linked to an extreme El Niño event during that year. Significant differences in Hg accumulation across the latitudinal areas were also observed. The penguins sampled at the farthest area from the breeding ground presented the higher levels of Hg and also the poorest body condition. Body condition and other traits may influence the levels of chemical pollutants and decrease the migratory success rate in the juvenile age phase, compromising population dynamics.
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Affiliation(s)
- Jailson F Moura
- Leibniz Centre for Tropical Marine Research - ZMT, Bremen, Germany.
| | - Davi C Tavares
- Leibniz Centre for Tropical Marine Research - ZMT, Bremen, Germany
| | - Leila S Lemos
- Department of Fisheries and Wildlife, Oregon State University, Newport, USA
| | | | | | - Rachel A Hauser-Davis
- Centro de Estudos da Saúde do Trabalhador e Ecologia Humana, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
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Yoon M, Jo MR, Kim PH, Choi WS, Kang SI, Choi SG, Lee JH, Lee HC, Son KT, Mok JS. Total and Methyl Mercury Concentrations in Antarctic Toothfish (Dissostichus mawsoni): Health Risk Assessment. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 100:748-753. [PMID: 29564485 DOI: 10.1007/s00128-018-2326-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 03/15/2018] [Indexed: 06/08/2023]
Abstract
The concentrations of total mercury (THg) in different organs of the Antarctic toothfish (Dissostichus mawsoni) collected from CCAMLR research blocks in Subarea 88.3 and Division 58.4.1 off the coast of Antarctica were determined. The results revealed THg concentrations of 0.165 ± 0.095 mg/kg (0.023-0.454 mg/kg, wet weight) in the Antarctic toothfish. In muscle, methyl mercury (MeHg) accounted for approximately 40% of the THg. In a comparison analysis, muscle and liver tended to bioaccumulate the highest levels of THg, and both THg and MeHg contents showed correlations with fish length and weight. Compared with international guidelines, fish contained 2.5-6.4% and 4.0-10.3% of the provisional tolerable weekly intake for THg recommended by the Joint FAO/WHO Expert Committee on Food Additives and the tolerable weekly intake for MeHg proposed by the European Food Safety Authority, respectively. These results suggest that consumption of the Antarctic toothfish presents no health risk to humans.
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Affiliation(s)
- Minchul Yoon
- Food Safety and Processing Research Division, National Institute of Fisheries Science, Busan, 46083, Republic of Korea
| | - Mi Ra Jo
- Food Safety and Processing Research Division, National Institute of Fisheries Science, Busan, 46083, Republic of Korea
| | - Poong Ho Kim
- Food Safety and Processing Research Division, National Institute of Fisheries Science, Busan, 46083, Republic of Korea
| | - Woo Seok Choi
- Food Safety and Processing Research Division, National Institute of Fisheries Science, Busan, 46083, Republic of Korea
| | - Sang In Kang
- Department of Seafood and Aquaculture Science/Institute of Marine Industry, Gyeongsang National University, Tongyeong, 53063, Republic of Korea
| | - Seok Gwan Choi
- Distant-Water Fisheries Resources Division, National Institute of Fisheries Science, Busan, 46083, Republic of Korea
| | - Jong Hee Lee
- Distant-Water Fisheries Resources Division, National Institute of Fisheries Science, Busan, 46083, Republic of Korea
| | - Hee Chung Lee
- Food Safety and Processing Research Division, National Institute of Fisheries Science, Busan, 46083, Republic of Korea
| | - Kwang Tae Son
- South-East Sea Fisheries Research Institute, National Institute of Fisheries Science, Tongyeong, 53085, Republic of Korea
| | - Jong Soo Mok
- Food Safety and Processing Research Division, National Institute of Fisheries Science, Busan, 46083, Republic of Korea.
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