Mercury–selenium concentrations in silky sharks (Carcharhinus falciformis) and their toxicological concerns in the southern Mexican Pacific

Juanita Rodríguez-Gutiérrez; Felipe Galván-Magaña; Tania Jacobo-Estrada; Laura Arreola-Mendoza; S. B. Sujitha; M. P. Jonathan

doi:10.1016/j.marpolbul.2020.111011

Mercury–selenium concentrations in silky sharks (Carcharhinus falciformis) and their toxicological concerns in the southern Mexican Pacific

Juanita Rodríguez-Gutiérrez, Felipe Galván-Magaña, Tania Jacobo-Estrada, Laura Arreola-Mendoza, S. B. Sujitha, M. P. Jonathan

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

© 2020 Mercury- Selenium concentrations were determined in 136 samples of Carcharhinus falciformis (Silky shark) sampled from the Chiapas coast, Gulf of Tehuantepec, Mexico during August 2014 – January 2015. Average Hg concentrations in neonates and juveniles (all values in μg g−1 w.w.) were found to be 0.115 and 0.129 respectively, below the maximum permissible limit of 1 μg g−1 set by the Mexican government. However, excess Se values (all values in μg g−1 d.w.) observed in neonates (5.366) and juveniles (2.815) prove to maintain antioxidant ability by inducing Hg excretion and reducing its toxicity. Calculated Biomagnification Factor (BMFTL) denoted high values for the prey C.hippurus, signifying absolute magnification of Hg and Se along the food chain. This study provides key toxicological evidences of Hg- Se interaction and their effects in marine systems and human health.

Original language	American English
Journal	Marine Pollution Bulletin
DOIs	https://doi.org/10.1016/j.marpolbul.2020.111011
State	Published - 1 Apr 2020

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title = "Mercury–selenium concentrations in silky sharks (Carcharhinus falciformis) and their toxicological concerns in the southern Mexican Pacific",

abstract = "{\textcopyright} 2020 Mercury- Selenium concentrations were determined in 136 samples of Carcharhinus falciformis (Silky shark) sampled from the Chiapas coast, Gulf of Tehuantepec, Mexico during August 2014 – January 2015. Average Hg concentrations in neonates and juveniles (all values in μg g−1 w.w.) were found to be 0.115 and 0.129 respectively, below the maximum permissible limit of 1 μg g−1 set by the Mexican government. However, excess Se values (all values in μg g−1 d.w.) observed in neonates (5.366) and juveniles (2.815) prove to maintain antioxidant ability by inducing Hg excretion and reducing its toxicity. Calculated Biomagnification Factor (BMFTL) denoted high values for the prey C.hippurus, signifying absolute magnification of Hg and Se along the food chain. This study provides key toxicological evidences of Hg- Se interaction and their effects in marine systems and human health.",

author = "Juanita Rodr{\'i}guez-Guti{\'e}rrez and Felipe Galv{\'a}n-Maga{\~n}a and Tania Jacobo-Estrada and Laura Arreola-Mendoza and Sujitha, {S. B.} and Jonathan, {M. P.}",

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language = "American English",

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Mercury–selenium concentrations in silky sharks (Carcharhinus falciformis) and their toxicological concerns in the southern Mexican Pacific. / Rodríguez-Gutiérrez, Juanita; Galván-Magaña, Felipe ; Jacobo-Estrada, Tania ; Arreola-Mendoza, Laura; Sujitha, S. B.; Jonathan, M. P.

In: Marine Pollution Bulletin, 01.04.2020.

Research output: Contribution to journal › Article › peer-review

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T1 - Mercury–selenium concentrations in silky sharks (Carcharhinus falciformis) and their toxicological concerns in the southern Mexican Pacific

AU - Rodríguez-Gutiérrez, Juanita

AU - Galván-Magaña, Felipe

AU - Jacobo-Estrada, Tania

AU - Arreola-Mendoza, Laura

AU - Sujitha, S. B.

AU - Jonathan, M. P.

PY - 2020/4/1

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N2 - © 2020 Mercury- Selenium concentrations were determined in 136 samples of Carcharhinus falciformis (Silky shark) sampled from the Chiapas coast, Gulf of Tehuantepec, Mexico during August 2014 – January 2015. Average Hg concentrations in neonates and juveniles (all values in μg g−1 w.w.) were found to be 0.115 and 0.129 respectively, below the maximum permissible limit of 1 μg g−1 set by the Mexican government. However, excess Se values (all values in μg g−1 d.w.) observed in neonates (5.366) and juveniles (2.815) prove to maintain antioxidant ability by inducing Hg excretion and reducing its toxicity. Calculated Biomagnification Factor (BMFTL) denoted high values for the prey C.hippurus, signifying absolute magnification of Hg and Se along the food chain. This study provides key toxicological evidences of Hg- Se interaction and their effects in marine systems and human health.

AB - © 2020 Mercury- Selenium concentrations were determined in 136 samples of Carcharhinus falciformis (Silky shark) sampled from the Chiapas coast, Gulf of Tehuantepec, Mexico during August 2014 – January 2015. Average Hg concentrations in neonates and juveniles (all values in μg g−1 w.w.) were found to be 0.115 and 0.129 respectively, below the maximum permissible limit of 1 μg g−1 set by the Mexican government. However, excess Se values (all values in μg g−1 d.w.) observed in neonates (5.366) and juveniles (2.815) prove to maintain antioxidant ability by inducing Hg excretion and reducing its toxicity. Calculated Biomagnification Factor (BMFTL) denoted high values for the prey C.hippurus, signifying absolute magnification of Hg and Se along the food chain. This study provides key toxicological evidences of Hg- Se interaction and their effects in marine systems and human health.

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