TY - JOUR
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.
N1 - Publisher Copyright:
© 2020
PY - 2020/4
Y1 - 2020/4
N2 - 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 - 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.
KW - Biomagnification
KW - Carcharhinus falciformis
KW - Mercury
KW - Mexican Pacific coast
KW - Neonates and juveniles
KW - Selenium
UR - http://www.scopus.com/inward/record.url?scp=85080042771&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2020.111011
DO - 10.1016/j.marpolbul.2020.111011
M3 - Artículo
C2 - 32275557
SN - 0025-326X
VL - 153
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
M1 - 111011
ER -