TY - JOUR
T1 - Mercury and selenium in muscle and target organs of scalloped hammerhead Sharks sphyrna lewini of the se gulf of California
T2 - Dietary intake, molar ratios, loads, and human health risks
AU - Bergés-Tiznado, Magdalena E.
AU - Márquez-Farías, Fernando
AU - Lara-Mendoza, Raúl E.
AU - Torres-Rojas, Yassir E.
AU - Galván-Magaña, Felipe
AU - Bojórquez-Leyva, Humberto
AU - Páez-Osuna, Federico
N1 - Publisher Copyright:
© 2015 Springer Science+Business Media New York.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - Selenium and mercury were evaluated in muscle, liver, kidney, brain, and the stomach contents of juvenile scalloped hammerhead shark Sphyrna lewini. Se:Hg molar ratios were calculated. The average Hg levels in muscle ranged from 0.12 to 1.17 μg/g (wet weight); Hg was < 0.39 μg/g in liver and kidneys and < 0.19 μg/g in brain. The lowest value of Se was found in muscle (0.4 μg/g) and the highest in kidney (26.7 μg/g). An excess of Se over Hg was found, with Se:Hg molar ratios > 1. Correlations were found for Hg in muscle with size, age, and weight, and also for Hg in liver with size, age, and weight. Hg in muscle was significantly positive correlated to Hg in brain as well as Hg in liver was correlated to Hg in kidney. The highest Hg in preys was for carangid fishes; scombrid and carangid fishes contributed with the highest Se levels. Results suggest that more than 98 % of the total Hg and 62 % of Se end up in muscle and might be affected by factors, such as geographical area, age, size, and feeding habits. The muscle of S. lewini should be consumed by people cautiously so as not to exceed the recommended intake per week.
AB - Selenium and mercury were evaluated in muscle, liver, kidney, brain, and the stomach contents of juvenile scalloped hammerhead shark Sphyrna lewini. Se:Hg molar ratios were calculated. The average Hg levels in muscle ranged from 0.12 to 1.17 μg/g (wet weight); Hg was < 0.39 μg/g in liver and kidneys and < 0.19 μg/g in brain. The lowest value of Se was found in muscle (0.4 μg/g) and the highest in kidney (26.7 μg/g). An excess of Se over Hg was found, with Se:Hg molar ratios > 1. Correlations were found for Hg in muscle with size, age, and weight, and also for Hg in liver with size, age, and weight. Hg in muscle was significantly positive correlated to Hg in brain as well as Hg in liver was correlated to Hg in kidney. The highest Hg in preys was for carangid fishes; scombrid and carangid fishes contributed with the highest Se levels. Results suggest that more than 98 % of the total Hg and 62 % of Se end up in muscle and might be affected by factors, such as geographical area, age, size, and feeding habits. The muscle of S. lewini should be consumed by people cautiously so as not to exceed the recommended intake per week.
UR - http://www.scopus.com/inward/record.url?scp=84974795000&partnerID=8YFLogxK
U2 - 10.1007/s00244-015-0226-8
DO - 10.1007/s00244-015-0226-8
M3 - Artículo
SN - 0090-4341
VL - 69
SP - 440
EP - 452
JO - Archives of Environmental Contamination and Toxicology
JF - Archives of Environmental Contamination and Toxicology
IS - 4
ER -