Mercury and selenium in tissues and stomach contents of the migratory sailfish, Istiophorus platypterus, from the Eastern Pacific: Concentration, biomagnification, and dietary intake.
Mercury and selenium were assessed in the sailfish, Istiophorus platypterus, from the Eastern Pacific. Sixty-seven individuals were sampled, muscle, liver, kidney, gonads and the prey found in the stomach contents were isolated during fishing 2011-2013 tournaments. Hg exhibited the following pattern (μg g(-1) wet weight): liver (0.57 ± 0.07)>muscle (0.56 ± 0.04)>kidney (0.44 ± 0.08)>gonad (0.14 ± 0.01). The maximum concentration of Se was found in kidneys (14.1 ± 1.9 μg g(-1)), and the minimum in muscles (0.67 ± 0.03 μg g(-1)). High Se:Hg ratios were found for muscle (4.1 ± 0.3), kidney (132.4 ± 12.1), liver (54.0 ± 4.4) and gonads (88.2 ± 7.9); Hg:Se molar ratios were several orders of magnitude lower (muscle<0.4 and liver, kidney and gonad<0.03). Sailfish feed mainly on fishes and cephalopods with low Hg levels (<0.13 μg g(-1)), these results indicate biomagnification of Hg and Se. The muscle of I. platypterus should be consumed (according the provisional tolerable weekly intake) by people cautiously so as not to exceed the recommended intake of 215 g per week.
Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, P.O. Box 811, C.P. 82000 Mazatlán, Sinaloa, Mexico.
Magdalena E
ME
Bergés-Tiznado
Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen S/N Col. Los Pinos, C.P. 82000 Mazatlán, Sinaloa, Mexico.
J
J
Fernando Márquez-Farías
Instituto de Ecología, Pesquerías y Oceanografía del Golfo de México, Universidad Autónoma de Campeche (EPOMEX-UAC), Campus 6. Av. Héroe de Nacozari #480, C.P. 24029 Campeche, Campeche, Mexico.
Yassir
Y
Torres-Rojas
Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN S/N Col. Playa de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico.
Felipe
F
Galván-Magaña
Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, C.P. 82000 Mazatlán, Sinaloa, Mexico; Miembro de El Colegio de Sinaloa, Antonio Rosales 435 Pte, Culiacán, Sinaloa, Mexico. Electronic address: paezos@ola.icmyl.unam.mx.
Federico
F
Páez-Osuna
D000818:Animals; D004435:Eating; D004784:Environmental Monitoring; D020387:Food Chain; D005766:Gastrointestinal Contents / Q000737:chemistry*; D006801:Humans; D008099:Liver / Q000737:chemistry; D008628:Mercury / Q000032:analysis* / Q000493:pharmacokinetics; D009132:Muscles / Q000737:chemistry; D010140:Pacific Ocean; D010473:Perciformes / Q000378:metabolism*; D017747:Seafood / Q000592:standards; D012643:Selenium / Q000032:analysis* / Q000493:pharmacokinetics; D014018:Tissue Distribution; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000493:pharmacokinetics
D014874:Water Pollutants, Chemical; D008628:Mercury; D012643:Selenium
Biomagnification; Diet composition; Gulf of California; Istiophorus platypterus; Mercury; Selenium