title: Mercury and selenium bioaccumulation in the smooth hammerhead shark, Sphyrna zygaena Linnaeus, from the Mexican Pacific Ocean.
abstract: We analyzed total mercury and selenium bioaccumulation in muscle tissue and cartilage fibers (fins) from smooth hammerhead shark, Sphyrna zygaena, caught off Baja California Sur, Mexico. In muscle tissue, the mercury concentration ranged from 0.005 to 1.93 microg g(-1) ww (wet weight), which falls within the safety limits for food set by international agencies (Hg > 1.0 microg g(-1) ww). Only one specimen showed a mercury value that exceeded this limit. In fins, the mercury bioaccumulation was lower (<0.05). Selenium in muscle ranged from 0.11 to 1.63 microg g(-1) ww, while in fins it ranged from 0.13 to 0.56 microg g(-1) ww.
authors.affiliation: Laboratorio de Ecología de Peces, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), 23096 La Paz, Baja California Sur, Mexico. escobars.ofelia@gmail.com
authors.forename: O
authors.initials: O
authors.lastname: Escobar-Sánchez
authors.forename: F
authors.initials: F
authors.lastname: Galván-Magaña
authors.forename: R
authors.initials: R
authors.lastname: Rosíles-Martínez
mesh_terms: D000818:Animals; D049628:Body Size; D005260:Female; D008297:Male; D008628:Mercury / Q000032:analysis / Q000378:metabolism*; D008800:Mexico; D018482:Muscle, Skeletal / Q000737:chemistry / Q000378:metabolism; D010140:Pacific Ocean; D012643:Selenium / Q000032:analysis / Q000378:metabolism*; D012737:Sex Factors; D012754:Sharks / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D014874:Water Pollutants, Chemical; D008628:Mercury; D012643:Selenium