Mercury and Selenium Bioaccumulation in the Smooth Hammerhead Shark, Sphyrna zygaena Linnaeus, from the Mexican Pacific Ocean |
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Authors: | O Escobar-Sánchez F Galván-Magaña R Rosíles-Martínez |
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Institution: | 1. Laboratorio de Ecología de Peces, Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), Ave. IPN s/n, P. O. Box 592, 23096, La Paz, Baja California Sur, Mexico 2. Facultad de Medicina Veterinaria y Zootecnia, Laboratorio de Toxicología, Departamento de Nutrición y Bioquímica, Universidad Nacional Autónoma de México, 04510, Mexico, D. F., Mexico
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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 μg g−1 ww (wet weight), which falls within the safety limits for food set by international agencies (Hg > 1.0 μg 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 μg g−1 ww, while in fins it ranged from 0.13 to 0.56 μg g−1 ww. |
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