Total Mercury in Liver and Muscle Tissue of Two Coastal Sharks from the Northwest of Mexico
Total mercury (THg) in liver and muscle of three costal sharks from Mexico were evaluated. The highest concentrations of THg in muscle tissue of juveniles were found in Sphyrna lewini (0.82 ± 0.33 mg kg−1 wet basis). Rhizoprionodon longurio adults had the highest concentrations (0.92 ± 1.03 mg kg−1). THg concentrations in liver were low compared to those found in muscle tissue; higher levels were found in liver of juvenile S. lewini (0.250 ± 0.07 mg kg−1). Results showed that 35 % of muscle tissue samples are above the precautionary limit (0.50 mg kg−1 of THg) and a 7 % exceeded the maximum limit for human consumption (1 mg kg−1).
KeywordsTotal mercury Toxicity Elasmobranchs Fisheries
We express our sincere appreciation to the National Council of Science and Technology (CONACyT) for the support granted to carry out this research.
- Adams DH, McMichael RH, Henderson GE (2003) Mercury levels in marine and estuarine fishes of Florida 1989–2001. In: Florida Marine Research Institute Technical Report TR-9. 2nd ed. rev. 57 ppGoogle Scholar
- Bizzarro JJ, Smith WD, Castillo-Géniz JL, Ocampo-Torres A, Márquez-Farías JF, Hueter RE (2009) The importance of small coastal sharks (Elasmobranchii, Carcharhiniformes) in the artisanal elasmobranch fishery of Sinaloa, Mexico. Panam J Aquat Sci 4:513–531Google Scholar
- EPA (Environmental Protection Agency) (2000) Guidance for assessing chemical contaminant data for use in fish advisories, Volume 1: Fish sampling and analysisGoogle Scholar
- Evers DC, Hammerschlag N, Die D (2008) Mercury levels in Florida sharks: Interim Report. In: BioDiversity Research Institute, Gorham, Maine. Report BRI 2008-02:1-16Google Scholar
- Gomez FA, Vieira FV, Veiga CC, Teixeira LR, Santana SF (2004) Total mercury in the night shark, Carcharhinus signatus in the western equatorial atlantic ocean. Braz Arch Biol Technol 47:629–634Google Scholar
- Márquez-Farías JF. (2002) The artisanal ray fishery in the Gulf of California: Development, Fisheries Research and Management Issues. Shark News 14, JulyGoogle Scholar
- Moore JC. (2000). A review of mercury in the environment (its occurrence in marine fish). Office of Environmental ManagementGoogle Scholar
- NOM (Norma Oficial Mexicana). (1993). NOM-027-SSA1-1993. Bienes y Servicios. Productosde la pesca. Pescados frescos-refrigerados y congelados. Especificaciones sanitariasGoogle Scholar
- WHO (1995) Methylmercury. In: Enviromental Health Criteria. World Health Organization, GinebraGoogle Scholar