4.7 Article

Trace elements in the silky shark Carcharhinus falciformis in the Central Pacific Mexican Shelf

期刊

MARINE POLLUTION BULLETIN
卷 185, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2022.114263

关键词

Mercury; Cadmium; Copper; Elasmobranch; Bioconcentration; Health risk

资金

  1. Direccion General de Asuntos del Personal Academico
  2. Programa de Apoyo a Proyectos de Investigacion e Innovacion Tecnologica
  3. Universidad Nacional Autonoma de Mexico (DGAPA-PAPIIT-UNAM) [IN203922]
  4. Instituto Politecnico Nacional (IPN) [SIP 20181382]

向作者/读者索取更多资源

In this study, concentrations of important heavy metals (mercury, cadmium, and copper) were examined in different tissues of silky shark caught in the Central Pacific Mexican Shelf. Liver tissue showed the highest concentrations of cadmium and copper. Maturation stages influenced the concentrations of elements in liver tissue, with immature organisms having lower levels. There were no significant differences between sexes, except for higher copper concentrations in the muscle of adult females. Some samples exceeded the Mexican Legislation limits, posing a potential risk to human health if consumed regularly.
Mercury (Hg), cadmium (Cd) and copper (Cu) concentrations were determined in muscle, liver and fin of the silky shark (Carcharhinus falciformis) caught in the Central Pacific Mexican Shelf. Liver tissue presented the highest concentrations of Cd (2.83 mu g g(-1 )wet weight (ww)) and Cu (2.34 mu g g-1 ww). For muscle and fin, Cu presented the highest concentrations (0.97 and 1.80 mu g g(-1) ww, respectively). Liver concentrations were influenced by the maturation stages for the three elements. Immature organisms exhibited lower trace element concentrations than adults. No significant differences were found between sexes, except for Cu concentrations in muscle, where adult females present higher levels than adult males. One muscle sample (2.3 %) exceeded the Mexican Legislation for Hg (1.0 mu g g(-1) ww) and five muscles samples (11.6 %) exceeded the Mexican limit for Cd (0.5 mu g g(-1) ww). Meat consumption of this species can be a risk to human health if it is ingested regularly.

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