Bioaccumulation of trace metals in farmed pacific oysters Crassostrea gigas from SW Gulf of California coast, Mexico

M. P. Jonathan, N. P. Muñoz-Sevilla, Andrés Martin Góngora-Gómez, Raquel Gabriela Luna Varela, S. B. Sujitha, D. C. Escobedo-Urías, P. F. Rodríguez-Espinosa, Lorena Elizabeth Campos Villegas

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The aim of the study was to evaluate the bioavailability of trace metals (Chromium, Copper, Nickel, Lead, Zinc, Cadmium, Arsenic, and Mercury) in the commercially consumed Crassostrea gigas oysters collected over a 12-month growth period (2011–12) from an experimental cultivation farm in La Pitahaya, Sinaloa State, Mexico. Sediment and water samples were also collected from four different zones adjacent to the cultivation area to identify the concentration patterns of metals. The results revealed that sewage disposals, fertilizers used for agricultural practices and shrimp culture are the major sources for the enrichment of certain toxic metals. The metal concentrations in oysters presented a decreasing order of abundance (all values in mg Kg−1): Zn (278.91 ± 93.03) > Cu (63.13 ± 31.72) > Cr (22.29 ± 30.23) > Cd (14.54 ± 4.28) > Ni (9.41 ± 11.33) > Pb (2.22 ± 1.33) > As (0.58 ± 0.91) > Hg (0.04 ± 0.06). Bioconcentration Factor (BCF) and Biota Sediment Accumulation Factor (BSAF) exhibited that C. gigas in the region are strong accumulators for Zn and Cd respectively. Thus, the present study proves to fulfill the gap in understanding the rate of bioaccumulation of metals in C. gigas which is regarded as the most sought after oyster species globally.

Original languageEnglish
Pages (from-to)311-319
Number of pages9
JournalChemosphere
Volume187
DOIs
StatePublished - 1 Jan 2017

Keywords

  • Bioaccumulation
  • Crassostrea gigas
  • Cultivated oysters
  • Metals
  • Mexico
  • Toxicity

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