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Biochemical and Histological Biomarkers in Crassostrea sp. (Bivalvia, Ostreidae) for Environmental Monitoring of a Neotropical Estuarine Area (São José Bay, Northeastern Brazil)

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Abstract

This study aimed to compare biochemical and histological biomarkers in oysters to identify impacted areas in a Brazilian port region. Oysters belonging to the Crassostrea genus were collected in two points in São José Bay (Brazil): (A1) Curupu Island (control area) and (A2) Braga Port (impacted area). Digestive glands from oysters were used to analyze the enzymatic activity of glutathione S-transferase and Catalase. The gills were used for standard histology analyses. Water samples were collected for metal analyses. Our results indicated that there was a change in the activity of oyster GST and CAT enzymes, especially in A2. Histological gill analysis indicated more frequent changes in A2. The analyzed metals presented higher values in A2. The results of this study suggest that enzymatic alterations, histological changes and higher metal values are indicative of initial stress caused by contaminants in São José Bay, especially in the port region.

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Acknowledgements

The authors are grateful to the Biology and Aquatic Environment Study Group (BIOAqua/UEMA), the Aquatic Organism Biomarker Laboratory (LABOAQ/UEMA), the Animal Morphology Laboratory, the Fishing and Aquatic Ecology Laboratory (LABPEA/UEMA), the Soil Chemistry Laboratory (UEMA), the UEMA (Veterinary Medicine Department) Food and Water Microbiology Laboratory and the Oceanography Department of the Universidade Federal do Maranhão (DEOLI/UFMA) for assistance with the laboratory analyzes. We are also thank ful to the Brazilian agencies CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Finance Code 001) and FAPEMA (Fundação de Pesquisa e Desenvolvimento Científico do Maranhão) for financial support.

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Correspondence to Katherine Saldanha Noleto or Suelen Rosana Sampaio de Oliveira.

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Noleto, K.S., de Oliveira, S.R.S., Lima, I.M.A. et al. Biochemical and Histological Biomarkers in Crassostrea sp. (Bivalvia, Ostreidae) for Environmental Monitoring of a Neotropical Estuarine Area (São José Bay, Northeastern Brazil). Bull Environ Contam Toxicol 106, 614–621 (2021). https://doi.org/10.1007/s00128-021-03149-z

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  • DOI: https://doi.org/10.1007/s00128-021-03149-z

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