{
  "abstract": "In this study, an integrated chemical and biomarker approach was applied using the mangrove crab Ucides cordatus to assess trace element contamination and its biological impacts across two distinct Amazonian estuaries. Crabs were collected from São José Bay (A1-minimally impacted) and São Marcos Bay (A2-impacted by port activities) on the Amazon coast of Brazil. Simultaneously with crab sampling, physicochemical parameters and trace element levels in sediment and water samples were assessed. Biometric measurements included cephalothorax length and width, cheliped propodus length and width, movable finger length and width, and total weight. Two biomarkers, genotoxic responses (micronuclei) and histopathological lesions (gills and liver hepatopancreas), were measured. Abiotic parameters, such as pH, dissolved oxygen, and salinity, were similar between the two study areas (A1 and A2). However, the concentrations of trace elements (Zn, Fe, Al, and Mn) in the water were increased in A2. Biometric data revealed that crabs from A2 were significantly smaller and lighter (p < 0.05) than those from A1. Gill lesions (marginal canal deformation, pillar cell rupture, and necrosis) were frequently observed in crabs from both sites, with a higher prevalence in A2. Hepatopancreas histological alterations (e.g., necrosis) were significantly more common in crabs from A2 (p < 0.05). Genotoxic responses, such as pycnotic nuclei, were also significantly more frequent in A2 (p < 0.05). The results demonstrate that Ucides cordatus effectively reflects environmental contamination through measurable histological and genotoxic biomarkers, which is consistent with the chemical evidence of trace element pollution in estuarine environments.",
  "abstract_shown": true,
  "affiliations": [
    "Postgraduate Program in Biodiversity and Biotechnology (REDE BIONORTE), State University of Maranhão, São Luís, MA, CEP 65055-310, Brazil. lucianaoliveira@proinfra.uema.br.",
    "Postgraduate Program in Ecology and Biodiversity Conservation, State University of Maranhão, Paulo VI Campus, São Luís, MA, CEP 65055-970, Brazil.",
    "Postgraduate Program in Biodiversity and Biotechnology (REDE BIONORTE), State University of Maranhão, São Luís, MA, CEP 65055-310, Brazil.",
    "Department of Veterinary Medicine, Federal University of Viçosa, Viçosa, MG, CEP 36570-000, Brazil.",
    "Coordination of the Environmental Engineering Program, Federal University of Maranhão, Balsas, MA, CEP 65800-000, Brazil.",
    "Department of Fisheries Engineering, Federal University of Maranhão, Pinheiro, MA, CEP 65200-000, Brazil.",
    "Postgraduate Program in Agriculture and Environment, State University of Maranhão, Paulo VI Campus, São Luís, MA, CEP 65055-970, Brazil.",
    "Departmen of Biology, State University of Maranhão, Paulo VI Campus, São Luís, MA, CEP 65055-970, Brazil."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 16,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Luciana Barros Oliveira",
      "orcid": "0000-0001-6629-584X"
    },
    {
      "affs": [
        1
      ],
      "name": "Lina Clara Gayoso E Almendra Ibiapina Moreno"
    },
    {
      "affs": [
        2
      ],
      "name": "Suelen Rosana Sampaio de Oliveira"
    },
    {
      "affs": [
        3
      ],
      "name": "Laércio Dos Anjos Benjamin"
    },
    {
      "affs": [
        4
      ],
      "name": "Débora Batista Pinheiro-Sousa"
    },
    {
      "affs": [
        2
      ],
      "name": "Gerson Dos Santos Protázio",
      "orcid": "0000-0003-0555-0493"
    },
    {
      "affs": [
        2
      ],
      "name": "Alana Lislea de Sousa"
    },
    {
      "affs": [
        2
      ],
      "name": "Thales Passos Andrade"
    },
    {
      "affs": [
        2
      ],
      "name": "Eliane Braga Ribeiro"
    },
    {
      "affs": [
        5
      ],
      "name": "Jonatas da Silva Castro"
    },
    {
      "affs": [
        2
      ],
      "name": "Gustavo Henrique Rodrigues Vale de Macedo"
    },
    {
      "affs": [
        6
      ],
      "name": "Luan Jonatas da Silva Ferreira"
    },
    {
      "affs": [
        7
      ],
      "name": "Verônica Maria Oliveira"
    },
    {
      "affs": [
        7
      ],
      "name": "Débora Martins Silva Santos"
    },
    {
      "affs": [
        7
      ],
      "name": "Sandra Fernanda Loureiro de Castro Nunes"
    },
    {
      "affs": [
        7
      ],
      "name": "Raimunda Nonata Fortes Carvalho Neta"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/356krq6sp4e99.bib",
  "cited_by": 0,
  "doi": "10.1007/s10661-026-16077-4",
  "fulltext_url": "https://europepmc.org/articles/PMC13687237",
  "id": "356krq6sp4e99",
  "issns": [
    "0167-6369",
    "1573-2959"
  ],
  "landing_url": "https://europepmc.org/article/MED/42905225",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2307|Environmental Toxicology and Ecotoxicology"
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  "openalex": "W7223098774",
  "pdf_url": "https://europepmc.org/articles/PMC13687237?pdf=render",
  "pmcid": "PMC13687237",
  "pmid": "42905225",
  "published": "2026-10-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/356krq6sp4e99.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:53Z",
      "native_id": "MED:42905225",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42905225"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2307|Environmental Toxicology and Ecotoxicology",
      "subfield": "pharmacology-toxicology"
    }
  ],
  "title": "An integrated chemical and biomarker approach using Ucides cordatus (Crustacea; Decapoda) to assess trace element contamination and its biological impacts across two Amazonian estuaries.",
  "title_text": "An integrated chemical and biomarker approach using Ucides cordatus (Crustacea; Decapoda) to assess trace element contamination and its biological impacts across two Amazonian estuaries.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:53Z",
  "url": "https://research.draconitic.com/paper/356krq6sp4e99",
  "venue": "Environmental monitoring and assessment",
  "versions": []
}