Biomarcadores Histológicos Em Brânquias De Peixes Na Avaliação Da Contaminação Ambiental Do Rio Mearim, Nordeste Brasileiro / Histological Biomarkers in Fish Gills in the Assessment of Environmental Contamination of the Mearim River, Northeastern Brazil

Abstract

Biomarcadores histológicos em brânquias de peixes na avaliação da contaminação ambiental do Rio Mearim, Nordeste brasileiro Histological biomarkers in fish gills in the assessment of environmental contamination of the Mearim river, Northeastern Brazil

Impacted estuaries on the Brazilian Amazon coast near port regions influence histological and enzymatic changes in Sciades herzbergii (Ariidae, Bloch, 1794)

“…According to Soares et al (2020) identified lamellar fusion and epithelial displacement in the tissues of S. herzbergii sampled in São Marcos Bay. Lamellar fusion is a type of injury that occurs as a defense mechanism against direct contact between contaminants and the lamellar epithelium; however, these changes also reduce the respiratory surface, which may result in death (Pereira et al, 2020). According to Pereira et al (2020), epithelial displacement is one of the most common biomarkers observed in the gills of fish exposed to acute toxicity.…”

“…Lamellar fusion is a type of injury that occurs as a defense mechanism against direct contact between contaminants and the lamellar epithelium; however, these changes also reduce the respiratory surface, which may result in death (Pereira et al, 2020). According to Pereira et al (2020), epithelial displacement is one of the most common biomarkers observed in the gills of fish exposed to acute toxicity. The authors argued that fusion of secondary lamellae is also frequently found in organisms affected by contaminants.…”