Addressing the impact of mercury estuarine contamination in the European eel (Anguilla anguilla L., 1758) – An early diagnosis in glass eel stage based on erythrocytic nuclear morphology
| Autor: | Eduarda Pereira, C.L. Mieiro, Ana Marques, Armando C. Duarte, Sofia Guilherme, D. Castro, Maria Ana Santos, João P. Coelho, Mário Pacheco |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Erythrocytes Population Zoology chemistry.chemical_element 010501 environmental sciences Aquatic Science Biology Oceanography medicine.disease_cause 01 natural sciences 03 medical and health sciences medicine Animals education 0105 earth and related environmental sciences Cell Nucleus education.field_of_study geography geography.geographical_feature_category Portugal Muscles Estuary Environmental Exposure Mercury Environmental exposure Contamination Anguilla Pollution Mercury (element) 030104 developmental biology chemistry Bioaccumulation Body Burden Erythropoiesis Estuaries Water Pollutants Chemical Genotoxicity DNA Damage Environmental Monitoring |
| Zdroj: | Marine Pollution Bulletin. 127:733-742 |
| ISSN: | 0025-326X |
| Popis: | The decline of the European eel (Anguilla anguilla L., 1758) population throughout Europe has been partially attributed to pollution. As glass eel estuarine migration may represent a considerable threat, the impact of mercury (Hg) contamination at this stage was evaluated through an in situ experiment (7days). Total Hg (tHg) bioaccumulation was evaluated concomitantly with erythrocytic nuclear morphology alterations: erythrocytic nuclear abnormalities assay (ENA), frequency of immature erythrocytes (IE) and the erythrocytic maturity index (EMI). The ENA results suggested a genotoxic pressure at the most contaminated sites, in line with the tHg increase. The EMI data, together with IE frequency, showed that fish exposed to high levels of Hg exhibited alterations of haematological dynamics, translated into an erythropoiesis increment. Despite the presence of these compensatory mechanisms, the present findings suggest a harmful impact of Hg on genome integrity at this early development stage, potentially affecting eels' condition and ultimately the population sustainability. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect