An assessment of acute biomarker responses in the demersal catfish Cathorops spixii after the Vicuña oil spill in a harbour estuarine area in Southern Brazil
| Autor: | M. D. da Silva, C.A. Oliveira Ribeiro, Alberto Katsumiti, M. Azevedo, Marta Margarete Cestari, H.C. Silva de Assis, Carolina A. Freire, F. X. Valdez Domingos, Marco Antonio Ferreira Randi, Marina Isabel Mateus de Almeida, R. C. Damian |
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| Rok vydání: | 2007 |
| Předmět: |
Gills
Management Monitoring Policy and Law Demersal zone chemistry.chemical_compound Plasma Animals Humans Seawater Cathorops Catfishes Ships General Environmental Science geography geography.geographical_feature_category Micronucleus Tests biology Ecology Estuary General Medicine Environmental exposure Environmental Exposure biology.organism_classification Pollution Hydrocarbons Fishery Petroleum chemistry Liver Accidents Environmental science Comet Assay Bioindicator Bay Biomarkers Brazil Water Pollutants Chemical Catfish Environmental Monitoring |
| Zdroj: | Environmental monitoring and assessment. 152(1-4) |
| ISSN: | 1573-2959 |
| Popis: | The Vicuna oil tanker exploded in Paranagua Bay (South of Brazil), during methanol unloading operations in front of Paranagua Harbour, on November 15th, 2004, releasing a large amount of bunker oil and methanol. Two weeks after the accident, the acute effects of the Vicuna Oil Spill (VOS) were evaluated in the demersal catfish Cathorops spixii, comparing a contaminated (at the spill site) and a reference site inside the Bay. Data were compared to previous measurements, taken before the accident, in the same species, from the same sites. The physiological biomarkers were the ones that best reflected acute effects of the spill: plasma osmolality, chloride, calcium, magnesium, and potassium. Morphological (liver and gill histopathology) and genetic (piscine micronucleus and DNA strand breaks) biomarkers revealed that damage was already present in fishes from both reference and contaminated sites inside the Bay. Thus, the reference site is not devoid of contamination, as water circulation tends to spread the contaminants released into other areas of the Bay. Acute field surveys of oil spill effects in harbour areas with a long history of contamination should thus be viewed with caution, and whenever possible previous evaluations should be considered for proper appraisal of biomarker sensitivity, especially in mobile bioindicators such as fish. |
| Databáze: | OpenAIRE |
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