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Advisor(s)
Abstract(s)
The histopathological changes are among the most recognized responses to environmental
stressors, namely heavy metals. Liza saliens were sampled, in the Portuguese Esmoriz-Paramos coastal
lagoon to assess their gill histopathological response to Cu and Zn contaminated sediments. A lesion
prevalence index, severity, and extension scores of each lesion, as well as an assessment value (severity
extension), were determined to evaluate the effect of environmental heavy metal exposure. The main
histopathological changes observed were aneurisms, hyperplasia, lifting, and vasodilation. A high prevalence
for each lesion (65–85%) was found, in addition to a high number of simultaneous lesions. Vasodilation
and hyperplasia were the lesions that showed higher prevalence indexes. Lifting, followed by hyperplasia,
were the lesions with highest assessment value. The prevalence of the number of the lesions found
in L. saliens collected from the Esmoriz-Paramos lagoon was high when compared with mullet caught in
the sea. A previous work revealed that fish collected in the lagoon showed elevated Cu and Zn levels in
their gills, in a positive correlation with age. However, no positive correlation was observed between
assessment value and gill metal levels.
Description
Keywords
histopathological changes gill metals Liza saliens
Citation
Fernandes, Conceição; Fontaínhas-Fernandes, António; Monteiro, Sandra Mariza; Salgado, Maria Antónia (2007). Histopathological gill changes in wild leaping grey mullet (Liza saliens) from the Esmoriz-Paramos coastal lagoon, Portugal. Environmental Toxicology. ISSN 1520-4081. 22:4, p. 443-448
Publisher
Wiley Periodicals