Journal
ENVIRONMENTAL MONITORING AND ASSESSMENT
Volume 192, Issue 8, Pages -Publisher
SPRINGER
DOI: 10.1007/s10661-020-08515-8
Keywords
Bioaccumulation; Histopathology; Metallic ions; Teleosts; Water contamination
Categories
Funding
- Conselho Nacional de Pesquisas [CNPq-306946/2016-5, 407719/2016-4]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]
- Fundacao de Amparo a Pesquisa no Estado de Minas Gerais [FAPEMIG-CVZ-APQ03232-15]
Ask authors/readers for more resources
Due to industrial, rural, and domestic waste disposal, heavy metals such as cadmium (Cd), chromium (Cr), lead (Pb), zinc (Zn), copper (Cu), and iron (Fe) continually infiltrate aquatic environments. These pollutants do not degrade naturally and, thus, have a high capacity for bioaccumulation in tissues and organs. The present study uses histological and immunohistochemical analyses to evaluate the contamination status ofSalminus franciscanus, a large and economically important fish. Levels of Cd, Cr, Pb, Zn, Cu, and Fe were evaluated by atomic absorption spectrometry in the liver and muscle of fish sampled from two tributaries of the upper Sao Francisco River Basin, Brazil: the Abaete and Paraopeba Rivers. In addition, histopathological alterations and expressions of three environmental biomarkers were assessed: metallothionein (MT), heat shock protein-70 (HSP70), and cytochrome P450-1A (CYP1A). The results show that fish from the Paraopeba River are unsuitable for human consumption, with several metals being detected above the safe limits established by the World Health Organization. Histopathological alterations in the liver and spleen were also significantly more frequent in fish from the Paraopeba River than in those from the Abaete River (P < 0.05). Significant differences in the expressions of environmental biomarkers were observed between the rivers. Fish from the Abaete River presented significantly higher values of the gonadosomatic index (GSI) and lower levels of metal contamination in the liver and muscle.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available