The
health of freshwater ecosystems and their biota exposed to continuous
detrimental effects of environmental contaminants can be better assessed by
integrating analytical chemical analysis with carefully selected biological
endpoints measured in tissues of species of concern. These biological endpoints
include molecular, biochemical and physiological markers (i.e. biomarkers) that
when integrated, can clarify issues of contaminant bioavailability,
bioaccumulation and ecological effects while enabling a better understanding of
the effects of non-chemical stressors. Here, a battery of biomarkers, devised to measure
cellular damage, antioxidant enzyme activity and physiological impairment, were
combined with chemical analysis of water column, sediment and tissue, to
determine exposure to and the effects of pollution at sites within Sitnica
River (Kosovo). Carp fish, Cyprinus
carpio, collected in situ through
electrofishing were used as test species to determine the possible alterations
in biochemical and physiological biomarkers. Our results confirmed a
significant increase of hepatic alanine
transaminase (ALT), aspartate transaminase (AST), glutathione-S-transferase
(GST), catalase (CAT) and superoxide-dismutase (SOD) in blood. Both, blood
glucose (GLU) and cortisol concentration were also significantly increased.
Alteration in liver histological structure, increased in the frequency of
micronuclei (MN) and nuclear abnormalities (ENA) in erythrocytes, were the most
discriminating biomarkers among sites. This holistic approach to environmental assessment is encouraged as it
helps to identify the integrated impact of chemical contamination on organisms
and to provide a realistic measure of environmental quality.
Primary Language | English |
---|---|
Journal Section | Articles |
Authors | |
Publication Date | June 30, 2018 |
Acceptance Date | June 28, 2018 |
Published in Issue | Year 2018 Volume: 13 Issue: 2 |
“Journal of International Environmental Application and Science”