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Background: As a result of the rapid expansion of anthropogenic activities, particularly in the aquatic ecosystem, environmental pollution has escalated in recent decades. Under a variety of harsh environmental conditions, marine creatures can be subject to oxidative stress, which causes changes in metabolic components that can be measured to determine the health status of the organism.

The goal of this study is to monitor the effect of Naphthalene on bivalve mussels and to use a large number of biomakers to uncover distinct and distinctive patterns. In order to comprehend the changes in marker enzymes in P. viridis haemolymph, gill, and digestive gland, the green mussels Perna viridis were subjected to naphthalene.

Green mussels were exposed to naphthalene for 28 days in order to examine biomarker alterations. Acid phosphatase (ACP) and alkaline phosphatase (ALP), alanine transaminase (ALT), and aspartate transaminase activity (AST) were measured in mussels P. viridis haemolymph, gill, and digestive gland. After 28 days of naphthalene exposure, the haemolymph had significantly increased levels of all marker enzymes. Marker enzymes were inhibited in the gill and digestive gland, and all of the marker enzymes in the haemolymph, gill, and digestive gland were concentration dependent in the majority of cases. The alterations in marker enzymes found in P. viridis haemolymph and the other two tissues were statistically significant.

Conclusions: The current study found a significant relationship between all biomarkers examined in mussels exposed to naphthalene. Overall, the results show that when compared to tissues, haemolypmh is the most sensitive component to naphthalene exposure, and it might be used as a bioindicator of organic pollution exposure.

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