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- Title
Stress Induced Damages in Psammophilic Bivalve Species: A Pilot Study on Wedge Clams from Black Sea Habitats in the Upper Subtidal Zone (Bulgaria).
- Authors
Yakimov, Lachezar P.; Tsvetanova, Elina R.; Georgieva, Almira P.; Raev, Yordan R.; Chipev, Nesho H.; Alexandrova, Albena V.
- Abstract
The aim of the present pilot study was to estimate the presence of oxidative damages in wedge clams (Donax trunculus L.) from different sites in the upper subtidal zone along the Bulgarian Black Sea Coast. In response to this aim the levels of the oxidative stress biomarkers lipid peroxidation, protein oxidation and glutathione, together with the activity of the antioxidant enzymes superoxide dismutase, catalase and glutathione-S-transferase were measured. The obtained results indicated significant variations of the studied biomarkers, depending both on the sampling site and the specific marker. Increased concentrations of lipid peroxidation and protein oxidation, along with glutathione decrease, indicated the presence of stress and tissue damages in the wedge clams. For most of the studied sites a moderate level of oxidative stress in wedge clams was found. Significant oxidative stress was present in the wedge clams from Kabakum Bay. Here, highest values of lipid peroxidation, superoxide dismutase and catalase, along with low glutathione, which was probably depleted by the action of glutathione-S-transferase, were found and this clearly indicated the presence of environmental stress and cell damage. The analysis of samples taken from different seasons, allowed some preliminary conclusions which suggested that the oxidative stress in the wedge clams seemed to be higher in spring, somewhat lower in summer and then somewhat rising in autumn. In conclusion, D. trunculus is a suitable bio-indicator of the stressfulness of the environment in the sandy habitats of the subtidal Black Sea zone and can thus present an "early-warning" signal in biomonitoring studies.
- Subjects
CLAMS; CATALASE; WEDGES; PILOT projects; INTERTIDAL zonation; HABITATS; OXIDATIVE stress; SUPEROXIDE dismutase
- Publication
Ecologia Balkanica, 2020, p51
- ISSN
1313-9940
- Publication type
Article