Electrophoresis, Polyacrylamide Gel, Heat-Shock Proteins - metabolism, Bivalvia - physiology, Immunoblotting, JNK Mitogen-Activated Protein Kinases - metabolism, Hot Temperature, Greece, Animals, Analysis of Variance, Ecosystem, Stress, Physiological - metabolism, Signal Transduction - physiology, Bivalvia - metabolism, p38 Mitogen-Activated Protein Kinases...