Behavioral changes and stress response of leather carp (Cyprnus carpio nudus) caused by repeated acoustic noise in the water tank

This study aimed to analyze the behavioral changes and stress responses of cultured leather carp (Cyprinus carpio nudus) for repeated noise exposure. The acoustic stimulus was composed of twenty sets of one second duration noise with an average noise of 147 dB, which was repeated every five minutes. The behavioral changes of the fish were analyzed immediately after noise exposure, three hours, six hours, twelve hours, 24 hours, and 48 hours later. The stress hormone response was also analyzed and compared through blood collection. It was confirmed that the fish were significantly affected by the noise stimulus and unable to be free or adapt to it untill the end of the experiment. The cortisol concentration was also the highest at 38.2 ug/dL after six hours; the glucose concentration did not decrease over time, indicating that stress was maintained and had a significant effect.