Automatic Search and Analysis on Sinusoidal Whistle Signal of Captive Bottlenose Dolphins

Abstract

1It is inefficient to observe the biological behavior of bottlenose dolphin full time artificially. A kind of correlation method was proposed, the acoustic spectrum of Sinusoidal whistle signals emitted from captive dolphins from 19:00 to 08:00 in a year were searched automatically.The results show that the occurrences of Sinusoidal signals were relatively high in August, September and October. There was the highest proportion in August. By comparison and analysis with a year's feeding records on dolphin's behaviors, water temperature and salinity, it can be found that when the frequency of occurrence for this type signals was larger, the dolphins had more bad mood symptoms. That would be related with the water temperature and water salinity. The breeder can solve the problem by changing water or adjusting the food structure as so on. The results may be valuable for further study on dolphin biological behavior and animal protection.