Structure of the snapping shrimps' acoustical activity in the Black Sea shallow water

Monitoring and analysis of the ambient noise on the shelf of the Black Sea produced by snapping shrimps is provided. The deviations of this process from the pure random one, including an increase in the coefficient of variation and a positive correlation of neighboring intervals were revealed. The fractal properties of the activity, which manifested themselves in a power dependence of the Fano factors on the counting time and in the dynamic changes of the Hurst index, was noticed. The chaotic transition of the click generation process in the population from pure random to trend was observed and vice versa.