We use them to keep in touch with our family and friends, take pictures and share them on social media, or have fun enjoying video games. EU environmental protection policy, primarily based on a sustainable improvement approach, requires quick and non-expensive strategies of marine ecosystem monitoring. Acoustic techniques, which fulfill these necessities, are widely used as a dependable method of fish stock assessment. Systematic acoustic surveys are conducted within the Baltic Sea in order to estimate the abundance of ecologically and commercially … A current description of the model is on the market as Appendix 1 to the report of …