Monitoring of the sturgeon juveniles was realized through acoustic telemetry on the sector between Corabia, km 633 of the Danube and up to the spilling into the Black Sea on the three branches: Chilia, Sulina and Sf. Gheorghe. The installation of the receiver stations was done using monitoring systems developed by experts INCDPM and presented in several scientific papers (Bâdiliță A.M., et.al., 2013; Deák Gy., et.al., 2013, 2014; Raschi M.C., et.al., 2016) which incorporates these equipments and which have been mounted in such a way as to be able to capture as best as possible the sound signal transmitted by the tags through the water. The two monitoring systems are of two types: floating (DKMR-01T) and fixed (DKTB) types, both proposed for patent at the Office for Inventions and Trademarks (OSIM).
By monitoring the behavior of ultrasonically tagged sturgeon juveniles, a unique database was obtained at the level of the Danube river basin, and by processing it obtained results such as:
- Establish the main sturgeon juveniles migration routes with an emphasis on their favorite routes on their way to the favorable habitats from the Black Sea;
- Distribution of ultrasonically tagged sturgeon juveniles at the Danube Delta level, observing their preference for a particular branch;
- The time elapsed since the release of the tagged sturgeon specimens until their arrival at the Black Sea;
- Daily/nocturnal distribution of ultrasonically tagged sturgeon for observation of their migration intensity according to daytime;
- Establishing the debits in the areas of interest and highlighting their influence on the sturgeon juveniles migration;
- Maps with of sturgeon juveniles migratory routes.