Successful sterlet rearing in 2023


This year a total of 35.380 sterlets were released into the Austrian Danube and tributaries. A couple hundred individuals are still in the hatchery and are kept for further reproduction and the living genetic databank. Roughly 1200 individuals were tagged with PIT-tags and 1200 smaller individuals were marked with red VIE color (Visible implant elastomer). For wild fish and each year class another VIE color is chosen, to easily separate between year classes, to simplify recognition when recaptured and to distinguish between stocked and wild fish.