A5016188192- Fish Ecology and Management Studies
- Environmental and Biological Research in Conflict Zones
- Aquatic Invertebrate Ecology and Behavior
- Fish Biology and Ecology Studies
Sofia University "St. Kliment Ohridski"
2021-2022
The downstream migration of young-of-the-year (YoY) four sturgeon species (Acipenser ruthenus, A. stellatus, gueldenstaedtii and Huso huso) was monitored in the Danube at river km 396 8 continuous years (2014–2021). A total 713 YoY specimens were registered for whole period. most frequent migrant on an annual basis observed 6 out years. abundant young sturgeons during first ruthenus with 599 specimens, followed by stellatus. For H. huso, only 7 entire natural hybrids × stellatus quite...
All sturgeon species currently living in the Danube River are either critically endangered or at edge of extinction. Sturgeons mainly benthic feeders, with a diet molluscs, crustaceans, and small fishes. During last two decades, we have seen significant change composition invertebrates as result anthropogenic impacts – hydrological habitat modifications, introduction alien invasive species. The aim this study was to investigate food importance different prey taxa, describe feeding strategies...