| Food I | Food II | Food III | Food name | Country | Predator Stage |
|---|---|---|---|---|---|
| detritus | detritus | debris | detritus | Russia | juv./adults |
| nekton | finfish | bony fish | unidentified fishes | Russia | juv./adults |
| zoobenthos | benth. crust. | amphipods | Gammarids | Russia | juv./adults |
| zooplankton | fish (early stages) | fish eggs/larvae | eggs | Russia | juv./adults |