| Huvudföda | Procent |
Trofisk nivå (y) |
Studerat utvecklingsstadium | Land | Observationsplats | Ref. |
|---|---|---|---|---|---|---|
| zoobenthos | 73 | 4.0 | juv./adults | Russia | Lake Bol'shoe Lebyazh'e, Arkhangel Province, 1981 | 9061 |
| zoobenthos | 56 | 3.4 | larvae | Germany | Barther Bodden, April & July 1987-1988, April 1989 | 30592 |
| zooplankton | 48 | 3.0 | larvae | Germany | Elbe Estuary, June 1993, April-July 1994 | 30592 |