| Huvudföda | Procent |
Trofisk nivå (y) |
Studerat utvecklingsstadium | Land | Observationsplats | Ref. |
|---|---|---|---|---|---|---|
| nekton | 86 | 4.3 | adults | USA | Northern Idaho lakes | 13798 |
| nekton | 94 | 4.4 | adults | USA | Northern Idaho lakes | 13798 |
| zoobenthos | 43 | 3.8 | adults | USA | Northern Idaho lakes | 13798 |
| nekton | 50 | 3.9 | juv./adults | USA | Northern Idaho lakes | 13798 |
| nekton | 84 | 4.3 | recruits/juv. | USA | John Day Reservoir, Columbia River Basin | 26982 |
| zoobenthos | 88 | 3.4 | recruits/juv. | USA | Northern Idaho lakes | 13798 |