| Main Ref. | National Register of Lake Surveys, 2006 (Ref. 57534) |
|---|---|
| Name used | Gymnocephalus cernuus |
| Locality | Lake VÄSTRA SILEN |
| Station | FRI-656961-128876-19850826 |
| Year | 1985 |
| Water depth | 54 m |
| Altitude | 97 m |
| Coordinates | In decimal: 59.20, 12.11 |
| Collector | Värmland Province Fishery Unit |
| Identifier | Värmland Province Fishery Unit |