| Main Ref. | National Register of Lake Surveys, 2006 (Ref. 57534) |
|---|---|
| Name used | Gymnocephalus cernuus |
| Locality | Lake ULVSJÖN |
| Station | FRI-661521-130182-20000805 |
| Year | 2000 |
| Water depth | 31 m |
| Altitude | 211 m |
| Coordinates | In decimal: 59.61, 12.30 |
| Collector | Freshwater Research Institute |
| Identifier | Freshwater Research Institute |