Species: Stor bruskigle (Glossiphonia complanata)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2014 | 1 | 2 | 2 | 3 |
| 2013 | 1 | 1 | 1 | 1 |
| 2002 | 1 | 1 | 1 | 1 |
| 1998 | 1 | 1 | 1 | 1 |
| 1993 | 1 | 3 | 3 | 3 |
| 1992 | 1 | 6 | 7 | 9 |
| 1991 | 1 | 10 | 10 | 12 |
| 1990 | 1 | 7 | 7 | 7 |
| 1989 | 1 | 6 | 6 | 6 |
| Totalt alle år | 1 | 28 | 29 | 43 |