| Registrering af gydebanker i tilløb til Hald Sø: | ||||||
| År | Dollerup Bæk - system | Mostgård Bæk | Gjelbækken | Krobækken | Kapeldalen m.fl. | Total |
| 1989 | 47 | 0 | 0 | 10 | 3 | 60 |
| 1990 | 52 | 1 | 14 | 11 | 4 | 82 |
| 1991 | 49 | 4 | 1 | 6 | 2 | 62 |
| 1992 | 62 | 17 | 14 | 10 | 4 | 107 |
| 1993 | 104 | 55 | 36 | 12 | 2 | 209 |
| 1994 | 202 | 116 | 56 | 10 | 0 | 384 |
| 1995 | 200 | 124 | 56 | 11 | 5 | 396 |
| 1996 | 144 | 206 | 44 | 14 | 4 | 412 |
| 1997 | 170 | 137 | 38 | 10 | 4 | 359 |
| 1998 | 152 | 110 | 48 | 13 | 0 | 323 |
| 1999 | 186 | 128 | 41 | 9 | 2 | 366 |
| 2000 | 148 | 56 | 14 | 10 | 2 | 230 |
| 2001 | 117 | 106 | 22 | 14 | 2 | 261 |
| 2002 | 68 | 84 | 27 | 2 | 2 | 183 |
| 2003 | 88 | 92 | 29 | 2 | 2 | 213 |
| 2004 | 103 | 98 | 26 | 4 | 2 | 233 |
| 2005 | 65 | 70 | 18 | 2 | 2 | 157 |
| 2006 | 45 | 56 | 8 | 0 | 0 | 109 |
| 2007 | 48 | 54 | 17 | 3 | 1 | 123 |
| 2008 | 31 | 34 | 17 | 0 | 0 | 82 |
| 2009 | 52 | 41 | 14 | 0 | 0 | 107 |
| 2010 | 22 | 37 | 17 | 0 | 0 | 76 |
| 2011 | 82 | 20 | 32 | 1 | 0 | 135 |
| 2012 | 111 | 101 | 15 | 0 | 0 | 227 |
| 2013 | 135 | 114 | 8 | 4 | 0 | 261 |
| 2014 | 94 | 24 | 18 | 0 | 0 | 136 |
| 2015 | 76 | 19 | 1 | 0 | 0 | 96 |
| 2016 | 51 | 16 | 12 | 0 | 0 | 79 |
| 2017 | 36 | 24 | 3 | 0 | 0 | 63 |
| 2018 | 47 | 29 | 14 | 1 | 0 | 91 |
| 2019 | 77 | 50 | 12 | 2 | 2 | 143 |
| 2020 | 25 | 28 | 3 | 1 | 1 | 58 |
| 2021 | 18 | 20 | 5 | 2 | 1 | 46 |
| 2022 | 45 | 57 | 4 | 2 | 0 | 108 |
| 2023 | 54 | 48 | 1 | 0 | 0 | 103 |
| 2024 | 33 | 3 | 1 | 1 | 0 | 38 |