Castor Mill Channel
8 taxon records: Chub, Dace, Perch, Pike, Gudgeon…
Environment Agency freshwater records
River Nene
Freshwater surveys recorded 25 named fish species across 71 reviewed monitoring locations between 1979 and 2024.
Data snapshot10 August 2026Latest survey in this dataset: 2024
- Named species
- 25
- Monitoring sites
- 71
- Completed surveys
- 263
- Survey coverage
- 1979–2024
Geographic coverage
EA monitoring locations
71 of 71 locations shown
Select a point to inspect an Environment Agency monitoring location.
Positions are deliberately rounded. These are monitoring locations, not fishing access points.
Recorded diversity
Fish species recorded
Select a species to show only monitoring locations where it appears in an EA survey record.
| Species | Sites recorded | Surveys recorded | Latest observation |
|---|---|---|---|
| Rutilus rutilus | 69 | 256 | 30 Oct 2024 |
| Perca fluviatilis | 68 | 235 | 30 Oct 2024 |
| Gobio gobio | 66 | 167 | 30 Oct 2024 |
| Esox lucius | 64 | 217 | 30 Oct 2024 |
| Leuciscus leuciscus | 59 | 157 | 30 Oct 2024 |
| Leuciscus cephalus | 59 | 156 | 30 Oct 2024 |
| Abramis brama | 54 | 149 | 19 Sept 2018 |
| Alburnus alburnus | 49 | 177 | 18 Sept 2018 |
| Tinca tinca | 48 | 122 | 30 Oct 2024 |
| Anguilla anguilla | 39 | 79 | 19 Sept 2018 |
| Gymnocephalus cernuus | 34 | 82 | 22 Jun 2015 |
| Scardinius erythrophthalmus | 16 | 31 | 12 Sept 2012 |
| Abramis bjoerkna | 15 | 30 | 15 Sept 2011 |
| Cottus gobio | 14 | 28 | 19 Sept 2018 |
| Cyprinus carpio | 13 | 15 | 30 Jun 2008 |
| Phoxinus phoxinus | 12 | 30 | 19 Sept 2018 |
| Cobitis taenia | 12 | 29 | 17 Sept 2018 |
| Gasterosteus aculeatus | 12 | 14 | 17 Sept 2018 |
| Barbatula barbatula | 10 | 15 | 18 Sept 2013 |
| Barbus barbus | 7 | 11 | 30 Oct 2024 |
| Sander lucioperca | 6 | 9 | 6 Aug 2003 |
| Salmo trutta | 3 | 4 | 29 Jul 1998 |
| Carassius carassius | 2 | 2 | 26 Jul 1989 |
| Oncorhynchus mykiss | 2 | 2 | 6 Jun 1995 |
| Pungitius pungitius | 1 | 1 | 18 Sept 2009 |
“Recorded” means the species appears in an EA survey record. Site and survey totals show evidence coverage, not abundance.
Latest in the snapshot
Recent surveys
Cogenhoe Back Channel
5 taxon records: Chub, Perch, Pike, Roach, Tench
Alwalton Backchannel
12 taxon records: Chub, Roach, Perch, Gudgeon, Dace…
Castor Mill Channel
14 taxon records: Dace, Chub, Roach, Barbel, Perch…
Reviewed identity
What these records mean
Three reviewed main-river reaches: above Wellingborough, above Wansford and below Wansford. The separate Old Course drainage parent is excluded.
Survey methods, effort, locations and coverage vary. Monitoring coordinates are rounded and do not indicate public access. Counts are not population trends.
Read the full methodology →