Individual EA measurements
Largest measured roach
The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.
| Length | Survey date | Survey location | Survey ID |
|---|---|---|---|
| 26 cm | 6 Apr 1994 | Pylons | 54331 |
| 24.2 cm | 9 May 2017 | Downstream Mays Sluice | 150488 |
| 23.5 cm | 9 Apr 2010 | Downstream Mays Sluice | 123243 |
| 22.5 cm | 5 Nov 1991 | Downstream Bourne STW | 54315 |
| 22 cm | 9 Jun 2003 | Downstream Mays Sluice | 78420 |
| 21.8 cm | 9 May 2017 | Downstream Mays Sluice | 150488 |
| 21.5 cm | 9 Jun 2003 | Downstream Mays Sluice | 78420 |
| 21.4 cm | 9 May 2017 | Downstream Mays Sluice | 150488 |
| 21.2 cm | 9 May 2017 | Downstream Mays Sluice | 150488 |
| 21.2 cm | 9 May 2017 | Downstream Mays Sluice | 150488 |
Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.
Explore the river
Where roach were found
Each point marks a survey location with at least one roach record.
Choose a point on the map to see what was recorded there.
Map points are approximate and don’t show fishing access. Check local permissions before visiting.
| Place surveyed | First recorded | Last recorded | Visits finding roach |
|---|---|---|---|
| Downstream Mays Sluice | 13 May 1991 | 9 May 2017 | 13 |
| Downstream Bourne STW | 5 Nov 1991 | 23 Mar 2011 | 2 |
| Pylons | 6 Apr 1994 | 6 Apr 1994 | 1 |
| Borrow Pit Lane | 16 May 1991 | 16 May 1991 | 1 |
| Upstream Tongue End Pump | 14 May 1991 | 14 May 1991 | 1 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
1991–2017
Survey records by year
Each bar shows how many survey visits recorded roach that year.
Fish measured by surveyors
Measured length distribution
See how the 3,366 measured fish were spread across different length ranges.
- Smallest
- 3.5 cm
- Lower quarter
- 6 cm
- Median
- 8 cm
- Upper quarter
- 9.8 cm
- Largest
- 26 cm
Lengths are direct survey measurements rather than anglers’ catches.
More fish in this river
Explore the Bourne Eau
Compare other species with enough survey and measurement data for a detailed page.
Before you fish
Good to know
These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.
Learn how RiverFish uses the data →