Individual EA measurements
Largest measured perch
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 |
|---|---|---|---|
| 38.2 cm | 24 Jun 2013 | Downstream Buxton Mill | 136836 |
| 37.8 cm | 24 Jun 2013 | Downstream Buxton Mill | 136836 |
| 36 cm | 2 Aug 2016 | Downstream Mayton Bridge | 149354 |
| 36 cm | 11 Jul 2016 | Downstream Buxton Mill | 148926 |
| 33.8 cm | 24 Jun 2013 | Downstream Buxton Mill | 136836 |
| 32.8 cm | 11 Jul 2016 | Downstream Buxton Mill | 148926 |
| 32.7 cm | 15 Jul 2008 | Downstream Buxton Mill | 112286 |
| 32.7 cm | 20 Jul 2007 | Downstream Plantation Bridge | 106273 |
| 32 cm | 22 Jun 2009 | Downstream Buxton Mill | 117562 |
| 30.8 cm | 19 Jun 2006 | Downstream Buxton Mill | 100233 |
Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.
Explore the river
Where perch were found
Each point marks a survey location with at least one perch 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 perch |
|---|---|---|---|
| Downstream Plantation Bridge | 18 Mar 1993 | 20 Jun 2025 | 11 |
| Downstream Buxton Mill | 24 Mar 1993 | 17 Jun 2025 | 14 |
| Lamas Hall | 31 Mar 1993 | 9 Jun 2025 | 7 |
| Upstream Oxnead Bridge | 12 Mar 1993 | 20 May 2025 | 12 |
| Downstream Mayton Bridge | 2 Apr 1993 | 2 Aug 2016 | 3 |
| Burgh Hall Farm | 10 Mar 1993 | 18 Jun 2010 | 2 |
| Downstream Aylsham Bypass | 8 Mar 1993 | 15 May 2010 | 4 |
| Upstream Coltishall Bridge | 7 Apr 1993 | 7 Apr 1993 | 1 |
| Upstream Mayton Bridge | 28 Mar 1993 | 28 Mar 1993 | 1 |
| Downstream Oxnead Mill | 11 May 1988 | 17 Mar 1993 | 2 |
| Downstream Burgh Mill | 11 Mar 1993 | 11 Mar 1993 | 1 |
| Downstream Burgh Hall Lock | 9 Mar 1993 | 9 Mar 1993 | 1 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
1988–2025
Survey records by year
Each bar shows how many survey visits recorded perch that year.
Fish measured by surveyors
Measured length distribution
See how the 407 measured fish were spread across different length ranges.
- Smallest
- 4.4 cm
- Lower quarter
- 8.3 cm
- Median
- 9.5 cm
- Upper quarter
- 16.9 cm
- Largest
- 38.2 cm
Lengths are direct survey measurements rather than anglers’ catches.
Fish weighed by surveyors
Measured weight summary
Recorded weights were available for 2 perch. This is a subset of the measured fish and may not represent the whole population.
- Lightest
- 2.4 oz (0.069 kg)
- Lower quarter
- 3.1 oz (0.089 kg)
- Median
- 3.8 oz (0.109 kg)
- Upper quarter
- 4.6 oz (0.129 kg)
- Heaviest
- 5.3 oz (0.149 kg)
These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.
More fish in this river
Explore the River Bure (central)
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 →