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 |
|---|---|---|---|
| 25 cm | 10 Sept 2009 | Columbjohn (CFTe/wfdi)* | 118874 |
| 21.1 cm | 5 Oct 2006 | Columbjohn (CFTe/wfdi)* | 101733 |
| 20.3 cm | 10 Sept 2009 | Columbjohn (CFTe/wfdi)* | 118874 |
| 17.9 cm | 5 Oct 2023 | Columbjohn (CFTe/wfdi)* | 163507 |
| 15.1 cm | 29 Apr 2019 | Glasshouses | 154868 |
| 14.9 cm | 16 Sept 2008 | Venn Farm (Sp)* | 114468 |
| 14.9 cm | 10 Sept 2005 | Columbjohn (CFTe/wfdi)* | 89417 |
| 14.3 cm | 16 Sept 2022 | Columbjohn (CFTe/wfdi)* | 161466 |
| 14 cm | 10 Sept 2009 | Columbjohn (CFTe/wfdi)* | 118874 |
| 12.9 cm | 1 Jul 2013 | Venn Farm (Sp)* | 137032 |
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 |
|---|---|---|---|
| Glasshouses | 29 Apr 2019 | 22 May 2026 | 2 |
| Columbjohn (CFTe/wfdi)* | 10 Sept 2005 | 5 Oct 2023 | 5 |
| Venn Farm (Sp)* | 16 Sept 2008 | 1 Jul 2013 | 2 |
Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.
2005–2026
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 18 measured fish were spread across different length ranges.
- Smallest
- 7.4 cm
- Lower quarter
- 10.4 cm
- Median
- 13.5 cm
- Upper quarter
- 15.1 cm
- Largest
- 25 cm
Lengths are direct survey measurements rather than anglers’ catches.
Fish weighed by surveyors
Measured weight summary
Recorded weights were available for 5 perch. This is a subset of the measured fish and may not represent the whole population.
- Lightest
- 1.2 oz (0.034 kg)
- Lower quarter
- 1.8 oz (0.052 kg)
- Median
- 4 oz (0.114 kg)
- Upper quarter
- 4.2 oz (0.12 kg)
- Heaviest
- 8 oz (0.228 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 Main Culm
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 →