Roach · Rutilus rutilus

Roach in the Main Semington Brook

Largest measured roach: 29.8 cm

The largest roach measured in Environment Agency surveys of the Main Semington Brook was 29.8 cm, recorded at Mill Farm Bulkington on 2 August 2012.

Across 130 measured roach, the median measured length was 12.7 cm.

Surveyors recorded weights for 94 roach. The median was 1.4 oz (0.0385 kg) and the largest recorded weight was 9 oz (0.254 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Main Semington Brook.

See roach records across England →

Most recent observation2 August 2012Mill Farm Bulkington · 20 fish

Largest measured roach: 29.8 cm
Median length: 12.7 cm
Fish measured: 130
Survey locations: 7

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
29.8 cm	2 Aug 2012	Mill Farm Bulkington	132649
24.3 cm	2 Aug 2001	Norney Bridge	20200
23.3 cm	21 May 1997	Pantry Bridge (Te)	77216
22.6 cm	10 Jul 1997	Worton	77208
22.2 cm	10 Jul 1997	Worton	77208
22.1 cm	2 Aug 2001	Norney Bridge	20200
22 cm	10 Jul 1997	Worton	77208
21.7 cm	23 Aug 2005	Pantry Bridge (Te)	85626
21.6 cm	10 Jul 1997	Worton	77208
20.9 cm	10 Jul 1997	Worton	77208

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
Whaddon Grove Farm	2 Aug 2012	2 Aug 2012	1
Mill Farm Bulkington	2 Aug 2012	2 Aug 2012	1
Baldham Farm	2 Aug 2012	2 Aug 2012	1
Pantry Bridge (Te)	21 May 1997	12 Jul 2006	5
Norney Bridge	2 Aug 2001	2 Aug 2001	1
Worton	10 Jul 1997	10 Jul 1997	1
Oxen Leaze Farm (Se-01)	17 Jun 1997	17 Jun 1997	1

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1997–2012

Survey records by year

Each bar shows how many survey visits recorded roach that year.

397

098

099

000

101

002

103

104

105

106

007

008

009

010

011

312

Fish measured by surveyors

Measured length distribution

See how the 130 measured fish were spread across different length ranges.

Smallest: 5.1 cm
Lower quarter: 9.9 cm
Median: 12.7 cm
Upper quarter: 16.6 cm
Largest: 29.8 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 94 roach. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.002 kg)
Lower quarter: 0.7 oz (0.021 kg)
Median: 1.4 oz (0.0385 kg)
Upper quarter: 3.1 oz (0.0865 kg)
Heaviest: 9 oz (0.254 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Main Semington Brook

Compare other species with enough survey and measurement data for a detailed page.

Brown / sea trout Gudgeon Stone loach Dace Minnow 3-spined stickleback

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 →