Gudgeon · Gobio gobio

Gudgeon in the Main River Chew

Largest measured gudgeon: 21.3 cm

The largest gudgeon measured in Environment Agency surveys of the Main River Chew was 21.3 cm, recorded at Stanton Drew (Te) on 8 September 2009.

Across 835 measured gudgeon, the median measured length was 10.5 cm.

Surveyors recorded weights for 344 gudgeon. The median was 0.5 oz (0.0135 kg) and the largest recorded weight was 5.5 oz (0.155 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 River Chew.

See gudgeon records across England →

Most recent observation11 July 2023Stanton Drew (Te) · 6 fish

Largest measured gudgeon: 21.3 cm
Median length: 10.5 cm
Fish measured: 835
Survey locations: 8

Individual EA measurements

Largest measured gudgeon

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
21.3 cm	8 Sept 2009	Stanton Drew (Te)	118852
15.9 cm	6 Jul 2023	Pensford (Te)	162500
15.9 cm	8 Jul 2003	Downstream Chew Valley Lake (Te)	76361
15.5 cm	13 Aug 2003	Pensford (Te)	76668
15.5 cm	8 Jul 2003	Downstream Chew Valley Lake (Te)	76361
15.3 cm	8 Jul 2003	Downstream Chew Valley Lake (Te)	76361
15.3 cm	8 Jul 2003	Downstream Chew Valley Lake (Te)	76361
15.3 cm	8 Jul 2003	Downstream Chew Valley Lake (Te)	76361
15.2 cm	8 Sept 2009	Stanton Drew (Te)	118852
15.2 cm	8 Jul 2003	Downstream Chew Valley Lake (Te)	76361

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where gudgeon were found

Each point marks a survey location with at least one gudgeon 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 gudgeon
Stanton Drew (Te)	31 Aug 2005	11 Jul 2023	11
Pensford (Te)	15 May 2002	6 Jul 2023	10
Keynsham Park (Te)	3 Sept 2003	29 Jun 2023	9
Chewton Keynsham	4 Sept 2007	17 Jul 2019	3
Compton Dando (Te)	20 Jun 2003	21 Aug 2012	7
Chew Magna	5 Jul 2011	5 Jul 2011	1
Downstream Chew Valley Lake (Te)	8 Jul 2003	13 Jul 2004	2
Byemills	5 Sept 2002	5 Sept 2002	1

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

2002–2023

Survey records by year

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

202

403

404

405

406

507

308

109

110

111

212

213

114

015

316

017

018

419

020

021

022

323

Fish measured by surveyors

Measured length distribution

See how the 835 measured fish were spread across different length ranges.

Smallest: 5 cm
Lower quarter: 8.6 cm
Median: 10.5 cm
Upper quarter: 12 cm
Largest: 21.3 cm

0–99 mm

334

100–199 mm

500

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 344 gudgeon. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.002 kg)
Lower quarter: 0.2 oz (0.007 kg)
Median: 0.5 oz (0.0135 kg)
Upper quarter: 0.8 oz (0.024 kg)
Heaviest: 5.5 oz (0.155 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 River Chew

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

Bullhead Roach Minnow Stone loach Brown / sea trout European eel

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 →