Gudgeon · Gobio gobio

Gudgeon in the Jubilee River

Largest measured gudgeon: 11.7 cm

The largest gudgeon measured in Environment Agency surveys of the Jubilee River was 11.7 cm, recorded at Black Potts on 19 August 2003.

Across 2,006 measured gudgeon, the median measured length was 3.9 cm.

Surveyors recorded one individual weight: 7.1 oz (0.2 kg).

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

See gudgeon records across England →

Most recent observation23 August 2013Upstream of Slough Weir · 5 fish

Largest measured gudgeon: 11.7 cm
Median length: 3.9 cm
Fish measured: 2,006
Survey locations: 7

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
11.7 cm	19 Aug 2003	Black Potts	79278
11.4 cm	19 Aug 2003	Black Potts	79278
11.2 cm	19 Aug 2003	Black Potts	79278
10.6 cm	19 Aug 2003	Black Potts	79278
10.6 cm	19 Aug 2003	Black Potts	79278
10.6 cm	19 Aug 2003	Black Potts	79278
10.5 cm	21 Aug 2013	Conservation Section No 2 (US)	138210
10.4 cm	19 Aug 2003	Black Potts	79278
10.2 cm	19 Aug 2003	Black Potts	79278
9.7 cm	23 Aug 2013	Taplow	138209

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
Upstream of Slough Weir	26 Aug 2002	23 Aug 2013	4
Taplow	26 Sept 2002	23 Aug 2013	8
Eton Far Shore	29 Aug 2007	22 Aug 2013	4
Conservation Section No 2 (US)	19 Aug 2003	21 Aug 2013	5
Conservation Section No 1 (DS)	1 Sept 2004	21 Aug 2013	4
Black Potts	19 Aug 2003	26 Aug 2009	5
Eton Near (North) Shore	25 Sept 2002	25 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.

2002–2013

Survey records by year

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

302

403

304

205

006

607

208

509

110

011

012

513

Fish measured by surveyors

Measured length distribution

See how the 2,006 measured fish were spread across different length ranges.

Smallest: 1.4 cm
Lower quarter: 3 cm
Median: 3.9 cm
Upper quarter: 5.1 cm
Largest: 11.7 cm

0–99 mm

1997

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 7.1 oz (0.2 kg)

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

More fish in this river

Explore the Jubilee River

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

3-spined stickleback Perch Stone loach Roach 10-spined stickleback Bullhead

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 →