Gudgeon · Gobio gobio

Gudgeon in the Main River Marden

Largest measured gudgeon: 15.5 cm

The largest gudgeon measured in Environment Agency surveys of the Main River Marden was 15.5 cm, recorded at Stanley on 19 May 2011.

Across 89 measured gudgeon, the median measured length was 10.7 cm.

Surveyors recorded weights for 82 gudgeon. The median was 0.5 oz (0.015 kg) and the largest recorded weight was 1.6 oz (0.044 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 Marden.

See gudgeon records across England →

Most recent observation19 May 2011Stanley · 7 fish

Largest measured gudgeon: 15.5 cm
Median length: 10.7 cm
Fish measured: 89
Survey locations: 5

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
15.5 cm	19 May 2011	Stanley	126400
15.5 cm	14 Oct 1997	Scott's Mill	77056
15.2 cm	19 May 2011	Stanley	126400
15.1 cm	19 May 2011	Stanley	126400
15 cm	19 May 2011	Stanley	126400
14.7 cm	25 Jul 2002	Calne STW (Te)	60341
14.5 cm	19 May 2011	Stanley	126400
14.2 cm	3 Sept 1998	Abbey Farm	77060
14.1 cm	1 Jul 2003	Calne STW (Te)	76355
13.5 cm	25 Jul 2002	Calne STW (Te)	60341

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
Stanley	19 May 2011	19 May 2011	1
New Leaze Farm	15 Oct 1997	19 Jul 2006	4
Calne STW (Te)	21 May 1998	19 Jul 2006	5
Abbey Farm	3 Sept 1998	3 Sept 1998	1
Scott's Mill	14 Oct 1997	14 Oct 1997	1

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

1997–2011

Survey records by year

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

297

298

099

000

001

102

203

104

105

206

007

008

009

010

111

Fish measured by surveyors

Measured length distribution

See how the 89 measured fish were spread across different length ranges.

Smallest: 6.5 cm
Lower quarter: 9.7 cm
Median: 10.7 cm
Upper quarter: 11.9 cm
Largest: 15.5 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 82 gudgeon. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.004 kg)
Lower quarter: 0.4 oz (0.01 kg)
Median: 0.5 oz (0.015 kg)
Upper quarter: 0.7 oz (0.02 kg)
Heaviest: 1.6 oz (0.044 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 Marden

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

Bullhead Brown / sea trout Minnow Roach Dace Stone loach

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 →