Gudgeon · Gobio gobio

Gudgeon in the River Itchen

Largest measured gudgeon: 16.4 cm

The largest gudgeon measured in Environment Agency surveys of the River Itchen was 16.4 cm, recorded at Railway on 31 August 2005.

Across 30 measured gudgeon, the median measured length was 11.7 cm.

Surveyors recorded weights for 7 gudgeon. The median was 1.5 oz (0.043 kg) and the largest recorded weight was 2 oz (0.057 kg).

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

See gudgeon records across England →

Most recent observation7 September 2023Lower Itchen Fishery - Hut Run · 1 fish

Largest measured gudgeon: 16.4 cm
Median length: 11.7 cm
Fish measured: 30
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
16.4 cm	31 Aug 2005	Railway	86157
15.5 cm	7 Sept 2023	Lower Itchen Fishery - Hut Run	163546
15.4 cm	31 Aug 2005	Railway	86157
15.2 cm	14 Aug 2002	Rickety	55083
14.5 cm	19 Sept 2001	Rickety	56270
14.2 cm	14 Aug 2002	Rickety	55083
14.1 cm	9 Sept 2020	Caravan Pool, Highbridge	156386
14.1 cm	6 Oct 2004	Railway	82693
13.7 cm	3 Sept 2008	Bishopstoke Barge	114676
13.3 cm	4 Sept 2009	Bishopstoke Lock	120541

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
Lower Itchen Fishery - Hut Run	7 Sept 2023	7 Sept 2023	1
Caravan Pool, Highbridge	9 Sept 2020	9 Sept 2020	1
Mansbridge	16 Sept 2019	16 Sept 2019	1
Bishopstoke Barge	7 Aug 2007	22 Aug 2017	6
Bishopstoke Lock	4 Sept 2009	4 Sept 2009	1
Railway	6 Oct 2004	31 Aug 2005	2
Rickety	19 Sept 2001	14 Aug 2002	2

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

2001–2023

Survey records by year

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

101

102

003

104

105

006

107

108

109

110

011

012

113

014

115

016

117

018

119

120

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 30 measured fish were spread across different length ranges.

Smallest: 5.5 cm
Lower quarter: 9.9 cm
Median: 11.7 cm
Upper quarter: 14 cm
Largest: 16.4 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 7 gudgeon. This is a subset of the measured fish and may not represent the whole population.

Lightest: 1 oz (0.029 kg)
Lower quarter: 1.3 oz (0.0365 kg)
Median: 1.5 oz (0.043 kg)
Upper quarter: 1.8 oz (0.0505 kg)
Heaviest: 2 oz (0.057 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 Itchen

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

Brown / sea trout Bullhead Minnow European eel Atlantic salmon Grayling

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 →