Gudgeon · Gobio gobio

Gudgeon in the Bielby Beck System

Largest measured gudgeon: 11.7 cm

The largest gudgeon measured in Environment Agency surveys of the Bielby Beck System was 11.7 cm, recorded at The Beck,Thornton Bridge DERCORS14 on 18 June 2019.

Across 16 measured gudgeon, the median measured length was 8.2 cm.

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

See gudgeon records across England →

Most recent observation18 June 2019The Beck,Thornton Bridge DERCORS14 · 6 fish

Largest measured gudgeon: 11.7 cm
Median length: 8.2 cm
Fish measured: 16
Survey locations: 2

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	18 Jun 2019	The Beck,Thornton Bridge DERCORS14	154622
10.9 cm	28 Jun 2012	Blackfoss Beck, Woodhouse Farm DERCORS13	131639
10.8 cm	28 Jun 2012	Blackfoss Beck, Woodhouse Farm DERCORS13	131639
10.3 cm	18 Jun 2019	The Beck,Thornton Bridge DERCORS14	154622
10.1 cm	28 Jun 2012	Blackfoss Beck, Woodhouse Farm DERCORS13	131639
9.4 cm	18 Jun 2019	The Beck,Thornton Bridge DERCORS14	154622
9 cm	28 Jun 2012	Blackfoss Beck, Woodhouse Farm DERCORS13	131639
8.5 cm	2 Jul 2002	The Beck,Thornton Bridge DERCORS14	72540
7.8 cm	18 Jun 2019	The Beck,Thornton Bridge DERCORS14	154622
7.8 cm	28 Jun 2012	The Beck,Thornton Bridge DERCORS14	131638

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
The Beck,Thornton Bridge DERCORS14	2 Jul 2002	18 Jun 2019	3
Blackfoss Beck, Woodhouse Farm DERCORS13	28 Jun 2012	11 Jun 2019	2

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

2002–2019

Survey records by year

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

102

003

004

005

006

007

008

009

010

011

212

013

014

015

016

017

018

219

Fish measured by surveyors

Measured length distribution

See how the 16 measured fish were spread across different length ranges.

Smallest: 5.1 cm
Lower quarter: 6.4 cm
Median: 8.2 cm
Upper quarter: 10.2 cm
Largest: 11.7 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Bielby Beck System

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

Stone loach Bullhead Minnow European eel 3-spined stickleback Brown / sea trout

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 →