RiverFish

Chub · Leuciscus cephalus

Chub in the River Desborough Island

Largest measured chub: 19 cm

The largest chub measured in Environment Agency surveys of the River Desborough Island was 19 cm, recorded at Desborough Island Downstream Fry on 21 August 2018.

Across 1,639 measured chub, the median measured length was 2.6 cm.

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

See chub records across England →

Most recent observation3 September 2025Desborough Island Upstream Fry · 108 fish
Largest measured chub
19 cm
Median length
2.6 cm
Fish measured
1,639
Survey locations
3

Individual EA measurements

Largest measured chub

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
19 cm21 Aug 2018Desborough Island Downstream Fry153444
12.5 cm21 Aug 2018Desborough Island Downstream Fry153444
12.3 cm26 Aug 2016Desborough Island Downstream Fry149240
12 cm20 Aug 2009Desborough Island Downstream Fry120814
11 cm3 Sept 2025Desborough Island Downstream Fry178515
11 cm22 Aug 2007Desborough Island 10C108636
9.7 cm20 Aug 2024Desborough Island Downstream Fry166651
9.3 cm19 Aug 2010Desborough Island Upstream Fry124943
9.3 cm20 Aug 2009Desborough Island Downstream Fry120814
7.7 cm26 Aug 2016Desborough Island Downstream Fry149240

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

Explore the river

Where chub were found

Each point marks a survey location with at least one chub 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 surveyedFirst recordedLast recordedVisits finding chub
Desborough Island Upstream Fry22 Aug 20063 Sept 202514
Desborough Island Downstream Fry22 Sept 20063 Sept 202516
Desborough Island 10C22 Aug 200722 Aug 20071

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

2006–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 1,639 measured fish were spread across different length ranges.

Smallest
0.9 cm
Lower quarter
2.2 cm
Median
2.6 cm
Upper quarter
3.2 cm
Largest
19 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Desborough Island

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

Roach Perch Dace Bleak Ruffe Gudgeon

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 →