Chub · Leuciscus cephalus

Chub in the River Irwell

Largest measured chub: 31.1 cm

The largest chub measured in Environment Agency surveys of the River Irwell was 31.1 cm, recorded at Iwir10 on 8 July 2003.

Across 235 measured chub, the median measured length was 7.6 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 Irwell.

See chub records across England →

Most recent observation26 September 2008Iwir10 · 15 fish

Largest measured chub: 31.1 cm
Median length: 7.6 cm
Fish measured: 235
Survey locations: 4

Individual EA measurements

Largest measured chub

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
31.1 cm	8 Jul 2003	Iwir10	76336
30.2 cm	8 Jul 2003	Iwir10	76336
19 cm	6 Jun 2006	Iwir25	100984
18.5 cm	6 Jun 2006	Iwir25	100984
18.3 cm	28 Jun 2004	Iwir20	81591
17.2 cm	26 Sept 2008	Iwir10	116186
17.2 cm	6 Jun 2006	Iwir25	100984
17.1 cm	6 Jun 2006	Iwir25	100984
17.1 cm	6 Jun 2006	Iwir25	100984
16.7 cm	6 Jun 2006	Iwir25	100984

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 surveyed	First recorded	Last recorded	Visits finding chub
Iwir10	8 Jul 2003	26 Sept 2008	5
Iwir25	6 Jun 2006	6 Jun 2006	1
Iwir20	7 Jul 2003	6 Jun 2006	4
Iwir15	8 Jun 2005	5 Jun 2006	2

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

2003–2008

Survey records by year

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

203

204

305

406

007

108

Fish measured by surveyors

Measured length distribution

See how the 235 measured fish were spread across different length ranges.

Smallest: 3.3 cm
Lower quarter: 5.6 cm
Median: 7.6 cm
Upper quarter: 13.5 cm
Largest: 31.1 cm

0–99 mm

153

100–199 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Irwell

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

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