Perch · Perca fluviatilis

Perch in the River Irwell

Largest measured perch: 32.7 cm

The largest perch measured in Environment Agency surveys of the River Irwell was 32.7 cm, recorded at Iwir10 on 8 June 2005.

Across 47 measured perch, the median measured length was 11.4 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 perch records across England →

Most recent observation7 June 2006Iwir10 · 6 fish

Largest measured perch: 32.7 cm
Median length: 11.4 cm
Fish measured: 47
Survey locations: 3

Individual EA measurements

Largest measured perch

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
32.7 cm	8 Jun 2005	Iwir10	84864
31.8 cm	8 Jul 2003	Iwir10	76336
28.1 cm	7 Jun 2006	Iwir10	100157
26 cm	8 Jun 2005	Iwir10	84864
25.5 cm	1 Jul 2004	Iwir10	81586
24.6 cm	8 Jun 2005	Iwir10	84864
24.6 cm	1 Jul 2004	Iwir10	81586
23.6 cm	7 Jun 2006	Iwir10	100157
23.5 cm	8 Jun 2005	Iwir10	84864
22.6 cm	1 Jul 2004	Iwir10	81586

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

Explore the river

Where perch were found

Each point marks a survey location with at least one perch 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 perch
Iwir10	8 Jul 2003	7 Jun 2006	4
Iwir25	6 Jun 2006	6 Jun 2006	1
Iwir20	7 Jun 2005	7 Jun 2005	1

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

2003–2006

Survey records by year

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

103

104

205

206

Fish measured by surveyors

Measured length distribution

See how the 47 measured fish were spread across different length ranges.

Smallest: 4 cm
Lower quarter: 7.7 cm
Median: 11.4 cm
Upper quarter: 20.9 cm
Largest: 32.7 cm

0–99 mm

100–199 mm

200–299 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 →