RiverFish

Perch · Perca fluviatilis

Perch in the Rochdale canal

Largest measured perch: 21.5 cm

The largest perch measured in Environment Agency surveys of the Rochdale canal was 21.5 cm, recorded at Grimshaw Lane Swing Bridge on 8 November 2011.

Across 19 measured perch, the median measured length was 9.9 cm.

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

See perch records across England →

Most recent observation8 November 2011Grimshaw Lane Swing Bridge · 13 fish
Largest measured perch
21.5 cm
Median length
9.9 cm
Fish measured
19
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.

LengthSurvey dateSurvey locationSurvey ID
21.5 cm8 Nov 2011Grimshaw Lane Swing Bridge129082
18.5 cm8 Nov 2011Grimshaw Lane Swing Bridge129082
17.7 cm8 Nov 2011Grimshaw Lane Swing Bridge129082
14.5 cm8 Nov 2011Grimshaw Lane Swing Bridge129082
13.9 cm8 Nov 2011Grimshaw Lane Swing Bridge129082
13.5 cm8 Nov 2011Grimshaw Lane Swing Bridge129082
12 cm8 Nov 2011Grimshaw Lane Swing Bridge129082
10.1 cm8 Nov 2011Grimshaw Lane Swing Bridge129082
10 cm8 Nov 2011Grimshaw Lane Swing Bridge129082
9.9 cm8 Nov 2011Grimshaw Lane Swing Bridge129082

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 surveyedFirst recordedLast recordedVisits finding perch
Grimshaw Lane Swing Bridge8 Nov 20118 Nov 20111
Upper Durn (scrapyard)7 Nov 20117 Nov 20111
Lower Durn (Garage)7 Nov 20117 Nov 20111

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

2011–2011

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 19 measured fish were spread across different length ranges.

Smallest
5.5 cm
Lower quarter
6.3 cm
Median
9.9 cm
Upper quarter
13.7 cm
Largest
21.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Rochdale canal

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

Pike

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 →