RiverFish

Perch · Perca fluviatilis

Perch in the River Ouzel

Largest measured perch: 35.4 cm

The largest perch measured in Environment Agency surveys of the River Ouzel was 35.4 cm, recorded at Newport Pagnell on 20 June 2013.

Across 1,210 measured perch, the median measured length was 13.8 cm.

Surveyors recorded one individual weight: 4.4 oz (0.124 kg).

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

See perch records across England →

Most recent observation16 April 2026DS Caldecote Mill · 2 fish
Largest measured perch
35.4 cm
Median length
13.8 cm
Fish measured
1,210
Survey locations
15

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
35.4 cm20 Jun 2013Newport Pagnell136567
35.3 cm5 Dec 1997Stoke Hammond29058
34.5 cm31 May 2016Leighton Buzzard148104
34.3 cm16 Nov 1990Leighton Buzzard29042
34.1 cm3 Jun 2013Leighton Buzzard136275
33.3 cm5 Dec 1997Stoke Hammond29058
33.3 cm16 Nov 1990Leighton Buzzard29042
33.3 cm16 Nov 1990Leighton Buzzard29042
32.8 cm16 Nov 1990Leighton Buzzard29042
32.8 cm16 Nov 1990Leighton Buzzard29042

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
DS Caldecote Mill17 Jun 201316 Apr 20264
Open University4 Jan 19955 Aug 202515
Manor Sports Field12 Nov 199031 Jul 202516
Leighton Buzzard27 Oct 19868 Jul 201916
US Open University3 Sept 20146 Oct 20174
Newport Pagnell7 Nov 199010 Aug 20165
US Leighton Buzzard21 Mar 201621 Mar 20161
M1 Road Bridge8 Nov 199013 May 20105
Caldecote Mill6 Nov 199012 May 201012
Castle Meadow22 Nov 199030 Apr 200911
US Billington12 Apr 200712 Apr 20071
Cotton Valley STW9 Nov 19902 Apr 20042
Simpson Ouzel21 Nov 199029 Mar 20044
Stoke Hammond28 Oct 198624 Mar 20043
Billington27 Oct 198626 Nov 19974

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

1986–2026

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 1,210 measured fish were spread across different length ranges.

Smallest
3.8 cm
Lower quarter
11.3 cm
Median
13.8 cm
Upper quarter
17.8 cm
Largest
35.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight
4.4 oz (0.124 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Ouzel

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

Gudgeon Roach Dace Bullhead Minnow 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 →