Perch · Perca fluviatilis

Perch in the River Ash (Thames)

Largest measured perch: 23.9 cm

The largest perch measured in Environment Agency surveys of the River Ash (Thames) was 23.9 cm, recorded at Gaston Bridge on 23 August 2011.

Across 84 measured perch, the median measured length was 12.4 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 Ash (Thames).

See perch records across England →

Most recent observation5 September 2023Gaston Bridge · 5 fish

Largest measured perch: 23.9 cm
Median length: 12.4 cm
Fish measured: 84
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
23.9 cm	23 Aug 2011	Gaston Bridge	127566
21.5 cm	13 Oct 2005	Gaston Bridge	86943
19.9 cm	23 Aug 2011	Gaston Bridge	127566
19.7 cm	24 Aug 2017	Gaston Bridge	151512
19.6 cm	23 Aug 2011	Gaston Bridge	127566
19.5 cm	13 Oct 2005	Gaston Bridge	86943
19.3 cm	20 Aug 2010	Ford Bridge Roundabout	123563
19.2 cm	23 Aug 2011	Gaston Bridge	127566
18.5 cm	13 Oct 2005	Gaston Bridge	86943
18 cm	13 Oct 2005	Gaston Bridge	86943

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
Gaston Bridge	13 Oct 2005	5 Sept 2023	4
US Ford Bridge Roundabout	24 Aug 2017	24 Aug 2017	1
Ford Bridge Roundabout	20 Aug 2010	24 Aug 2017	2

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

2005–2023

Survey records by year

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

105

006

007

008

009

110

111

012

013

014

015

016

317

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 84 measured fish were spread across different length ranges.

Smallest: 5.8 cm
Lower quarter: 7.8 cm
Median: 12.5 cm
Upper quarter: 14.8 cm
Largest: 23.9 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ash (Thames)

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

European eel Chub Dace Gudgeon Roach 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 →