Perch · Perca fluviatilis

Perch in the River Idle

Largest measured perch: 39.5 cm

The largest perch measured in Environment Agency surveys of the River Idle was 39.5 cm, recorded at Eaton on 2 May 2014.

Across 257 measured perch, the median measured length was 14.3 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 Idle.

See perch records across England →

Most recent observation23 August 2024Bawtry · 1 fish

Largest measured perch: 39.5 cm
Median length: 14.3 cm
Fish measured: 257
Survey locations: 10

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
39.5 cm	2 May 2014	Eaton	140863
37.6 cm	17 May 2010	Eaton	121689
36.4 cm	13 May 2009	Eaton	119504
36.2 cm	2 May 2014	Eaton	140863
35.6 cm	16 Mar 2000	Gamston	23526
35.5 cm	13 May 2009	Eaton	119504
35.3 cm	9 Jun 2008	Eaton	111312
34.6 cm	13 May 2009	Eaton	119504
34.1 cm	9 Jun 2008	Eaton	111312
34 cm	6 Sept 2007	Eaton	107742

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
Bawtry	28 Jan 1983	23 Aug 2024	12
Chain Bridge Lane	8 Mar 2000	21 Aug 2024	10
Mattersey Priory	27 Sept 1990	13 Apr 2017	12
Tiln	7 Mar 2000	11 Apr 2017	4
Eaton	16 Mar 2000	11 Apr 2017	11
Idle Valley Nature Reserve	2 Jul 2012	2 Jul 2012	1
Haxey Gate	12 May 1995	5 Sept 2006	4
Misterton Soss	12 May 1995	13 Sept 2004	2
Misson	3 Nov 2003	3 Nov 2003	1
Gamston	16 Mar 2000	21 Oct 2003	2

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

1983–2024

Survey records by year

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

283

084

085

086

087

088

089

190

091

192

093

094

295

096

097

098

099

500

001

402

403

404

505

406

407

208

409

310

111

112

013

514

015

016

517

018

019

020

021

022

023

224

Fish measured by surveyors

Measured length distribution

See how the 257 measured fish were spread across different length ranges.

Smallest: 3 cm
Lower quarter: 9.5 cm
Median: 14.3 cm
Upper quarter: 18.9 cm
Largest: 39.5 cm

0–99 mm

100–199 mm

126

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Idle

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

European eel Roach Pike Chub Gudgeon Bleak

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 →