Rudd · Scardinius erythrophthalmus

Rudd in the River Mardyke

Largest measured rudd: 20.5 cm

The largest rudd measured in Environment Agency surveys of the River Mardyke was 20.5 cm, recorded at North Stifford on 13 May 1998.

Across 631 measured rudd, the median measured length was 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 River Mardyke.

See rudd records across England →

Most recent observation2 May 2025North Stifford · 13 fish

Largest measured rudd: 20.5 cm
Median length: 9 cm
Fish measured: 631
Survey locations: 5

Individual EA measurements

Largest measured rudd

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
20.5 cm	13 May 1998	North Stifford	14731
19.4 cm	25 Sept 2001	Grangewater	20100
18.2 cm	15 Apr 1986	Circus Tavern	14704
18 cm	14 May 1998	14 Arches Bridge	14730
17.8 cm	14 May 1998	14 Arches Bridge	14730
17.4 cm	15 May 1998	M25-A13	14729
17.1 cm	14 May 1998	14 Arches Bridge	14730
17 cm	13 May 1998	North Stifford	14731
17 cm	13 May 1998	North Stifford	14731
17 cm	15 Apr 1986	Circus Tavern	14704

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

Explore the river

Where rudd were found

Each point marks a survey location with at least one rudd 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 rudd
North Stifford	25 Mar 1992	2 May 2025	8
14 Arches Bridge	10 Feb 1989	1 May 2013	7
Grangewater	25 Sept 2001	23 Apr 2013	2
Circus Tavern	15 Apr 1986	18 May 2007	5
M25-A13	19 Mar 1986	17 May 2007	6

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

1986–2025

Survey records by year

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

286

087

088

289

090

091

392

093

094

395

096

097

498

099

000

501

002

003

004

005

006

407

008

009

010

011

012

313

014

015

016

017

018

119

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 631 measured fish were spread across different length ranges.

Smallest: 3.2 cm
Lower quarter: 5.8 cm
Median: 9 cm
Upper quarter: 12.5 cm
Largest: 20.5 cm

0–99 mm

385

100–199 mm

245

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Mardyke

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

European eel 3-spined stickleback Roach Tench Common carp Golden goldfish

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 →