Ruffe · Gymnocephalus cernuus

Ruffe in the River Upper Ouse

Largest measured ruffe: 14.8 cm

The largest ruffe measured in Environment Agency surveys of the River Upper Ouse was 14.8 cm, recorded at Emberton Park on 24 November 1988.

Across 361 measured ruffe, the median measured length was 9.3 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 Upper Ouse.

See ruffe records across England →

Most recent observation4 September 2017Newport Pagnell · 2 fish

Largest measured ruffe: 14.8 cm
Median length: 9.3 cm
Fish measured: 361
Survey locations: 26

Individual EA measurements

Largest measured ruffe

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
14.8 cm	24 Nov 1988	Emberton Park	28882
14.3 cm	26 Oct 1988	Sherrington	28880
14.3 cm	15 Jul 1988	DS Passenham Weir	28823
13.8 cm	13 Oct 1994	Carlton	28926
13.8 cm	24 Oct 1991	Sherrington	28898
13.8 cm	9 Aug 1988	Mount Mill Farm	28819
13.3 cm	13 Oct 1994	Carlton	28926
13.3 cm	13 Oct 1988	Lavendon Mill	28884
13 cm	19 May 2003	Wolverton Mill	75958
12.8 cm	25 Oct 1991	Newport Pagnell	28905

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

Explore the river

Where ruffe were found

Each point marks a survey location with at least one ruffe 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 ruffe
Newport Pagnell	15 Nov 1988	4 Sept 2017	8
Thornborough Mill	24 Apr 1997	10 Oct 2016	6
Passenham	14 Jul 1988	2 Aug 2013	10
Old Stratford	27 Jun 1988	30 Jul 2013	5
Lavendon Mill	13 Oct 1988	2 Sept 2011	6
Ravenstone Mill	1 Nov 1988	5 Aug 2010	4
Clifton Reynes	27 Jul 2010	27 Jul 2010	1
Wolverton Mill	5 Aug 1988	14 May 2009	8
DS Passenham Weir	15 Jul 1988	17 Apr 2008	3
Turvey	26 Sept 2001	5 Oct 2007	4
Odell	4 Oct 2007	4 Oct 2007	1
Stoke Mill Sharnbrook	3 Sept 2004	3 Sept 2004	1
Sherrington	26 Oct 1988	23 Oct 1997	4
Emberton Park	24 Nov 1988	16 Oct 1997	4
Clapham	3 Mar 1992	28 Oct 1994	2
Felmersham	19 Oct 1988	27 Oct 1994	3
Carlton	18 Oct 1988	13 Oct 1994	3
Newton Blossomville	17 Oct 1988	11 Oct 1994	2
Queens Park Bedford	2 Mar 1992	2 Mar 1992	1
Mill Farm Gayhurst	2 Aug 1988	22 Aug 1991	2
Mill Farm	30 Jun 1988	18 Jul 1991	2
Kempston Mill	25 Nov 1988	25 Nov 1988	1
Harrold Country Park	14 Nov 1988	14 Nov 1988	1
Radwell / Bletsoe	20 Oct 1988	20 Oct 1988	1
Mount Mill Farm	9 Aug 1988	9 Aug 1988	1
US Mill Farm	28 Jun 1988	28 Jun 1988	1

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

1988–2017

Survey records by year

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

1988

089

090

891

392

193

994

095

096

797

098

099

000

201

202

103

504

105

306

607

508

309

410

111

012

313

014

015

116

117

Fish measured by surveyors

Measured length distribution

See how the 361 measured fish were spread across different length ranges.

Smallest: 4.4 cm
Lower quarter: 7.8 cm
Median: 9.3 cm
Upper quarter: 10.3 cm
Largest: 14.8 cm

0–99 mm

246

100–199 mm

115

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Upper Ouse

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

Pike Perch Dace Roach Chub Gudgeon

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 →