RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River Ouse

Largest measured ruffe: 18.5 cm

The largest ruffe measured in Environment Agency surveys of the River Ouse was 18.5 cm, recorded at Naburn Weir (boom boat site) on 23 July 1999.

Across 352 measured ruffe, the median measured length was 7.7 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 Ouse.

See ruffe records across England →

Most recent observation12 August 2024Naburn - Fry Survey · 1 fish
Largest measured ruffe
18.5 cm
Median length
7.7 cm
Fish measured
352
Survey locations
20

Individual EA measurements

Largest measured ruffe

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
18.5 cm23 Jul 1999Naburn Weir (boom boat site)105760
18.5 cm23 Jul 1999Naburn Weir (single anode)105765
16.6 cm23 Jul 1999Naburn Weir (boom boat site)105760
16.6 cm23 Jul 1999Naburn Weir (single anode)105765
15.2 cm23 Jul 1999Naburn Weir (boom boat site)105760
15.2 cm23 Jul 1999Naburn Weir (single anode)105765
14.2 cm23 Jul 1999Naburn Weir (boom boat site)105760
14.2 cm23 Jul 1999Naburn Weir (single anode)105765
12.7 cm3 Jul 2006Naburn Weir (single anode)100164
12.7 cm20 Jul 2004Linton-on-Ouse u/s weir (gill net)81037

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 surveyedFirst recordedLast recordedVisits finding ruffe
Naburn - Fry Survey12 Aug 202412 Aug 20241
Beningbrough Village (single anode)18 Jul 20008 Jul 202414
Acaster Malbis (single anode)20 Jul 199828 Jun 20226
Acaster - Fry Survey24 Sept 198512 Aug 20194
Naburn Weir (single anode)23 Jul 199921 Jun 20187
Linton-on-Ouse, below weir (single anode)17 Jul 201417 Jul 20141
Beningborough - Fry Survey20 Sept 19841 Sept 20097
Linton-on-Ouse u/s weir (single anode)17 Jul 200020 Jul 20043
Linton-on-Ouse u/s weir (gill net)11 Jul 200220 Jul 20042
Beningbrough Village (gill net site)17 Jul 200119 Jul 20044
Acaster Malbis (gill net)20 Jul 199815 Jul 20046
Nether Poppleton (gill net site)14 Jul 200414 Jul 20041
Naburn Weir (gill net)7 Jul 200312 Jul 20042
Beningbrough Village (boom boat site)10 Jul 200310 Jul 20031
Nether Poppleton (boom boat)17 Jul 20029 Jul 20032
Nether Poppleton (single anode)17 Jul 200217 Jul 20021
Beningbrough Village (seine net site)23 Jul 199917 Jul 20012
Linton-on-Ouse u/s (seine netting site)24 Jul 199816 Jul 20013
Naburn Weir (boom boat site)23 Jul 199923 Jul 19991
Linton-on-Ouse u/s weir (boom boat)24 Jul 199824 Jul 19981

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

1984–2024

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 352 measured fish were spread across different length ranges.

Smallest
0.7 cm
Lower quarter
6.9 cm
Median
7.7 cm
Upper quarter
9.7 cm
Largest
18.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ouse

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

Roach Perch Gudgeon Bleak Pike Common bream

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 →