RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River Desborough Island

Largest measured ruffe: 12 cm

The largest ruffe measured in Environment Agency surveys of the River Desborough Island was 12 cm, recorded at Desborough Island Downstream Fry on 22 September 2006.

Across 43 measured ruffe, the median measured length was 6.5 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 Desborough Island.

See ruffe records across England →

Most recent observation21 August 2014Desborough Island Downstream Fry · 24 fish
Largest measured ruffe
12 cm
Median length
6.5 cm
Fish measured
43
Survey locations
3

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
12 cm22 Sept 2006Desborough Island Downstream Fry111970
10.7 cm22 Sept 2006Desborough Island Downstream Fry111970
10.4 cm22 Aug 2007Desborough Island 10C108636
10.3 cm22 Aug 2007Desborough Island 10C108636
10.2 cm22 Aug 2007Desborough Island 10C108636
10.1 cm22 Aug 2007Desborough Island 10C108636
10 cm22 Aug 2007Desborough Island 10C108636
9.9 cm22 Aug 2007Desborough Island 10C108636
9.8 cm22 Aug 2007Desborough Island 10C108636
9.8 cm22 Aug 2007Desborough Island 10C108636

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
Desborough Island Downstream Fry22 Sept 200621 Aug 20144
Desborough Island Upstream Fry22 Aug 200728 Aug 20133
Desborough Island 10C22 Aug 200722 Aug 20071

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

2006–2014

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 43 measured fish were spread across different length ranges.

Smallest
3.6 cm
Lower quarter
5.6 cm
Median
6.5 cm
Upper quarter
9.7 cm
Largest
12 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Desborough Island

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

Roach Perch Dace Chub Bleak 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 →