Ruffe · Gymnocephalus cernuus

Ruffe in the Main River Yeo

Largest measured ruffe: 12 cm

The largest ruffe measured in Environment Agency surveys of the Main River Yeo was 12 cm, recorded at Downstream Load Bridge on 10 June 1993.

Across 20 measured ruffe, the median measured length was 7 cm.

Surveyors recorded weights for 18 ruffe. The median was 0.2 oz (0.005 kg) and the largest recorded weight was 1 oz (0.028 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Main River Yeo.

See ruffe records across England →

Most recent observation10 May 2005Pibsbury Pumping Station (Te) · 1 fish

Largest measured ruffe: 12 cm
Median length: 7 cm
Fish measured: 20
Survey locations: 5

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
12 cm	10 Jun 1993	Downstream Load Bridge	79895
11.3 cm	10 Jun 1993	Downstream Load Bridge	79895
10.3 cm	10 Jun 1993	Downstream Load Bridge	79895
7.5 cm	10 Jun 1993	Downstream Load Bridge	79895
7.5 cm	10 Jun 1993	Downstream Load Bridge	79895
7.4 cm	10 Jun 1993	Downstream Load Bridge	79895
7.2 cm	10 Jun 1993	Downstream Load Bridge	79895
7.2 cm	8 Jun 1993	Downstream Ablake	79898
7.1 cm	12 May 1993	Upstream Ablake	79897
7.1 cm	12 May 1993	Upstream Ablake	79897

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
Pibsbury Pumping Station (Te)	3 Oct 2003	10 May 2005	2
Witcomb Drove	30 Jun 1993	30 Jun 1993	1
Downstream Load Bridge	10 Jun 1993	10 Jun 1993	1
Downstream Ablake	8 Jun 1993	8 Jun 1993	1
Upstream Ablake	12 May 1993	12 May 1993	1

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

1993–2005

Survey records by year

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

493

094

095

096

097

098

099

000

001

002

103

004

105

Fish measured by surveyors

Measured length distribution

See how the 20 measured fish were spread across different length ranges.

Smallest: 3.2 cm
Lower quarter: 6 cm
Median: 7.1 cm
Upper quarter: 7.4 cm
Largest: 12 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 18 ruffe. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0.1 oz (0.004 kg)
Median: 0.2 oz (0.005 kg)
Upper quarter: 0.4 oz (0.0118 kg)
Heaviest: 1 oz (0.028 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Main River Yeo

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

Gudgeon European eel Chub Roach Dace Minnow

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 →