Ruffe · Gymnocephalus cernuus

Ruffe in the River Yarrow

Largest measured ruffe: 12.5 cm

The largest ruffe measured in Environment Agency surveys of the River Yarrow was 12.5 cm, recorded at Birkacre on 28 June 2004.

Across 14 measured ruffe, the median measured length was 7.6 cm.

Surveyors recorded weights for 12 ruffe. The median was 0.2 oz (0.006 kg) and the largest recorded weight was 0.4 oz (0.012 kg).

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

See ruffe records across England →

Most recent observation30 May 2008ptc Black Brook (Hoggs Lane) · 1 fish

Largest measured ruffe: 12.5 cm
Median length: 7.6 cm
Fish measured: 14
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.

Length	Survey date	Survey location	Survey ID
12.5 cm	28 Jun 2004	Birkacre	83310
9.8 cm	30 May 2008	ptc Black Brook (Hoggs Lane)	112195
9 cm	23 Aug 2002	Upstream Blindhurst Bridge	79641
8 cm	23 Aug 2002	Upstream Blindhurst Bridge	79641
7.9 cm	23 Aug 2002	Upstream Blindhurst Bridge	79641
7.8 cm	23 Aug 2002	Upstream Blindhurst Bridge	79641
7.7 cm	23 Aug 2002	Upstream Blindhurst Bridge	79641
7.5 cm	23 Aug 2002	Upstream Blindhurst Bridge	79641
7.1 cm	23 Aug 2002	Upstream Blindhurst Bridge	79641
7.1 cm	25 Jun 2002	Upstream Blindhurst Bridge	79639

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
ptc Black Brook (Hoggs Lane)	30 May 2008	30 May 2008	1
Birkacre	28 Jun 2004	28 Jun 2004	1
Upstream Blindhurst Bridge	25 Jun 2002	23 Aug 2002	2

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

2002–2008

Survey records by year

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

202

003

104

005

006

007

108

Fish measured by surveyors

Measured length distribution

See how the 14 measured fish were spread across different length ranges.

Smallest: 4.5 cm
Lower quarter: 6.7 cm
Median: 7.6 cm
Upper quarter: 8 cm
Largest: 12.5 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 12 ruffe. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.002 kg)
Lower quarter: 0.1 oz (0.004 kg)
Median: 0.2 oz (0.006 kg)
Upper quarter: 0.3 oz (0.008 kg)
Heaviest: 0.4 oz (0.012 kg)

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

More fish in this river

Explore the River Yarrow

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

Brown / sea trout European eel Chub Gudgeon Perch Dace

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 →