RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the South Forty Foot Drain

Largest measured ruffe: 14.5 cm

The largest ruffe measured in Environment Agency surveys of the South Forty Foot Drain was 14.5 cm, recorded at Swineshead Bridge Downstream on 18 August 2005.

Across 624 measured ruffe, the median measured length was 7.1 cm.

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

See ruffe records across England →

Most recent observation24 May 2016Swineshead Bridge Downstream · 14 fish
Largest measured ruffe
14.5 cm
Median length
7.1 cm
Fish measured
624
Survey locations
10

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
14.5 cm18 Aug 2005Swineshead Bridge Downstream86969
13.9 cm23 May 2013Side Scan validiation netting136290
13.4 cm24 Aug 2005Wyberton Bridge Upstream87606
13.2 cm12 Sept 2012Donington Bridge133476
13.2 cm28 Sept 2009Wyberton Bridge Upstream119331
13.1 cm21 Aug 2006Bicker Fen100979
13.1 cm24 Aug 2005Wyberton Bridge Upstream87606
13 cm22 Oct 2003Donington Bridge78500
12.9 cm21 Aug 2006Bicker Fen100979
12.9 cm18 Aug 2005Swineshead Bridge Downstream86969

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
Swineshead Bridge Downstream14 Jul 198724 May 201613
Side Scan validiation netting23 May 201323 May 20131
Wyberton Bridge Upstream26 Jul 199520 Sept 201212
Hubberts Bridge R/B Upstream15 Jul 198719 Sept 20129
Bicker Fen30 Jun 198713 Sept 201211
Donington Bridge29 Jun 199512 Sept 20128
Dowsby Road16 Jun 19875 Sept 20064
Upstream Rod Rest10 Jul 199026 Jul 19993
Downstream AWA Wyberton Labortory16 Aug 199516 Aug 19951
Swineshead Bridge1 Jul 19873 Jul 19953

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

1987–2016

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 624 measured fish were spread across different length ranges.

Smallest
3.5 cm
Lower quarter
6 cm
Median
7.1 cm
Upper quarter
8.5 cm
Largest
14.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the South Forty Foot Drain

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

Perch Roach Pike Common bream Silver bream 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 →