Bleak · Alburnus alburnus

Bleak in the River Delph

Largest measured bleak: 15.8 cm

The largest bleak measured in Environment Agency surveys of the River Delph was 15.8 cm, recorded at Jolly Bankers Bridge on 11 June 1993.

Across 628 measured bleak, the median measured length was 10.8 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 Delph.

See bleak records across England →

Most recent observation11 June 2009Welches Dam · 5 fish

Largest measured bleak: 15.8 cm
Median length: 10.8 cm
Fish measured: 628
Survey locations: 8

Individual EA measurements

Largest measured bleak

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
15.8 cm	11 Jun 1993	Jolly Bankers Bridge	29663
14.8 cm	7 Aug 1997	Earith	29671
14.8 cm	25 Jul 1997	Welches Dam	29674
14.8 cm	11 Jun 1993	Jolly Bankers Bridge	29663
14.3 cm	5 Aug 1997	Sutton Gault Bridge	29673
14.3 cm	24 Jul 1997	Welney Bridge	29675
14.3 cm	24 Jul 1997	Welney Bridge	29675
14.3 cm	24 Jul 1997	Welney Bridge	29675
14.3 cm	22 Jul 1997	Old Hundred Farm	29677
14.3 cm	22 Jul 1997	Old Hundred Farm	29677

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where bleak were found

Each point marks a survey location with at least one bleak 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 bleak
Welches Dam	29 Jun 1993	11 Jun 2009	4
Welmore Lake Sluice	2 Jun 2003	12 Oct 2005	2
Welney Bridge	24 Jul 1997	11 Oct 2005	2
Earith	13 Dec 1988	21 May 2003	4
Sutton Gault Bridge	14 Dec 1988	5 Aug 1997	2
Jolly Bankers Bridge	16 Dec 1988	29 Jul 1997	3
Old Hundred Farm	22 Jul 1997	22 Jul 1997	1
Mepal Bridge	21 Dec 1988	22 Jun 1993	2

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

1988–2009

Survey records by year

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

488

089

090

091

092

493

094

095

096

697

098

099

000

001

002

303

004

205

006

007

008

109

Fish measured by surveyors

Measured length distribution

See how the 628 measured fish were spread across different length ranges.

Smallest: 5.8 cm
Lower quarter: 9.8 cm
Median: 10.8 cm
Upper quarter: 12.8 cm
Largest: 15.8 cm

0–99 mm

212

100–199 mm

416

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Delph

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

Perch Roach Pike Rudd Common bream Ruffe

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 →