Bleak · Alburnus alburnus

Bleak in the Broxbourne Mill Stream

Largest measured bleak: 10.4 cm

The largest bleak measured in Environment Agency surveys of the Broxbourne Mill Stream was 10.4 cm, recorded at Carthagena Fisheries on 22 September 2006.

Across 23 measured bleak, the median measured length was 5.6 cm.

Surveyors recorded one individual weight: 0.1 oz (0.004 kg).

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

See bleak records across England →

Most recent observation29 July 2009Carthagena Fisheries · 6 fish

Largest measured bleak: 10.4 cm
Median length: 5.6 cm
Fish measured: 23
Survey locations: 1

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
10.4 cm	22 Sept 2006	Carthagena Fisheries	101464
9.8 cm	23 Sept 2005	Carthagena Fisheries	87112
9.5 cm	23 Sept 2005	Carthagena Fisheries	87112
9.5 cm	23 Sept 2005	Carthagena Fisheries	87112
9.1 cm	23 Sept 2005	Carthagena Fisheries	87112
8.8 cm	29 Sept 2003	Carthagena Fisheries	77293
6.8 cm	5 Nov 2002	Carthagena Fisheries	72707
6.3 cm	29 Jul 2009	Carthagena Fisheries	118228
6 cm	29 Jul 2009	Carthagena Fisheries	118228
5.9 cm	29 Sept 2003	Carthagena Fisheries	77293

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
Carthagena Fisheries	5 Nov 2002	29 Jul 2009	5

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

2002–2009

Survey records by year

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

102

103

004

105

106

007

008

109

Fish measured by surveyors

Measured length distribution

See how the 23 measured fish were spread across different length ranges.

Smallest: 4.5 cm
Lower quarter: 5.3 cm
Median: 5.6 cm
Upper quarter: 7.8 cm
Largest: 10.4 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 0.1 oz (0.004 kg)

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

More fish in this river

Explore the Broxbourne Mill Stream

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

Perch Roach Pike Tench

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 →