Brook lamprey · Lampetra planeri

Brook lamprey in the Bourne Rivulet

Largest measured brook lamprey: 18.5 cm

The largest brook lamprey measured in Environment Agency surveys of the Bourne Rivulet was 18.5 cm, recorded at The Island on 19 April 2006.

Across 170 measured brook lamprey, the median measured length was 14 cm.

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

See brook lamprey records across England →

Most recent observation26 September 2013The Island · 4 fish

Largest measured brook lamprey: 18.5 cm
Median length: 14 cm
Fish measured: 170
Survey locations: 6

Individual EA measurements

Largest measured brook lamprey

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
18.5 cm	19 Apr 2006	The Island	90672
17 cm	19 Apr 2006	The Island	90672
17 cm	19 Apr 2006	The Island	90672
17 cm	19 Apr 2006	The Island	90672
16.6 cm	20 Apr 2006	Hurstbourne	90668
16.5 cm	20 Apr 2006	100m d/s Ironbridge	90669
16.5 cm	19 Apr 2006	DS The Parallel	90673
16.5 cm	19 Apr 2006	DS The Parallel	90673
16.5 cm	19 Apr 2006	The Island	90672
16.5 cm	19 Apr 2006	The Island	90672

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

Explore the river

Where brook lamprey were found

Each point marks a survey location with at least one brook lamprey 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 brook lamprey
The Island	19 Apr 2006	26 Sept 2013	2
Hurstbourne	20 Apr 2006	20 Apr 2006	1
100m d/s Ironbridge	20 Apr 2006	20 Apr 2006	1
DS The Parallel	19 Apr 2006	19 Apr 2006	1
Vitacress Western Fork	18 Apr 2006	18 Apr 2006	1
Vitacress Eastern Fork effluent channel	18 Apr 2006	18 Apr 2006	1

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

2006–2013

Survey records by year

Each bar shows how many survey visits recorded brook lamprey that year.

606

007

008

009

010

011

012

113

Fish measured by surveyors

Measured length distribution

See how the 170 measured fish were spread across different length ranges.

Smallest: 9 cm
Lower quarter: 13 cm
Median: 14 cm
Upper quarter: 15 cm
Largest: 18.5 cm

0–99 mm

100–199 mm

167

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Bourne Rivulet

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

Bullhead Brown / sea trout European eel 3-spined stickleback

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 →