RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Pant (Main Reaches)

Largest measured brook lamprey: 17.8 cm

The largest brook lamprey measured in Environment Agency surveys of the River Pant (Main Reaches) was 17.8 cm, recorded at Robjohns Farm on 30 August 2017.

Across 18 measured brook lamprey, the median measured length was 16.2 cm.

Surveyors recorded weights for 15 brook lamprey. The median was 0.3 oz (0.0096 kg) and the largest recorded weight was 0.7 oz (0.02 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 Pant (Main Reaches).

See brook lamprey records across England →

Most recent observation14 September 2023Robjohns Farm · 2 fish
Largest measured brook lamprey
17.8 cm
Median length
16.2 cm
Fish measured
18
Survey locations
2

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.

LengthSurvey dateSurvey locationSurvey ID
17.8 cm30 Aug 2017Robjohns Farm152424
17.8 cm16 Aug 2011Robjohns Farm127499
17.6 cm30 Aug 2017Robjohns Farm152424
17.5 cm2 Sept 2002Robjohns Farm61940
17.3 cm30 Aug 2017Robjohns Farm152424
17.2 cm30 Aug 2017Robjohns Farm152424
17.1 cm30 Aug 2017Robjohns Farm152424
16.7 cm30 Aug 2017Robjohns Farm152424
16.3 cm30 Aug 2017Robjohns Farm152424
16.2 cm30 Aug 2017Robjohns Farm152424

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 surveyedFirst recordedLast recordedVisits finding brook lamprey
Robjohns Farm2 Sept 200214 Sept 20235
Bovington Hall23 Mar 199023 Mar 19901

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

1990–2023

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 18 measured fish were spread across different length ranges.

Smallest
13.7 cm
Lower quarter
15.4 cm
Median
16.3 cm
Upper quarter
17.3 cm
Largest
17.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 15 brook lamprey. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.2 oz (0.006 kg)
Lower quarter
0.3 oz (0.0077 kg)
Median
0.3 oz (0.0096 kg)
Upper quarter
0.4 oz (0.011 kg)
Heaviest
0.7 oz (0.02 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 Pant (Main Reaches)

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

Dace Roach Minnow Chub Gudgeon Brown / sea trout

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 →