RiverFish

Perch · Perca fluviatilis

Perch in the River Lostock

Largest measured perch: 21.9 cm

The largest perch measured in Environment Agency surveys of the River Lostock was 21.9 cm, recorded at Havelock Road on 24 August 2001.

Across 71 measured perch, the median measured length was 8.2 cm.

Surveyors recorded weights for 8 perch. The median was 0.4 oz (0.01 kg) and the largest recorded weight was 3.3 oz (0.094 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 Lostock.

See perch records across England →

Most recent observation5 July 2023Cowling lane · 1 fish
Largest measured perch
21.9 cm
Median length
8.2 cm
Fish measured
71
Survey locations
13

Individual EA measurements

Largest measured perch

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
21.9 cm24 Aug 2001Havelock Road90168
18.5 cm22 Mar 1995Lostock Bridge at Croston115405
18 cm5 Apr 1995Lostock Bridge Farm112903
18 cm24 Mar 1995Mill Lane112829
17.5 cm24 Mar 1995Mill Lane112829
16 cm24 Mar 1995Mill Lane112829
15.7 cm25 Jul 2018Mill Lane152970
15.6 cm22 Jun 2004Havelock Road83186
15.5 cm19 Jul 2005Mill Lane87763
15.5 cm22 Mar 1995Lostock Bridge at Croston115405

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

Explore the river

Where perch were found

Each point marks a survey location with at least one perch 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 perch
Cowling lane4 Aug 20055 Jul 20233
Mill Lane24 Mar 199525 Jul 20185
Below Farrington Weir25 Jul 201825 Jul 20181
Havelock Road24 Aug 200122 Jun 20042
Lower Copthurst22 Jun 19996 Sept 20032
Kem Mill Lane22 Jun 19996 Sept 20032
Below STW outfall19 Jul 200019 Jul 20001
Above STW outfall19 Jul 200019 Jul 20001
Sheep Hill Lane20 May 199920 May 19991
Lostock Bridge Farm5 Apr 199528 Jul 19952
500m Above Ulnes Walton Bridge28 Jul 199528 Jul 19951
Earnshaw Bridge24 Jul 199524 Jul 19951
Lostock Bridge at Croston22 Mar 199522 Mar 19951

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

1995–2023

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 71 measured fish were spread across different length ranges.

Smallest
4.5 cm
Lower quarter
7 cm
Median
8.2 cm
Upper quarter
12.8 cm
Largest
21.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 8 perch. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.002 kg)
Lower quarter
0.2 oz (0.0055 kg)
Median
0.4 oz (0.01 kg)
Upper quarter
1.3 oz (0.0375 kg)
Heaviest
3.3 oz (0.094 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 Lostock

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

European eel Chub Roach Gudgeon Dace Flounder

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 →