Perch · Perca fluviatilis

Perch in the Main River Biss

Largest measured perch: 28.2 cm

The largest perch measured in Environment Agency surveys of the Main River Biss was 28.2 cm, recorded at Upstream Yarn Brook on 16 September 1997.

Across 31 measured perch, the median measured length was 22 cm.

Surveyors recorded weights for 28 perch. The median was 6.1 oz (0.1725 kg) and the largest recorded weight was 12.7 oz (0.36 kg).

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

See perch records across England →

Most recent observation24 October 2007Ashton Hill Farm · 3 fish

Largest measured perch: 28.2 cm
Median length: 22 cm
Fish measured: 31
Survey locations: 3

Individual EA measurements

Largest measured perch

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
28.2 cm	16 Sept 1997	Upstream Yarn Brook	77047
27.5 cm	31 Jul 1997	Ashton Hill Farm	77048
26.3 cm	31 Jul 1997	Ashton Hill Farm	77048
26 cm	16 Sept 1997	Upstream Yarn Brook	77047
25.5 cm	16 Sept 1997	Upstream Yarn Brook	77047
24.7 cm	31 Jul 1997	Ashton Hill Farm	77048
24.6 cm	16 Sept 1997	Upstream Yarn Brook	77047
24 cm	31 Jul 1997	Ashton Hill Farm	77048
23.5 cm	16 Sept 1997	Upstream Yarn Brook	77047
23.5 cm	11 Sept 1997	Ladydown Mill	77050

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 surveyed	First recorded	Last recorded	Visits finding perch
Ashton Hill Farm	31 Jul 1997	24 Oct 2007	2
Upstream Yarn Brook	16 Sept 1997	16 Sept 1997	1
Ladydown Mill	11 Sept 1997	11 Sept 1997	1

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

1997–2007

Survey records by year

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

397

098

099

000

001

002

003

004

005

006

107

Fish measured by surveyors

Measured length distribution

See how the 31 measured fish were spread across different length ranges.

Smallest: 5.9 cm
Lower quarter: 13.4 cm
Median: 22 cm
Upper quarter: 23.8 cm
Largest: 28.2 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 28 perch. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 1.7 oz (0.047 kg)
Median: 6.1 oz (0.1725 kg)
Upper quarter: 8.1 oz (0.229 kg)
Heaviest: 12.7 oz (0.36 kg)

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

More fish in this river

Explore the Main River Biss

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

Bullhead Brown / sea trout Minnow Chub Dace 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 →