Stone loach · Barbatula barbatula

Stone loach in the River Derwent (Yorkshire) tributaries

Largest measured stone loach: 12.3 cm

The largest stone loach measured in Environment Agency surveys of the River Derwent (Yorkshire) tributaries was 12.3 cm, recorded at Low North beck on 28 August 2013.

Across 15 measured stone loach, the median measured length was 8.7 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Derwent (Yorkshire) tributaries.

See stone loach records across England →

Most recent observation30 September 2024Jugger Howe beck

Largest measured stone loach: 12.3 cm
Median length: 8.7 cm
Fish measured: 15
Survey locations: 9

Individual EA measurements

Largest measured stone loach

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
12.3 cm	28 Aug 2013	Low North beck	138493
12.1 cm	19 Sept 2012	Jugger Howe beck	133798
11.3 cm	28 Aug 2013	Low North beck	138493
11.1 cm	15 Aug 2018	Jugger Howe beck	153203
10.3 cm	19 Sept 2012	Jugger Howe beck	133798
9.8 cm	28 Aug 2013	Low North beck	138493
9.8 cm	19 Sept 2012	Jugger Howe beck	133798
8.7 cm	15 Aug 2018	Low North beck	153205
8.7 cm	15 Aug 2018	Low North beck	153205
8.5 cm	19 Sept 2012	Jugger Howe beck	133798

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

Explore the river

Where stone loach were found

Each point marks a survey location with at least one stone loach 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 stone loach
Jugger Howe beck	10 Sept 1997	30 Sept 2024	5
Low North beck	10 Sept 1997	15 Aug 2018	4
Scampston beck	29 Aug 2012	29 Aug 2012	1
Old course of Derwent	13 Sept 2005	13 Sept 2005	1
Barlam Beck, Barlam Bridge DERBT34	2 Jul 2002	2 Jul 2002	1
Spital Beck, Barton Bridge DERBT33	1 Jul 2002	1 Jul 2002	1
Settrington Beck, d/s Marr House DERBT30	1 Jul 2002	1 Jul 2002	1
Menethorpe Beck upstream road bridge.	1 Jul 2002	1 Jul 2002	1
Cram Beck downstream A64 DERBT32	1 Jul 2002	1 Jul 2002	1

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

1997–2024

Survey records by year

Each bar shows how many survey visits recorded stone loach that year.

297

098

099

000

001

502

003

004

105

206

007

008

009

010

011

212

113

014

015

016

017

218

019

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 15 measured fish were spread across different length ranges.

Smallest: 4.6 cm
Lower quarter: 8.2 cm
Median: 8.7 cm
Upper quarter: 10.7 cm
Largest: 12.3 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Derwent (Yorkshire) tributaries

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

Brown / sea trout Bullhead Minnow 3-spined stickleback Dace Pike

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 →