Alleviation of Low Flow (ALF) study
11 fish species have been recorded at 4 locations along the Alleviation of Low Flow (ALF) study.
- Fish species
- 11
- Places surveyed
- 4
- Survey visits
- 8
- Records span
- 1999–2000
Local EA evidence
Where fish were recorded
Choose a point on the map to see what was recorded there.
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River conditions
Environment Agency evidence
Fish found in this river
Open a linked fish for detailed measurements, or use the map filter above to compare survey locations.
| Fish | Sites | Most recent | Fish counted | Measured length | Measured weight |
|---|---|---|---|---|---|
| BullheadCottus gobio | 3 | 2000 | 153 | Median: 7.1 cm153 fish measuredLargest measured bullhead: 12.4 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 3 | 2000 | 113 | Median: 4.7 cm113 fish measuredLargest measured 3-spined stickleback: 6.5 cm | — |
| Stone loachBarbatula barbatula | 3 | 2000 | 142 | Median: 7.9 cm142 fish measuredLargest measured stone loach: 12.4 cm | — |
| PikeEsox lucius | 2 | 2000 | 7 | Median: 23 cm7 fish measuredLargest measured pike: 57 cm | — |
| MinnowPhoxinus phoxinus | 1 | 2000 | 279 | Median: 4.4 cm279 fish measuredLargest measured minnow: 7.4 cm | — |
| PerchPerca fluviatilis | 1 | 2000 | 5 | Median: 13.1 cm5 fish measuredLargest measured perch: 16.5 cm | — |
| European eelAnguilla anguilla | 1 | 2000 | 4 | Recorded length: 70 cm1 fish measured | — |
| 10-spined sticklebackPungitius pungitius | 1 | 1999 | 77 | Median: 4.5 cm77 fish measuredLargest measured 10-spined stickleback: 5.7 cm | — |
| ChubLeuciscus cephalus | 1 | 2000 | 5 | Median: 19.3 cm5 fish measuredLargest measured chub: 45.6 cm | — |
| DaceLeuciscus leuciscus | 1 | 2000 | 2 | Median: 20.2 cm2 fish measuredLargest measured dace: 21.3 cm | — |
| Rainbow troutOncorhynchus mykiss | 1 | 1999 | 1 | Recorded length: 41.6 cm1 fish measured | — |
EA surveys have recorded these fish at particular sites and times. Absence from a survey is not evidence that a species is absent from the river. Every valid individual length and weight is retained, with its sample size shown.
Useful context
This page follows survey locations along the main Alleviation of Low Flow (ALF) study. Tributaries and unrelated rivers with similar names are kept separate.
The map shows past fish records, not fishing access or a promise of what you’ll catch today.
How RiverFish handles the data →