ARAnglerRadar evidence & rules

Compare river fishing evidence · England

Same facts.
No winner score.

Choose two named waters and compare the evidence that actually exists. Survey effort, species records and freshness are shown separately because none proves access, current presence or fishing quality.

Hertfordshire and North London

Alleviation of Low Flow (ALF) study

Survey sites
4
Survey events
8
Recorded taxa
11
Evidence period
6 May 1999 – 7 Nov 2000
Sites latest within 2 years
0
Sites latest over 10 years ago
4
EA waterbody IDs
Not supplied
Access status
Not established by survey data
Thames

River Kennet

Survey sites
56
Survey events
264
Recorded taxa
31
Evidence period
28 Sept 1999 – 14 Oct 2025
Sites latest within 2 years
16
Sites latest over 10 years ago
31
EA waterbody IDs
GB106039017420 · GB106039023120 · GB106039023140 · GB106039023172
Access status
Not established by survey data

Overlap

10 recorded taxa appear in both survey sets

The site counts are shown per water. A higher count can reflect more monitoring sites, not a larger or healthier population.

  1. ChubAlleviation of Low Flow (ALF) study 1River Kennet 41Latest evidence 7 Nov 2000 · 9 Oct 2025
  2. DaceAlleviation of Low Flow (ALF) study 1River Kennet 41Latest evidence 7 Nov 2000 · 9 Oct 2025
  3. PerchAlleviation of Low Flow (ALF) study 1River Kennet 38Latest evidence 7 Nov 2000 · 9 Oct 2025
  4. BullheadAlleviation of Low Flow (ALF) study 3River Kennet 11Latest evidence 7 Nov 2000 · 14 Oct 2025
  5. MinnowAlleviation of Low Flow (ALF) study 1River Kennet 11Latest evidence 7 Nov 2000 · 14 Oct 2025
  6. Stone loachAlleviation of Low Flow (ALF) study 3River Kennet 8Latest evidence 7 Nov 2000 · 8 Oct 2025
  7. European eelAlleviation of Low Flow (ALF) study 1River Kennet 9Latest evidence 27 Jun 2000 · 8 Nov 2013
  8. Rainbow troutAlleviation of Low Flow (ALF) study 1River Kennet 8Latest evidence 14 May 1999 · 8 Oct 2024
  9. 3-spined sticklebackAlleviation of Low Flow (ALF) study 3River Kennet 4Latest evidence 7 Nov 2000 · 14 Oct 2025
  10. Pike varietiesAlleviation of Low Flow (ALF) study 2River Kennet 5Latest evidence 27 Jun 2000 · 1 Oct 2025

Only in the Alleviation of Low Flow (ALF) study survey set

  1. 10-spined stickleback1 site · latest 12 May 1999

Only in the River Kennet survey set

  1. Brown / sea trout47 sites · latest 14 Oct 2025
  2. Pike47 sites · latest 9 Oct 2025
  3. Roach36 sites · latest 8 Oct 2025
  4. Gudgeon31 sites · latest 1 Oct 2025
  5. Bleak27 sites · latest 25 Sept 2025
  6. Barbel22 sites · latest 25 Sept 2025
  7. Grayling21 sites · latest 9 Oct 2025
  8. Common bream19 sites · latest 25 Sept 2025
  9. Atlantic salmon14 sites · latest 25 Oct 2010
  10. Tench13 sites · latest 13 Nov 2024
  11. Roach x common bream hybrid12 sites · latest 25 Oct 2018
  12. Ruffe9 sites · latest 5 Nov 2022
  13. Brook lamprey7 sites · latest 14 Oct 2025
  14. Common [wild] carp5 sites · latest 24 Oct 2018
  15. European eels > elvers5 sites · latest 10 Oct 2025
  16. Mirror carp4 sites · latest 4 Nov 2008
  17. Common carp varieties3 sites · latest 22 Oct 2015
  18. Rudd3 sites · latest 4 Nov 2022
  19. Silver bream3 sites · latest 4 Nov 2022
  20. Brook lamprey > ammocoete1 site · latest 6 Oct 2023
  21. Golden goldfish1 site · latest 12 Nov 2009

Method and boundary

Comparison, not prediction.

  • SourceEnvironment Agency Ecology & Fish Data
  • LicenceOpen Government Licence v3.0
  • Source copy retrieved23 Jul 2026
  • CoordinatesNot published on this page
  • Not assertedAccess, current presence, abundance, catch prospects or safety
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