Historic monitoring evidence · Environment Agency
Gunnislake Weir Index River Fish Trap
Devon and Cornwall and the Isles of Scilly · survey site
This page records ecological survey evidence. It is not proof of current fish presence, abundance, fishing quality, access, permission or safety at this location.
Observed taxa
What monitoring recorded here
Taxa are ordered by latest survey date. Counts and records reflect monitoring events, not an angling forecast.
Brown / sea trout
Salmo trutta- First record
- 22 May 1986
- Latest record
- 11 Dec 2018
- Survey events
- 1767
Atlantic salmon
Salmo salar- First record
- 20 May 1986
- Latest record
- 4 Dec 2018
- Survey events
- 1735
Grayling
Thymallus thymallus- First record
- 4 May 2012
- Latest record
- 4 Dec 2018
- Survey events
- 12
Dace
Leuciscus leuciscus- First record
- 5 Jun 2011
- Latest record
- 12 Nov 2018
- Survey events
- 60
Perch
Perca fluviatilis- First record
- 27 Aug 2015
- Latest record
- 17 Oct 2018
- Survey events
- 4
European eel
Anguilla anguilla- First record
- 5 Jun 2011
- Latest record
- 27 Jun 2018
- Survey events
- 14
Allis shad
Alosa alosa- First record
- 14 Jun 2011
- Latest record
- 26 Jun 2018
- Survey events
- 9
Sea lamprey
Petromyzon marinus- First record
- 12 Jun 2011
- Latest record
- 19 Jun 2018
- Survey events
- 57
Roach
Rutilus rutilus- First record
- 22 May 2012
- Latest record
- 23 May 2018
- Survey events
- 6
Common bream
Abramis brama- First record
- 29 May 2013
- Latest record
- 21 Jun 2016
- Survey events
- 2
Brook lamprey
Lampetra planeri- First record
- 15 Dec 2013
- Latest record
- 15 Dec 2013
- Survey events
- 1
Rules and access
Check before you travel.
Environment Agency ecology records do not carry fishing-rights boundaries or live restrictions. Confirm the fishery owner, permission, local byelaws, seasonal rules, safety notices and current conditions before setting out.
Check live freshwater fishing rulesProvenance
Source, licence and boundary
- SourceEnvironment Agency Ecology & Fish Data
- LicenceOpen Government Licence v3.0
- Source copy retrieved23 Jul 2026
- Terms checked23 Jul 2026
- CoverageHistoric monitoring evidence, separately dated per record
- Not assertedCurrent presence, access, permission, fishing quality or safety