Durance, I.; Feeley, H.B.; Pye, M.C.; Gutierrez-Canovas, C.; Ormerod, S.J.; Woodward, G.

Fish species and production in Welsh rivers along a biodiversity gradient (2012 - 2013)

This dataset consists of fish species, fish length and fish weight from samples taken from small and medium catchments across Wales. Samples were collected in the summers and autumns of 2012 and 2013 using electrofishing. All the collected individuals were counted and recorded to represent the fish diversity and abundance of each sampling site and date. The main goal of this survey was to relate fish production with a gradient of aquatic biodiversity associated with different environmental settings (land-use intensify, recovery from acidification).

Dr Isabelle Durance was responsible for organising the surveys, Dr Hugh Feeley was in charge of collecting, sorting and measuring the fish samples. The work was carried out under the Diversity in Upland Rivers for Ecosystem Service Sustainability (DURESS) project (Grant reference NERC NE/J014818/1). DURESS was a project funded by the Natural Environment Research Council (NERC) Biodiversity and Ecosystem Service Sustainability (BESS) programme.

Publication date: 2017-04-21

Get the data

This dataset is made available under the terms of the Open Government Licence

Format of the dataset : Comma-separated values (CSV)

You must cite: Durance, I.; Feeley, H.B.; Pye, M.C.; Gutierrez-Canovas, C.; Ormerod, S.J.; Woodward, G. (2017). Fish species and production in Welsh rivers along a biodiversity gradient (2012 - 2013). NERC Environmental Information Data Centre. https://doi.org/10.5285/57f95ff8-e1b0-41b9-866a-feb231aecb67


© Cardiff University

© Imperial College London


Study area

Provenance & quality

Fish populations at the study sites were surveyed during a stable base-flow period from June to September 2012 and in July and September 2013. Fish samples were collected by electrofishing in representative 30 metre reaches that were enclosed with stop nets Fish caught during each pass were transferred immediately to a holding container containing stream water. After each pass, individuals were identified to species, weighed to the nearest gram using an electronic balance and fork length (FL) measured to the nearest millimetre was recorded. The mass of some individuals could not be accurately determined in the field. For these fish, mass was estimated using a length-mass regression, based on the 2012 observed data. (Details in supporting documentation).

Results were recorded in the field and results transferred into an Excel spreadsheet. Data was exported to a comma separated file for ingestion into the Environmental Information Data Centre (EIDC).

Supplemental information

Other useful information regarding this dataset:

Beaumont W.R.C. (2011) Electric Fishing: A Complete Guide to Theory and Practice. Game & Wildlife Conservation Trust, Fordingbridge, Hampshire.
Kruse C.G., Hubert W.A. & Rahel F.J. (1998) Single-pass electrofishing predicts trout abundance in mountain streams with sparse habitat. North American Journal of Fisheries Management, 18, 940-946.
Maitland P.S. (1972) A key to the freshwater fishes of the British Isles. Scientific Publication of the Freshwater Biological Association, 27, 1-137.

Correspondence/contact details

Dr Isabelle Durance
Cardiff University
Sir Martin Evans Building, Museum Avenue
CF10 3AX
United Kingdom


Durance, I.
Cardiff University
Feeley, H.B.
Cardiff University
Pye, M.C.
Cardiff University
Gutierrez-Canovas, C.
Cardiff University
Ormerod, S.J.
Cardiff University
Woodward, G.
Imperial College London

Other contacts

Environmental Information Data Centre
NERC Environmental Information Data Centre

Additional metadata

Topic categories
Biota , Environment
acidity,  Atlantic salmon,  benthic community,  Brown Trout,  DURESS,  land-use,  Salmo trutta
Environmental Monitoring Facilities
Spatial representation type
Tabular (text)
Last updated