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Title: River Ray, Wiltshire : fisheries survey 1989
Author: National Rivers Authority Thames Region
Document Type: Monograph
Four sites were surveyed by electrofishing in River Ray during September and October 1989. The upper section from the source to Swindon Sewage Treatment Works (S.T.W) (9km) is effectively a small stream with low basal flow and is a non-viable fishery. The section immediately below Swindon S.T.W. (0.5km) supports a healthy population of mixed coarse fish. The section from 0.5km below Swindon S.T.W. to the Haydon Wick Brook (3.7km) supports a very poor fish population with only dace being present. The lower section from the Haydon Wick Brook to the River Thames confluence (7.8km) supports a poor population of mixed coarse fish. Aggregated fish populations are present at sites with the capacity for instream re-aeration. This section is an E.C. designated cyprinid fishery and it is estimated that 80% of this section does not achieve its target biomass.
Publisher: National Rivers Authority
Publication Date: 1989
Publication Place: Reading
Subject Keywords: RiversRiver fisheriesFishesSurveysPopulation surveyBiomass
Geographic Keywords: EA South EastWiltshireVale of White Horse catchment
Taxonomic Keywords: Cyprinidae
Extent: 40; + appendices
Total file downloads: 43

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