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Title: River Calder RHS evaluation : final report
Author: C. Scott
Author: J. Wilkinson
Author: J. Ellaway
Document Type: Monograph
Young Associates was commissioned by the Environment Agency (EA), North West Region, to collect and analyse River Habitat Survey (RHS) data in order to assess the possible causes of an observed decline in salmonid fisheries quality in the River Calder system, West Cumbria. A total of 76 RHS sites were surveyed during February 1999, including the main stem and all significant tributaries of the R. Calder. The data were entered onto the RHS database by the EA and were then analysed to describe the habitat characteristics of the R. Calder, with a view to determining the possible causes of reduced salmonid densities. These results were compared against the RHS data for the adjacent River Ehen and the salmonid populations of both systems were reviewed using the results of two fisheries surveys carried out in 1993 and 1998. The results of the RHS habitat analyses were reviewed in a national context using the UK RHS database (v. 2), and the review of salmonid populations was considered in a regional context using regional fisheries data.
Publisher: Environment Agency North West Region
Publication Date: 1999
Publication Place: Tattenhall
Subject Keywords: RiversRiver habitat surveySalmon fisheriesPopulation survey
Geographic Keywords: EA North WestEhenSouth West Lakes catchment
Taxonomic Keywords: Salmonidae
Extent: 27; + figues, appendices
Total file downloads: 308

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