Title: A report on the 1992 strategic stock assessment survey of the upper Eden catchment with particular reference to salmonids
Author: J.K. Atkins
Document Type: Monograph
Abstract:
Under the Water Resources Act, 1991, the N.R.A, has a responsibility to maintain, improve and develop fisheries. In order to help accomplish this the N.R.A, is collecting baseline data on fish populations. A strategic survey programme has been established with
the primary aim of assessing juvenile salmonid populations using electrofishing methods. Salmonid fish include salmon (Salmo salar) and both the migratory and residential forms of the trout (Salmo trutta). The survey was targeted at young salmonids (normally less
than 2 years old) by selecting sites with a riffle/pool structure. The deeper waters associated with larger trout were not surveyed as available methods are not effective. Consequently results for older trout populations should be interpreted with caution. Strategic surveys are being conducted throughout the N.R.A, and surveys have been conducted concurrently throughout Cumbria. The strategic survey is designed to be a rolling programme initially surveying new catchments or parts of catchments each year. It is expected to take 8 years to complete the cycle on the Eden and Border Esk due to the large size of their catchments. For the purposes of this survey the Upper Eden was defined as the area of catchment from Crowdundle Beck which flows in the Eden a short distance downstream of the A66 near Temple Sowerby. The survey area is shown on two maps, Figures A and B.
Publisher: National Rivers Authority
Publication Date: 1994
Publication Place: Carlisle
Subject Keywords: Fishery management; Stock assessment; Surveys
Geographic Keywords: EA North West; Cumbria; Eden (river, Cumbria); Eden and Esk catchment
Taxonomic Keywords: Salmonidae
Extent: 25; + appendices
Permalink: http://www.environmentdata.org/archive/ealit:3321
Total file downloads: 291
Download PDF Display PDF in separate tab
