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Title: A report on the strategic stock assessment survey of the River Esk catchment 1994 with particular reference to salmonids
Author: A. Cruddas
Author: D.J.F. McCubbing
Document Type: Monograph
Salmon populations in the River Esk are increasing in density in the main river and are also widening their geographical distribution. Trout production occurs mainly in the tributaries where year class strength fluctuates widely. This may be due to variations in environmental conditions, notably drying up of streams. Acid rain no longer causes severe mortalities, but some areas remain fishless in the upper reaches as the streams are isolated from other fish populations which could repopulate them. The productivity of the system remains low due to the geological nature of the catchment. Liming activites have limited merit as a means of increasing production.
Publisher: National Rivers Authority
Publication Date: 1994
Publication Place: [Carlisle]
Subject Keywords: Fishery managementStock assessmentSurveysSalmonTrout
Geographic Keywords: EA North WestCumbria
Taxonomic Keywords: Salmonidae
Extent: 31; + appendices
Total file downloads: 245

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