Unknown
National Rivers Authority North West
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Preston, UK
In:
http://aquaticcommons.org/id/eprint/8079
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1256
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2012-02-17 13:42:01
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8079
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Environment Agency, UK (Freshwater Biological Association)
Publication Date:
2021-06-28
Description:
In October 1992, a fish population survey of the Swanside Beck system revealed that the densities of juvenile salmon present in the beck were generally poor. The survey highlighted that a potential reason for this may be due to a lack of spawning substrate resulting from siltation. Numerous workers have found that increased levels of A salmonid egg box experiment of Swanside Beck carried out in the spring of 1994, revealed that the survival rates in the majority of sites were good. While the in-site variability was relatively high, mean survival rates remained in excess of 70%. As a result egg survival rates were eliminated as the reason for low juvenile salmonid production. The only site with a relatively low survival rate was Swanside Beck downstream of Cowgill Beck. However, even at this site siltation was eliminated as the cause of the increased mortality rate. It is recommended that a salmonid stocking of Swanside Beck should be carried out this year. This should be followed by an electric fishing survey to evaluate juvenile salmonid survival rates.
Description:
Environment Agency Archives North West
Keywords:
Ecology
;
Fisheries
;
Limnology
;
England
;
Ribble Catchment
;
Salmon fisheries
;
Fry
;
Survival
;
Stocking (organisms)
;
Silting
Repository Name:
AquaDocs
Type:
monograph
Format:
application/pdf
Format:
application/pdf
Format:
12
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