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`Investigation of the perceived decline in size of Atlantic salmon (Salmo salar) in the River Frome, Dorset` - SF0207

R&D Summary Objectives:- To analyse historical net and rod catch data and records of ascending salmon in order to ascertain reasons for the perceived decline in the River Frome salmon population. Key Customer Purpose:- To provide information on the exploitation of the Atlantic salmon in the River Frome.
The automatic resistivity fish counter on the River Frome has been running since 1972. Good records of ascending fish have been collected over this period. A camera connected to the counter is triggered as each fish ascends. There is a fixed pattern of movement of each sea age of salmon up the Frome with 3 sea winter fish ascending in Feb/March, 2 SW fish in April/May and Grilse (1 SW) ascending in June/July. An autumn run of mixed sea ages occurs. By assessing the lengths of fish running in each month for each year any decline in size will be apparent.
Time-Scale and Cost
From: 1991

To: 1992

Cost: £51,000
Contractor / Funded Organisations
Natural Environment Research Council
Fields of Study
Freshwater Fisheries