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Title: Freshwater migration of sea trout (Salmo trutta L.) in the river Tywi during 1988, 1989 and 1990
Author: D.M. Evans
Author: W.K. Purvis
Author: D.M. Mee
Author: D.R.K. Clarke
Document Type: Monograph
The results of a three year study to examine the freshwater movements of sea trout entering the River Tywi between 1988 and 1990 are examined. Sea trout were obtained from a temporary main-river trap, estuarial seine nets and trap (jumper) nets in the outer estuary. Radio or CART (combined acoustic and radio tag) tags were inserted into the stomachs of the fish before they were released. The sea trout were subsequently detected either passively using fixed listening stations, or actively by boat, foot and air tracking. 63 sea trout entered freshwater over the three years, 10 in 1988, 23 in 1989 and 30 in 1990. Data are presented describing the fate of the tagged sea trout, their patterns of freshwater migration and the influence of environmental variables upon this behaviour. Management implications arising from these results are also discussed.
Publisher: National Rivers Authority
Publication Date: 1994
Publication Place: Cardiff
Subject Keywords: River fisheriesEstuarine fisheriesTroutMigrationEnvironmental factors
Geographic Keywords: WalesLoughor to Taf catchment
Taxonomic Keywords: Salmo trutta
Extent: 34; + tables and figures
Total file downloads: 287

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