A radio telemetry study of sea trout Salmo trutta L. spawning migration in the Leba River (northern Poland)
2011
Debowski, P. | Bernas, R. | Skora, M.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of Fish Migratory
The sea trout Salmo trutta L. population in the Leba River (Poland) is sustained through compensatory stocking with smolts. In the autumn of 2007 and 2008, seventy two sea trout were caught in a lake, through which the river flows, several kilometers upstream from its mouth. These individuals were tagged with radio transmitters that were recorded by two automatic stations in the river. They were also monitored with active telemetry. Only 26 of these fish moved upstream (41 percentage in 2007 and 33 percentage in 2008), and five reached the spawning grounds. Neither the release location in the lake nor the size of the fish influenced the timing of the fish entering the river or the extent of their migration. Most of the stocked fish remained in the lower reaches of the river, upstream from the lake
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