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Model systems

The four model systems used in SMOLTPRO will provide unique resources for full-scale tests of alternative rearing methods and the generality of their effects across a range of climate zones in the Baltic Sea, the Kattegat and the North Sea.


Älvkarleby Hatchery

The Swedish Board of Fisheries (SBF) research station in Älvkarleby is a modern facility by the River Dalälven and includes 1) a permanent trap for catching ascending adults, 2) a large research hatchery for large experimental setups, 3) an enclosed 400m river section, and 4) a 110m experimental stream with traps at both ends. Natural production of salmon downstream the power plant in Älvkarleby makes it possible to compare wild-born and hatchery produced fish of the same genetic origin.


Norrfors Hatchery

River Sävarån hosts a monitoring project, including wild smolt counts in rotary screw traps, freshwater habitat mapping and migratory studies based on acoustic telemetry. The largest tributary of River Umeälven, River Vindelälven, is free-flowing but the Norrfors power dam partly restricts natural salmonid migrations. Telemetry studies have provided knowledge on salmonid spawning migrations in the system. Yearly, about 100.000 salmon and 20.000 trout smolts are released from Norrfors compensatory hatchery (Vattenfall AB) which has a fully equipped research laboratory.


NINA Aquatic Research Station in Ims

The Norwegian Institute for Nature Research (NINA) Station at Ims is a unique facility for experimental research on the reproductive behaviour and early life-history of fish. It consists of a hatchery with 164 rearing compartments and four outdoor arenas providing stream environments with an observation/video monitoring system. There is also full control of ascending and descending fish in the River Imsa. Small tributaries to the Imsa provide natural experimental settings. The station has two parallel artificial streams, each being 130 m long with adjustable water flow and outmigration traps. Over 150 papers have been published based on the work from the NINA Research Station at Ims.


Danish Centre for Wild Salmon in Randers

This Danish river exits to the Kattegat Sea where a trap catches all emigrating fish. Furthermore, a PIT antenna system at the outlet is erected, giving the possibility of monitoring all ascending and descending PIT tagged fish. Current studies in the stream include evaluation of the early rearing effects on survival to the smolt stage and a large scale attempt to map behaviour and survival in the marine phase of salmonids. The Danish Centre for Wild Salmon (DCV) is a non-profit organisation producing all hatchery salmon released in Denmark. Fish are produced in a modern recirculating system with the necessary capacity to manipulate the hatchery environment.


Top photo by Kjetil Hindar



The SMOLTPRO model systems from North to South: Norrfors, Älvkarleby, Ims and Randers. 

Natural habitat

Photo by Stefan Larsson

Page Manager: RASMUS KASPERSSON|Last update: 4/25/2013

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