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Movements of two strains of radio tagged Altlantic salmon, Salmo salar L., smolts through a reservoir
Author(s) -
Aarestrup K.,
Jepsen N.,
Rasmussen G.,
Òkland F.
Publication year - 1999
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1046/j.1365-2400.1999.00132.x
Subject(s) - salmo , fishery , hatchery , smoltification , biology , fish migration , salmonidae , fish <actinopterygii>
Smolt migration through a shallow and turbid hydro‐reservoir in a major Danish river system was investigated using radiotelemetry. Hatchery‐reared 1+‐year‐old Atlantic salmon, Salmo salar L., smolts of equal size from two different non‐native strains were radio‐tagged and followed during their downstream migration through the 12‐km‐long reservoir. A total of 50 salmon smolts, 25 of Swedish (Øtran River) and 25 of Irish (Burrishoole River) origin, were surgically implanted with miniature radiotransmitters. The tagged smolts were tracked daily over a 3‐week period in May 1996. The Øtran smolts initiated migration first ( P < 0.001), moved faster ( P < 0.01), were delayed less when passing a culvert ( P < 0.001) and were more successful in moving through the reservoir than the Burrishoole smolts. The observed differences in migratory behaviour are interpreted as evidence of a genetic component influencing smolt migration.