Screening for genetic markers to assess potential genetic impact from salmon ranching on wild stocks
Skaala, Øystein; Dahle, Geir; Taggart, John B.; Jørstad, Knut Eirik; Unneland, Laila; Karlsen, Tove; Bakke, Gunnar; Paulsen, Ole Ingar
Original version
This report is not to be cited without prior reference to the authorsAbstract
Genetic markers are needed to assess the potential genetic impact on wild salmon
populations from ocean ranching. In 1990 spawners from four Norwegian rivers: Lone,
Vosso, Dale and Onarheim were screened for genetic variability in isozymes and genomic
DNA. Variability was detected in LDH, MDH, MEP, IDDH, and with single locus probes
(SLP's) in DNA fingerprint analysis. Sibling groups with the observed variability in
isozymes are kept separate for further studies on the suitability of the observed variants as
genetic markers. Tests of growth rates and survival on different genotypes are being
conducted. Groups of genetically marked salmon will be released to study the potential
impact on wild populations from ocean ranching and enhancement activities.