High Gyrodactylus salaris infection rate in triploid Atlantic salmon Salmo salar

• DOI: 10.3354/dao02242
• Publication Date: 2010-05-17T05:31:58Z
• Authors: MV Ozerov; J Lumme; P Päkk; P Rintamäki; MS Ziętara; Y Barskaya; D Lebdeva; E Saadre; R Gross; CR Primmer; A Vasemägi
• Keywords: Gyrodactylus

We describe an unusually high infection rate of Gyrodactylus salaris Malmberg in juvenile Atlantic salmon Salmo salar L. Baltic Sea origin, which are generally believed to be more resistant G. than East populations. Based on analyses mitochondrial (complete cytochrome oxidase 1 [CO1] gene, 1548 bp) and nuclear (ADNAM1, 435 bp; internal transcribed spacer [ITS] rDNA region, 1232 DNA fragments, the closest relatives characterized Estonian strain were parasites found off Swedish west coast Raasakka hatchery, Iijoki (Baltic Sea, Finland). Analyses 14 microsatellite loci host S. salarrevealed that approximately 40% studied fish triploids. subsequently identified triploid origin as susceptible their diploid counterparts, possibly due compromised complement-dependent immune pathways salmon. This is accordance with earlier studies have shown elevated susceptibility triploids various viral or bacterial pathogens, represents one first reports increased salmonid ectoparasite. However, further experimental work needed determine whether compared irrespective particular triploidization method population origin.