Piscine Reovirus: Genomic and Molecular Phylogenetic Analysis from Farmed and Wild Salmonids Collected on the Canada/US Pacific Coast
"The high genetic homogeneity of PRV S1 sequences in western Canada led Kibenge et al (2013) to conclude that PRV was recently introduced into B.C. waters and dated the divergence from Norwegian sequence types between 2006 and 2008 using molecular clock analysis. However, there is little supporting epidemiological evidence for this hypothesis as there were no documented direct imports of fish eggs into western North America from Norway in that time frame."
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0141475
So that's the argument, no eggs from Norway therefore no Norwegian virus? I'm surprised that a peer reviewed science paper would make such a statement. Perhaps they were not familiar with the DFO website that shows the history of salmon egg imports into BC.
http://www.pac.dfo-mpo.gc.ca/aquaculture/reporting-rapports/egg-oeuf-eng.html
Year Maximum number of eggs authorized for import Area of origin
1985 130,000 Scotland
1986 1,144,000 Scotland
1987 1,281,000 Scotland; Washington State
1988 2,700,000 Scotland; Washington
1989 500,000 Washington State
1990 0
1991 735,000 New Brunswick; Ireland; Washington State
1992 640,000 New Brunswick; Washington State
1993 1,447,000 New Brunswick; Ireland; Washington State
1994 750,000 Washington State
1995 775,000 Washington State; Ireland
1996 1,500,000 Washington State
1997 1,600,000 Washington State
1998 2,400,000 Washington State
1999 2,400,000 Washington State
2000 2,500,000 Washington State
2001 800,000 Washington State
2002 0
2003 0
2004 4,700,000 Iceland
2005 80,000* Iceland
2006 0
2007 1,750,000 Iceland
2008 800,000 Iceland
2009 600,000 Iceland
2010 0
2011 0
2012 0
*Although these eggs were viable and free of disease, the importing company made the decision not to cultivate them based on operational priorities. After receiving authorization from DFO, the eggs were destroyed.
I'll go one better then the author......
There has never been a case of importing salmon eggs from Norway so therefore any virus with the name Norway in it can not be found in Canada. Now move a long nothing to see here.
For others that might be interested here is a link that give a little history of egg imports. I find the 2005 egg imports to be troubling.
http://alexandramorton.typepad.com/...salmon-egg-imports-into-british-columbia.html