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FISH HEALTH, ETC. / PERSPECTIVE AND OPINION

Sockeye salmon (Oncorhynchus nerka).

cific salmon is being used as a call for the utmost precaution. Unfortunately, some Canadian government non-medical researchers aligned with US and Canadian activists and some disingenuous conservation NGO’s are attempting to make this mostly innocuous virus “the scourge of the seven seas.” They have generated scientific publications that have grossly exaggerated conclusions and that are not supported by their research. They have ignored and dismissed any research or researchers that are contrary to their beliefs, attacking those as biased or involved in a conflict of interest. They have promoted PRV as a danger to resident orcas through the prospect of it wiping out Chinook, which are the resident orca’s food supply. They have even gone so far as to liken it to “small pox wiping out 90% of the indigenous population of North America” when Europeans discovered the Americas.

Impact of manufactured PRV hysteria on aquaculture So, by many standards, PRV is not a pathogen and there is no evidence anywhere that any variant of PRV-1 has been involved in any massive die 58 »

offs of farmed or wild salmon anywhere in the world. It is not regulated anywhere: nationally, regionally, or by individual States and is not listed by the OIE – nor should it be. However, in Washington State, the Dept of Fish and Wildlife has chosen not to follow proper and fair fish health guidelines as per principles laid out by the American Veterinary Medical Association (https://www.avma. org/KB/Policies/Pages/AquaticAnimal-Health-and-Disease-Regulations.aspx). This has made their fish health policies extremely susceptible to the fear-mongers. The rhetoric of the Precautionary Principle and “prove-the-negative” (future article in this column) has been invoked to justify designating any PRV that differs from the “one” in the Pacific Northwest as “exotic” and by default: “Emergency and Eradicable.” To date, policy mandates have in effect resulted in the destruction of 800,000 healthy Atlantic salmon. These fish would not have died from PRV, nor is there any evidence that they would have been a danger to any wild Pacific species, with this supposed “exotic strain” that has most likely been transported into Washington from

Figure 4: An estimated 4x1030 viruses inhabit our oceans, weighing as much as 75 million elephants. End to end (average 100 nm) these would stretch about 10 million light years. With their high mutation rate it is impossible to not transfer viruses of different genome when you transport fish.

AQUACULTURE MAGAZINE December 2018 January 2019_VOL 44 NUM 6  

Production of omega-3 enriched tilapia through the dietary use of algae meal or fish oil: improved nutrient value of fillet and offal

AQUACULTURE MAGAZINE December 2018 January 2019_VOL 44 NUM 6  

Production of omega-3 enriched tilapia through the dietary use of algae meal or fish oil: improved nutrient value of fillet and offal