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Orcasphere » Virus implicated in Fraser sockeye (and chinook?) mortality
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Virus implicated in Fraser sockeye (and chinook?) mortality


The idea that a virus may play a part in the unpredictable Fraser river sockeye returns is (month) old news, but this article in Scientific American is the first to mention chinook that I’ve seen.  Perhaps the fate of the southern resident killer whales (who specialize on Fraser chinook in the summertime) is more connected than we thought to whatever marine factors govern the population dynamics of Fraser River sockeye?

“One of the most important findings of this study was the fact that salmon were already compromised before entering the river” on their journey home to spawn, she wrote. The scientists are currently studying juvenile salmon to see if the genomic signature is already present before they go out to the open ocean. Miller-Saunders also reports “there is some indication that the signature may be in Chinook and coho” salmon, too.

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[...] Remember that DFO scientist Miller-Saunders told Scientific American last spring that “there is some indication that the signature may be in Chinook and coho” salmon, too.  To what data was she referring, I wonder?  Was it derived from out-migrating smolts or returning adults, wild or hatchery fish?  Was she referring to Fraser Chinook and coho, or some other stocks? [...]