Déposant : Tammy Harris
Communauté : Courtenay
Déposé le : Avril 9, 2011
La Commission devrait examiner si le saumon d’élevage transmet des maladies au saumon sauvage du Fraser. Elle devrait se pencher en particulier sur le rapport technique que rédige le Dr Craig Stephen, du Centre for Coastal Health.
It is good to see that hatchery salmon are at least being looked at. If the Commission refuses to look at the concern, then at least someone is bringing it to the Commission. Heaven knows our Canadian environmental groups will do their best to ignore it (it's not a big money maker).
I was a little confused when I saw "aquaculture" on the list of topics of interest, but all I seem to hear from the misinformed public and media is salmon farming only. Aquaculture is much bigger than that - and that includes the billions of hatchery salmon released every year. I quote the following;
Dr. Craig Stephen, professor of ecosystem health in veterinary medicine faculty, is studying whether salmon from public hatcheries are potentially spreading disease to sockeye salmon in B.C.’s Fraser River, contributing to their decline.
Stephen and his colleagues at the Centre for Coastal Health—a research network that works to identify and understand the interactions of human, animal and environmental health—will submit a scientific report to the Cohen Commission, the federal panel that’s exploring the decline of sockeye salmon in the Fraser River.
The vast majority of wild salmon in the Pacific Ocean begins life in one of dozens of public enhancement hatcheries in rivers on the west coast, says Stephen. “Most salmon losses occur between the time an egg is laid and the young fish head to the ocean. Hatcheries grow these young fish to help to reduce those losses, putting more fish out to sea. We let them go out to the wild, then they spawn back at the hatchery and keep that cycle going.”
While these public hatcheries—regulated by the Department of Fisheries and Ocean—have been putting salmon into the Pacific Ocean for a hundred years or more, in recent decades the practice has started to come under scientific scrutiny.
“When you have fish from hatcheries interacting with truly wild fish in the ocean, there are genetic concerns, there are mixed fish stock concerns, there are competition concerns, and for us, what we’re looking at are disease concerns,” says Stephen. “Most of the work has been done on the genetic issue and the mixed stock fishery; nobody has really looked at this question of disease transmission yet.”
Stephen and his Centre for Coastal Health colleagues will review the scientific literature, gather data on historical health records from enhancement hatcheries, spawning channels and community hatcheries, in order to do a risk assessment on what kind of pathogens exist and how often they emerge. Finally, they will review the hatcheries’ policies and practices to see whether they are preventing, mitigating or controlling these risks.
The Hatchery Disease Impact Assessment will be submitted in June—one of 13 different scientific reports that examine environmental changes along the Fraser River, marine environmental conditions, aquaculture, predators, diseases, water temperature and other factors.
The Cohen Commission will develop recommendations for improving the sustainability of the sockeye salmon fishery in the Fraser River. Its final report to the federal government will be delivered June 2012.