Elanco's novel in - feed treatment has been approved for the prevention and control
of sea lice in salmon and trout in Chile.
A study done that year found that the number of wild pink salmon were down 80 % since 1970 because
of sea lice infestations.
The sea lice spread to migrating juvenile wild salmon, resulting in the highest numbers
of sea lice observed on wild salmon in a decade.
High ocean temperatures and poor timing of parasite management likely led to an epidemic
of sea lice in 2015 throughout salmon farms in British Columbia's Queen Charlotte Strait, a University of Toronto - led study has found.
«We thought maybe there were more infractions in 2015 that may have led to higher numbers
of sea lice, but when we looked back over 10 -15 years, the rate of such infractions was about the same.
Not exact matches
Significant technical limitations inhibit the more rapid expansion
of organic aquaculture, especially access to organic food sources, but also production
of larvae, protection from parasites such as
sea -
lice and removal
of competition from unwanted species in open cages.
But in British Columbia, the plethora
of fish farms near rivers means that wild juveniles are catching
sea lice and dying off at alarming rates.
Small fish called wrasse painlessly peck
sea lice from the skin
of farmed salmon, enabling salmon farmers rely less on powerful pesticides that can harm other marine life.
«Fish have a limited number
of resources to respond to an illness so their immune system makes choices — when they're infected by
sea lice, for example, the fish's immune system is suddenly geared to respond to that specific threat, leaving them totally exposed to other threats like P. salmonis,» said Dixon, a Canada Research Chair in Fish and Environmental Immunology.
The fall
of 2014 did have a healthy return
of adult pink salmon, bringing
sea lice into near - shore waters where they could infect farmed salmon.
«Furthermore, during the juvenile wild salmon migration, farms are supposed to treat for
sea lice within 15 days
of when a threshold number
of lice are found on adult farmed salmon,» says Peacock.
They found that although the number
of bacteria living inside the fish was much lower in vaccinated fish, they showed many more signs
of infection and a higher death rate compared with the unvaccinated group upon exposure to the
sea lice.
As a result,
sea lice from those farms could have spread to adjacent farms, hampering area - wide control
of the outbreak.
On an adult fish this may be only a nuisance, but for small juvenile salmon (around the size
of a finger),
sea lice can be fatal.
About a centimeter in size, the
sea lice attach themselves to the outside
of a fish and feed on its mucous, blood, and skin.
Not to be confused with an itchy, stinging rash caused by jellyfish larvae, these
sea lice are planktonic marine parasites which feed on many types
of fish.
I think you might want to avoid Atlantic Salmon, AFAIK, it's farmed, which means things like
sea lice and the pesticides used to get rid
of them, lack
of access to what Salmon normally eat, toxins from the feed, artificially colored, lower Omega 3's, though it has higher fat (which means worse O3: O6 ratios), etc..
It has now been established that
sea lice from farms kill up to 95 %
of juvenile wild salmon that migrate past them.
While salmon farmers have discounted concerns that
sea lice are also found in the wild, at the first sign
of an outbreak, they add pesticides to the feed.
Sea lice, in particular, are one
of the worst problems.
To truly whet your appetite, I can?t skip the added ingredients you?ll get with a farmed fillet: dioxins, PCBs, fire retardants (those da - n things are everywhere, aren?t they???), pesticides (especially for
sea lice), antibiotics, copper sulfate (to take care
of algae on the nets), and?
Because the farm pens are essentially open, the enormous amount
of disease - and parasite -(a.k.a.
sea lice?
A surge
of parasitic
sea lice is disrupting salmon farms around the world.
Rock and Roll to Break Your Writer's Block To — Spencer Kornhaber listens to Courtney Barnett and Kurt Vile's Lotta
Sea Lice, which charmingly riffs on the question
of where inspiration comes from.
(One 2011 piece, for instance, consisted
of a cooking pot on an electric burner filled with such ingredients as recalled powdered milk, «abolished math,» antidepressants, palm tree essence, shaved
sea lice, ground Teva rubber dust, Korean thermal clay, and a Swatch watch.)
-
sea lice, algae blooms and other parasites threaten all kinds
of wildlife.
A general theme
of callers was that humans were to blame, whether it was
sea lice from fish farm salmon, forestry, or global warming due to humans.