Here's something interesting...
http://aquaculturenorthamerica.com/...ntial-in-reducing-sea-lice-infestation-in-fa/
http://aquaculturenorthamerica.com/...ntial-in-reducing-sea-lice-infestation-in-fa/
She presented her research at the Environmental Research 2016 Review & Seminar Series: Collaborations on BC’s Coast, in Nanaimo, BC at the Vancouver Island Conference Centre on February 17 and 18th, 2016; and hosted by the BC Salmon Farmers Association.Here's something interesting...
http://aquaculturenorthamerica.com/...ntial-in-reducing-sea-lice-infestation-in-fa/
Interesting opinion. Yes Sea Lice have always been around, but not in such a concentration as you get when a smolt passes by an open net pen.[QUOTE="Fishmyster, post: 814857, member: 297" Maybe the lice came before the farm and not the other way around? Just nobody was paying attention or around to acknowledge it.
I'm not a believer that farms have caused the demise in salmon stalks. They are natural and will always be a part of salmon.
Perch - even if helpful w lice loading of caged fish - will not address things like disease vector transfer (e.g. ISAv, PRv, etc) and those impacts. The technology is wrong - the open net-pen is "open" to the environment - everything flows in and out.
There are many different critters called "sea lice", including the parasitic isopods that often are found on halibut lines - so saying you saw balls of sea lice near an estuary might be irrelevant to the discussion of the sea lice that typically affects salmon - that is Lepeophtheirus (aka "Leps) and Caligus spp.
As fogged-in stated: it's the amplification of Leps and Caligus spp. onto the small, outmigrating juvenile salmon that is the issue.
nope. Wasn't discrediting his observations - that's your interpretation - not mine. Just pointing-out many different bugs in the water are loosely termed "sea lice". Only 2 genera are pertinent in the wild/cultured salmon "sea lice" debate - Leps and Caligus - spp. - as mentioned.
No probs Fishmyster. Yep - could be relevant - but only if you knew what you were dealing with. Sure would be nice if people had a plankton net - or cheap alternative onboard. Those kiddy butterfly dip nets work fairly well for sampling - for larger zooplankters. Leps is large and often grey to black - with white/sandy coloured eggs on the gravid females. Caligus is smaller - and with a reddish tinge to the eggs/lice. There are also numerous species of non-parasitic copepods and isopods that "swarm" - as well - especially off shear zones - which is why fry/fish hang-out there as well. Calanus spp. is well known to do that, for example - as well as barnacle and crab larvae/naupilus/zoea - both genera also often found at the lower end of an estuary.Guess it just read like that, sorry. I have seen a similar infestation of lice and they were both attached to salmon or free swimming. So fish camps observations might be very relevant to this thread.
Me to i found 4 differany styles of sea lice on one fish off roysten wreaks.all true there aswell.paddlede out from shore after dimples ato find sea lice.so i hijack this thread .Lice form masses at our estuarys,how other than lazers(love it) can stop the lice?
So...... Fish farms deliver or bring smolts to open water lice free, correct? So in truth the wild salmon are inflicting damage to the fish farms. Lol