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FAQs about Cold Water Marine System Maintenance/Operation
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Coldwater Marine Fish Flukes, Copper and Praziquantel
Hello,
<Anthony Calfo in your service>
I have had some wild-caught vermilion rockfish (a Pacific Northwest species)
undergoing copper sulfate treatment for months for monogenean gill trematodes,
and it has not worked.
<yes... it seems that they bury deep enough that a fatal dose will kill the
fish too.>
(We have taken gill biopsies to monitor response to therapy.) The fish are still
in their quarantine tank. I am considering switching to Praziquantel 1ppm for at
least a week. Are there any problems doing both at the same time? Or should the
copper be removed before starting the Praziquantel? Many thanks in advance, Lisa
H.
<Lisa, I would discontinue and remove the copper and use Formalin baths
(short and long with your discretion evaluating the fish). Shown to be quite
effective on gill flukes at 2-4 ml (35-45% solution) per 10l of water for 30
minutes (SHORT) and/or 1-2 drops per gallon every other day through treatment
(LONG). Best regards, Anthony Calfo>
Pisaster disease 4/21/07
Hi,
I have a Pisaster brevispinus in a large temperate system
<Yes, a coldwater species>
and recently it has developed what look almost like blisters all over
its skin. I am having trouble finding information on what this could be
and how to cure it. I have others in the same system that are doing
just fine. I am attaching a picture - hopefully this will help. Please
email me back with what this could be. Thank you.
Sincerely,
Allicia S.
<Have seen, read of this sort of symptom on Asteroids... tropical and
not... but no definitive "cause"/effect, nor cure... I would isolate the
affected individual/s... possibly necropsy ones that perish... Maybe a
call or email to folks at some of the west coast public aquariums...
Fernando Nosratpour at the Birch Aquarium, folks at the Aquarium of the
Pacific in Long Beach, the Monterey... Likely they have seen this in
other Pisaster and Patiria species. Bob Fenner> |
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