Myxozoan parasites are known pathogens of cultured finfish. Kudoa neurophila n. comb. (Grossel, Dykova, Handlinger & Munday) has historically infected hatchery-produced striped trumpeter, Latris lineata (Forster in Bloch and Schneider), a candidate species for seacage aquaculture in Australia. We examined the efficacy of four water treatment methods to prevent K. neurophila infection in post-larval (paperfish) and juvenile striped trumpeter. Treatments included dose-controlled ultraviolet irradiation [hydro-optic disinfection (HOD)], ozone with conventional UV (ozone), mechanical filtration at 25 lm and then foam fractionation (primary filtration), and 50-lm-filtered sea water (control). In post-larvae (initially 10.3 +- 2.7 g, mean +- SD, 259 days post-hatching, dph), the infection prevalence (PCR test) after 51 days was 93 +- 12% in the control, 100 +- 0% in primary filtration and 0 +- 0% in both ozone and HOD. Likewise, in juveniles (initially 114 +- 18 g, 428 dph), prevalence was 100 +- 0% in the control and primary filtration treatments with no infection detected in ozone and HOD. Concurrently, there was a 50-100% reduction in heterotrophic bacteria and 100% reduction in presumptive Vibrio sp. in sea water HOD and ozone treatments. HOD with a dose of >=44 mJ cm ^-2 UV was as effective

Item Type:	Refereed Article
Keywords:	hydro-optic UV disinfection,infection, Kudoa neurophila, myxozoa, ozone,treatments, water treatment
Research Division:	Agricultural, Veterinary and Food Sciences
Research Group:	Fisheries sciences
Research Field:	Aquaculture
Objective Division:	Animal Production and Animal Primary Products
Objective Group:	Fisheries - aquaculture
Objective Field:	Aquaculture fin fish (excl. tuna)
UTAS Author:	Cobcroft, JM (Dr Jennifer Cobcroft)
UTAS Author:	Battaglene, SC (Associate Professor Stephen Battaglene)
ID Code:	81641
Year Published:	2013
Web of Science® Times Cited:	17
Deposited By:	Sustainable Marine Research Collaboration
Deposited On:	2012-12-20
Last Modified:	2022-08-30
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