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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Use of peracetic acid in pond aquaculture
 FRANĚK, Roman
The aim of the thesis was to verify use of peracetic acid (PAA) in production conditions for ectoparasites control in carp pond farming. First test was about evaluation of organic load in pond water on speed PAA decay in two temperature regime (11 15 and 21 °C). Results showed that between 3 6 hours from PAA application the concentration of PAA was under a half of the initial concentration (6 mg.l-1). Also statically important differences (p= < 0.05) were found in speed of decay between samples with organic load (3 samples from ponds) and samples without organic load (distilled and tap water) in both temperature regimes. Application of PAA during the transport of fish into the transport boxes was performed in three age categories (1, 2 and 3 years old common carps), where the fish were exposed for 60 90 minutes in 1.5 mg.l-1 PAA as Persteril 36. Parasitic examinations of skin and gills showed reduction of number protozoal parasites (Trichodina spp. and Apiosoma spp.) in individuals comparing with control. Against other detected parasites was PAA ineffective. Statistical evaluation showed significant (p= <0.05) decrease in prevalence only in 3 cases out of 19 in total. Long-term four days long fish bath of carps which were heavily infested by Saprolegnia parasitica in 1.5 mg.l-1 PAA an positive effect on the overall survival was found. In the control group mortality reached 100 % the third day of trial, in contrast with treated group where was Saprolegnia parasitica succesfuly eliminated and overall moratily was 40 %. Continual fourteen days long application of PAA by peristaltic pump did not proved.
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