Published in Scientific Papers. Series D. Animal Science, Vol. LXVI, Issue 1
Written by Gheorghe DOBROTĂ, Nicoleta - Georgeta DOBROTĂ, Mioara COSTACHE
Infection with Saprolegnia spp. is reported more and more frequently, becoming endemic in many aquaculture units, having a devastating impact on this sector, especially on embryonated eggs during the incubation period. This paper presents the way to prevent infection with Saprolegnia spp. by applying prophylactic treatments with formaldehyde to pike-perch eggs, during the embryonic development period. The experiments were carried out in triplicate, at SCDP Nucet, Romania, in 2022, at the artificial fish reproduction station. For prevention, formaldehyde solution was used, in a concentration of 1.7ml/l, the exposure time being different: in version V1 (control) of 10 minutes and in version V2 in which the exposure time was based on the respective water temperature 5, 10 and 15 minutes. The results were very good in the V2 variant with losses due to fungal infection of 4.8%, and good in the V1 variant (control) with losses of 14.6%.
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