Rezumatul tezei de doctorat - USAMV Cluj-Napoca

esearchers, which take place in May-June months, the reproduction period, when there is
observed a high incidence of saprolegniasis. At lower temperatures, the fungus is present
even if to infest the fish populations it needs a longer incubation period. At carp populations,
which are wintering under the ice and have reduced movements, the incidence is lower
compared to the other species, being infested only the individuals which were weak in
winter period or had wounds generated by manipulation procedures.
II.2. RESULTS REGARDING SAPROLEGNIA’S GROWTH AND
DEVELOPMENT ON THE CULTURE MEDIA
II.2.1. Comparative results regarding the growth
of Saprolegnia colonies on solid culture media
We used two solid media to be able to test comparatively the growth type of the
colonies, at 24, 48 and 72 hours. From each fishpond of each fishery, there were constituted
2 samples, one for each medium. Because the two samples from the two media, are
originating from the same culture, inoculated at 6 days, we consider that the growing
differences at the same temperature gradient, of 22°C, are assigned to the differences
between species and to the culture requests.
To interpret statistical correctly the colonies growth differences on the two culture
media and at the three temperature gradients, we present in table 2 the average values of
colonies development in mm.
The diameter averages of Saprolegnia colonies at 24, 48 and 72 hours
of development on the two solid culture media (in mm)
Table 2
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