Formalin treatments before eyeing and hand-picking of Arctic charr (Salvelinus alpinus) eggs – re-evaluating the timing of antifungal treatments
Tom Robin Olk
Espen Lydersen
Jens Wollebæk
10.23642/usn.7334573.v1
https://usn.figshare.com/articles/dataset/Formalin_treatments_before_eyeing_and_hand-picking_of_Arctic_charr_Salvelinus_alpinus_eggs_re-evaluating_the_timing_of_antifungal_treatments/7334573
<p>Arctic
charr (<i>Salvelinus alpinus</i>) eggs in
hatcheries are treated for fungal infections using formalin before, and
hand-picking during the eyed stage. The relative effectiveness of the
treatments was evaluated using a factorial design with the application of
weekly hand-picking, and formalin treatments at 380 ppm for 13 minutes three
times weekly as factors. The effects of the treatments on total mortality and
hatching success were compared using a two-way ANOVA. Both treatments exhibited
significant, positive effects on egg survival. Hand-picking during the eyed
stage (+ 0.5 to 2.5 % survival to hatch) was found to be more effective than
formalin treatments before (+ 0.0004 to 0.8 % survival to hatch). This is
likely due to differences in the timing of administration of the treatments. The
probability of fungal infections is indicated to vary with time, and a peak
seemed to occur at hatch. </p>
2019-02-12 11:25:30
antifungal treatments
fish eggs
Salvelinus alpinus
Formalin
Hand-picking
Animal Reproduction
Aquaculture
Fish Pests and Diseases