Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 2
Written by Sandița PLĂCINTĂ, Mirela CREȚU, Victor CRISTEA, Iulia GRECU
The experiment aimed to determine the impact of environmental light (spectrum, intensity, and photoperiodicity) on the growth performance of juvenile catfish (Silurus glanis, L., 1758), reared in a recirculating industrial aquaculture system (RAS). The experiment was conducted over 60 days and was organized two variants of light intensity, were compared, in replicate, as follows: in first variant (V1) we used green light with an intensity of 80 lx and in the second version (V2) white light with an intensity of 260 lx. The same photoperiodicity regime was applied in both variants 12L:12D. The initial stocking density was 15.66 kg m-3. The indicators of growth performance, obtained at the end of the experimental period, registered the following results: in the experimental variant V1 (white light), the final stocking density was 28.75 kg m-3, SGR 1.44 %/day compared to V2 experimental variant (light green), compared to a final stocking density of 29.99 kg m-3, a value of 1.31% day-1 for SGR were recorded. The final results of the study indicate a higher growth performance for the experimental variant with a green light (V2), a fact which demonstrates that juvenile catfish show technological plasticity concerning light regime.
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