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¹ Faculty of Animal Science and Biotechnologies, Banat’s University of Agricultural Sciences and Veterinary Medicine, King Michael I of Romania” from Timișoara, 119 Calea Aradului, 300645, Timișoara, Romania
² National Agricultural Research and Innovation Centre, Research Institute of Fisheries and Aquaculture (NARIC-HAKI), 8 Anna-liget, 5540, Szarvas, Hungary
³ Faculty of Veterinary Medicine, Banat’s University of Agricultural Sciences and Veterinary Medicine „King Michael I of Romania” from Timișoara, 119 Calea Aradului, 300645, Timișoara, Romania DOI : 10.4194/1303-2712-v16_4_16 Viewed : 4430 - Downloaded : 2726 A study on Sander lucioperca age classes to assess preference for background color was imagined. Two groups: G1 (92 days old, average weight: 6.2 ±1.6 g) and G2 (461 days and 101.7 ±27.1 g), were continuously observed for 24 hours after one day of acclimation, using 90 fish / group (30 fish / replication / 24 hours), their behavior being recorded with cam-recorders. For the study, the walls and bottom of a rectangular research tank were colored equally in: grey, light and dark blue and green. During the study, were made 216 observations / group (72 observations / replication) and were statistically analyzed using Duncan test, with a confidence level of P˂ 0.05 or lower. Results revealed that a significant number from G1 was located on the green space, in order, preferred background color being: green, grey, dark and light blue. The G2 group expressed also high affinity for the green color (P< 0.001) concluding that, green background can give a safety feeling to the pikeperch, thus, rearing or transport of pikeperch categories in green tanks could have the benefit of stress decreasing and added benefit for this fish species in the aim of advancing the Recirculating Aquaculture Systems. Keywords : RAS, color preference, behavior, pikeperch