FN Archimer Export Format PT J TI Long-term effects of moderate elevation of oxidation–reduction potential on European seabass (Dicentrarchus labrax) in recirculating aquaculture systems BT AF LI, Xian PRZYBYLA, Cyrille TRIPLET, Sebastien LIU, Ying BLANCHETON, Jean-Paul AS 1:1;2:2;3:2;4:;5:2,3; FF 1:;2:PDG-RBE-MARBEC-L3AS;3:PDG-RBE-MARBEC-LSEA;4:;5:PDG-RBE-MARBEC-L3AS; C1 Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China Ifremer, Palavas-les-Flots 34250, France UMR Ecosym, USTL, Montpellier 34000, France C2 INST OCEANOL QINGDAO, CHINA IFREMER, FRANCE UNIV MONTPELLIER, FRANCE SI PALAVAS SE PDG-RBE-MARBEC-L3AS PDG-RBE-MARBEC-LSEA UM MARBEC IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france copubli-int-hors-europe copubli-sud IF 1.381 TC 6 UR https://archimer.ifremer.fr/doc/00244/35562/34132.pdf LA English DT Article DE ;Oxidation–reduction potential;Seawater;European seabass;Welfare;RASs AB The long term effects of moderate elevation ORP (oxidation–reduction potential) around 300–320 mV on the growth, hematological parameters and the ability of European seabass (Dicentrarchus labrax) to react against bacterial infection was studied in recirculating aquaculture systems (RASs). Two RASs, one with a moderate ozonation (RAS-O3) and a control (RAS-C) were used in this experiment. After 60 days, seabass reared in the RAS-O3 were more able to react against a Vibrio anguillarum infection. It was in spite of the fact that seabass in the RAS-O3 showed decreased feed intake, feed conversion rate, growth rate and modified hematological parameters compared with the fish in RAS-C. It is obvious that an ORP level of 300–320 mV is too high for seabass to adapt in terms of the growth performance and the hematological parameters. However the increased ORP resulted in a better ability of the fish to react against bacterial infection. Our results strongly suggest that ORP for seabass in RAS should be elevated but not exceeding 300 mV and a slightly increased and well controlled ORP level (above 240–270 mV) has a positive effect on the disease resistance of fish. For the future, molecular methods could be utilized to identify which functional groups of microbe are contributing to the ORP effect and investigate how ORP influenced fish physiology in RASs. PY 2015 PD JAN SO Aquacultural Engineering SN 0144-8609 PU Elsevier VL 64 UT 000350093900003 BP 15 EP 19 DI 10.1016/j.aquaeng.2014.11.006 ID 35562 ER EF