SEDIMENT PROFILE, PRODUCTION PERFORMANCE AND WHITE SPOT SYNDROME VIRUS (WSSV) RESISTANCE IN SHRIMP CULTURE WITH DIFFERENT SEDIMENT REDOX POTENTIAL AND STOCKING DENSITIES UNDER LABORATORY CONDITION

Wiyoto¹², Sukenda¹, Enang Harris¹, Kukuh Nirmala¹, Daniel Djokosetiyanto¹, Julie Ekasari¹
1) Department of Aquaculture, Faculty of Fisheries and Marine Science, Bogor Agricultural University
2) Production Technology and Management of Aquaculture, Vocational Study Program, Bogor Agricultural University
Email: wiyoto2001@yahoo.com

Redox potential represent the intensity of anaerobic condition in the pond sediment, which may affect the dominant microbial transformations of substances, the toxins production, mineral solubility, as well as the Sediment quality. The aim of the study was to evaluate the effects of sediment redox potential and shrimp stocking density on the profile of some sediment, shrimp production performance, immune response and resistance against white spot syndrome virus (WSSV) infection. Two factors randomized factorial design was applied, with stocking density (60 and 120 shrimps.m^-2) as the first variable and sediment redox potential (-65 mV, -108 mV and -206 mV) as the second variable. Some significant changes in TP, total Mn, and total S concentrations in the sediment were observed after the experimentation (P<0.05). The survival and biomass production were significantly reduced at -206 mV sediment redox potential, regardless the stocking density. Highly negative sediment redox potential (-206 mV) and higher stocking density significantly reduced total haemocyte counts and phenoloxydase activity, and the shrimp resistance to WSSV infection. We recommend to maintain the redox potential of pond sediment at a level of more than -108 mV.