Water Quality and Sediment Profile in Shrimp Culture with Different Sediment Redox Potential and Stocking Densities Under Laboratory Condition
Abstract: Sediment quality has
been considered as one of the prime factors influencing the environment quality
that support maximum shrimp production.The aim of the study was toevaluate the
effects of sediment redox potential and shrimp stocking density on the profile
of some sediment and water quality parameters. 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).
Sediment redox potential significantly affected the dissolved oxygen, TAN, NO2,
NO3, and H2S concentrations in the water. Whereas shrimp stocking density
affected all water quality parameters except H2S concentration. Significant
interactions between redox potential and stocking densities were observed in
the nitrite and alkalinity concentrations. The significant effects of both
shrimp density and redox potential on the sediment and water parameters in
particular those that are known to directly affect the shrimp welfare (e.g.
oxygen, ammonia, nitrite and H2S) indicate that these variables are of
important aspects in shrimp pond management. Furthermore, the results clearly
showed that -206mV redox potential significantly reduced the dissolved oxygen
concentration in the sediment-water interface and increased the generation of
H2S in water column. Thereby, this redox potential level is not advisable for
shrimp culture system.
Author: Wiyoto, Sukenda, Enang
Harris, Kukuh Nirmala, Daniel Djokosetiyanto
Journal Code: jpperikanangg160010
