Dissolved oxygen (DO) is a major limiting factor in aquaculture. The bottom layer of pond waters, where shrimps spend most of their time, may become hypoxic or even anoxic due to organisms' respiration and decomposition of accumulated organic matter of feed remains and feces, particularly at nighttime. These hypoxic conditions can certainly threaten shrimps' life. Hence, DO have often been considered an important environmental factor determining the success and intensification of shrimp culture. DO values higher than 5 mg l− 1 have often been recommended for intensive culture practices (Cheng et al., 2003).