Throughout the observation period temperature
ranged from 25 to 29.5°C with a mean of
28 ± 1.3°C, Dissolved oxygen varied from 6.0 to
6.8 mg L1, pH was 7.5–8.4 and salinity was
12 ± 1 mg L1 and these values are within
acceptable levels for M. rosenbergii (Roustaian,
Kamarudin, Omar, Saad & Ahmed 1999).