Effect of temperature on growth, survival and
feeding rate of humpback grouper larvae (Cromileptes altivelis) (GRIMC)
The aim of this experiment was to find the optimum water
temperature for growth and survival in the initial stage of humpback grouper
larvae. The experiment was carried out in the 12 polycarbonate tanks, 30 1
volume. Tanks were placed in water bath system to control and maintain water
temperature at the levels of 25, 28, and 31 °C, and without temperature
controller. The experiment was designed using randomized block design
(RBD) with three blocks for each treatment.
The results of the experiment showed that growth of
larvae in terms of total length, dorsal and pectoral spine development
were significantly better for larvae at temperature of 28 and 31°C. Growth
of larvae at temperature 25°C was very slow. The best survival of larvae
was found at the rearing temperature of 28°C (48.1 %). Survival of larvae
at 31°C, 25°C, and without temperature controller were 4.8 %, 31.6 %, and
11.2 %, respectively.
(from Grouper Research Briefs in Aquaculture Asia,
Vol. VI, No. 2, April-June 2001)