Abstract:A study was conducted with newly hatched larvae of blue swimming crab, Portunus pelagicus reared
in six different treatments. Treatment 1 larvae was fed with rotifer only at zoea 1 to megalopa stages, Treatment
2 larvae was fed with Artemiaonly at zoea 1 to megalopa stages and Treatment 3 larvae was fed with rotifer at
zoea 1 to megalopa stages with Artemiaat zoea 2 to megalopa stages. Meanwhile in Treatment 4, rotifer was
given at zoea 1 to megalopa stages with Artemiaat zoea 3 to megalopa stages and in Treatment 5 larvae was
fed with rotifer at zoea 1 to megalopa stages and Artemiaat zoea 4 to megalopa stages for Portunus pelagicus
larvae. In Treatment 6 larvae was fed with rotifer at zoea 1 to megalopa stages and Artemiaat megalopa stages.
Result shows that there was higher survival rate of zoea 2 stages of larval on the Treatment 1 in the diet whilst
Treatment 2 suffered high mortality. The highest survival rate and growth rate was obtained in Treatment 3.
There was no significant difference (P=1.0;P>0.05) between the mean values of development duration for all
treatment except for Treatment 3 where the development from zoea 4 to megalopa stages was 1 day faster. Based
on results, further experiments should be done to evaluate differential nutritional composition when larvae are
reared in large quantity for mass seed production.
Key words:Artemia Brachioussp., Feeding regimes Larvae Portunus pelagicus