Rearing shrimp (Penaeus monodon) larvae with an artificial diet at different stocking density

Supis Thongrod; Laddawan Sukcharoen; Anand Tunsutapanich; Teerawat Jarit-ngam . Feed Quality Control and Development Div.

Rearing shrimp (Penaeus monodon) larvae with an artificial diet at different stocking density

1999

Supis Thongrod | Laddawan Sukcharoen | Anand Tunsutapanich | Teerawat Jarit-ngam (Department of Fisheries, Bangkok (Thailand). Feed Quality Control and Development Div.)

Results showed that there was no significant different in growth and survival of larvae at the 3 different stocking densities of the 1st trial (P0.05). The highest survival rate at PL-3 (79.5+-10.72 percent) and growth (as total length, 8.32+-0.24 mm) was obtained from the lowest stocking density group (100 larvae/litre). In the 2nd and 3rd trials, growth and survival of larvae from all groups having a stocking density over 100 larvae/litre were not significantly different (P0.05). Therefore, the poorest survival rate was observed from the group with the lowest stocking of 66 larvae/litre, which resulted in termination of this group premature. Water quality, total NH3, pH, NO3 and temperature during all the feeding trials were in a suitable range for larval growth. Total NH3 showed marked increased due to the accumulated waste feed and larval excretion. While pH value were found to decreased as a result of larval metabolism. The result showed that Penaeus monodon larvae should be reared at initial stocking densities above 100 larvae/litre when reared on artificial feed. This appears to be due to the density and availability of the feed supplies.

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