Effect of early co feeding weaning on Sobaity sea bream larvae performance (Sparidentex hasta)

In this study، the possibility of early weaning and its effect on growth، survival rate and quality of Sobaity Sea bream (Sparidentex hasta) larvae from 25 (control group) to 18 (treatment group) days post hatch (DPH) were investigated. For growth rate measurement، sampling was done prior to starting test on 0، 2، 4، 10، 14، 16، and 18، and afterward on 25، 32 and 39 DPH; and for survival rate، cannibalism rate and also larval quality on 39 day post hatch. The result showed that thought from the starting of weaning to the end of rearing، the Specific growth rate (SGR) was significantly higher in control group than early treatment (p<0. 05)، there was no significant difference on SGR between two treatments during the whole rearing period. Relative growth rate (RGR) did have the equal progress among sampling days in control treatment، but there was significant increased pattern in early treatment (p<0. 05). Early weaning did not have significant effect on survival rate، cannibalism rate، and quality of larvae (p>0. 05). These results showed that the early weaning of Sobaity Sea bream S. hasta larvae on 18 DPH was possible without having undesirable affects on SGR، survival rate and quality loss which is more economic for farmer.