YusnainiNur, Indriyani2016-08-282016-08-282016-08-28978-979-792-665-6http://repository.unri.ac.id/xmlui/handle/123456789/8633The outbreak of micro organism infection is used to controlled using antibiotics. As lobsters spawn externally, their eggs were easily infected by microorganisms. To understand the effects of antibiotics in the hatching of P.ornatus eggs, a study has been conducted by removing the eggs from from berried spiny lobsters. The eggs were then treated using two types of antibiotics; Oxytetracyclin (2, 4, 6, and 8 ppm ) and Erythromycin (10, 20, 30, and 40 ppm). The control was not treated with antibiotic. Eggs were then incubated artificially in a recirculation system and monitored at 12, 24, 30, 36, 42, 64, and 88 hours for hatching rate (HR). Results shown that the Oxytetracyclin (6 ppm) and Erythromycin (40 ppm) result significant increase in HR, they were 20% and 18.67%, respectively. Data obtained indicate that antibiotics treatment could be a strategy for increasing the HR of lobster eggs.en-USantibioticegghatchinglobsterOxytetracyclinErythromycinUR-Proceedings