A comparative study of quality of eggs produced from wild and captive spawners of Penaeus indicus and their bacterial populations

Abstract

Based on the morphology, the eggs of Penaeus indicus were classified into five different types : type A eggs with normal development; type B eggs with delayed or abnormal development; type C eggs with undifferentiated embryonic mass; type D eggs with unequal cells and type E unfertilised eggs with orange colour. The incidence of abnormal eggs was high in eyestalk ablated pond reared prawn. Statistical analysis revealed a significant difference in the percentage of abnormal eggs, hatching rate and bacterial numbers between eyestalk ablated pond reared and wild females of prawn. A significant correlation was found between the bacterial numbers and percentage of abnormal eggs, and bacterial numbers and hatching rate of eggs.