Desempenho de pós larvas de cascudo preto (Rhinelepis aspera), alimentadas com naúplios de artemia e ração oferecida em saches

The objective of this work was to evaluate the performance of Rhinelepis aspera post larvae submitted to two diets. Completely randomized design with two treatments and eight repetitions were used. The stock density was seven post larvae per liter. The diets were composed by A, powder ration with 55% CP offered in organza sachets and B, 850 Artemia nauplii supplied to each post larvae three times a day. There was no significant difference between treatments in survival (P >= 0,05), but there was in biometry. The ration offered in sachets induced the highest averages in length (mm) and weight (mg), whilst the "natural diets" induced higher values of the condition factor. The results show that the ration sachets can be a promising alternative to larvae culture of R. aspera.