Production of ciliate and nematodes for use as live food for shrimp in the nursery stage grown in the midst of bioflocs
A Ciliate and Nematode Cultivation Medium - MCCN was developed to massively produce flagellate, ciliate and nematode communities in an economical way, for later use as living food. After the development of this production methodology, (Chapter 1) two experiments were carried out where ciliate (Chapter 2) and nematodes (Chapter 3) produced were offered to larvae of the white shrimp Litopenaeus vannamei (PL 8) in the initial, intermediate and final stages of cultivation. The first results obtained using MCCN as a source of live food showed that the feeding preference of Litopenaeus vannamei post-larvae varied according to the stage of their development. In the initial phase of cultivation, the post-larvae captured preferably ciliate and rotifers,nematodes, on the other hand, were effectively predated in the 3 analyzed phases. The final weight of the shrimp grown in the BFT system (“Biofloc Technology”) enriched with nematodes was significantly higher than that obtained by the shrimp grown in the BF control treatment, indicating the great potential of these organisms to increase the productivity of the super intensive crops of marine shrimps.