Lactobacillus strains isolated from oysters improve the production of Crassostrea gigas larvae

One of the main problems in laboratories oyster seed production occurs stage settlement or fixation and metamorphosis larvae. The organisms develop drastic morphological physiological changes at this stage, exposing them to attack by pathogenic microorganisms. Numerous studies indicate that before larval a substrate, they require bacteria stimulate induce process. In study, Japanese (Crassostrea gigas) larvae were fed with combinations microalgae previously selected for their probiotic potential; impact on survival, growth, was evaluated. Larvae D 12 days old provided private company transported laboratory under controlled conditions. Probiotic Lactobacillus plantarum 69Cr, L. fermentum 101Cc, casei 43Cg reactivated MRS applied concentration 1×104 CFU mL-1. Microalgae Isochrysis galbana Chaetoceros calcitrans grown F2 medium supplied 3×104 cells Results showed, all treatments, survival range 39-53%, growth 300-310 μm, 34-56.5% settlement. However, best combined I. C. 69Cr 54% 310 μm 56.5% It is concluded combination has potential be used