Probiotics evaluation on performance parameters of post-larvae of Litopenaeus vannamei

Abstract

The objective of the search was evaluation of the difference between treatment with the probiotic 1 (P1) in relation when treatment with probiotic 2 (P2) in the larvae cultivation of the Litopenaeus vannamei, these were culture for 18 days. The treatment with P1 consisted in the addition of the commercial probiotic Epicin G2 (Epicore Networks Eastampton, United State) containing Bacillus subtilis, B. licheniformis, Lactobacillus acidophilus, B. pumilus and Saccharomyces cerevisiae. In the treatment with P2, was utilized commercial probiotic ProBacyl (Bern&Roc Aquacultura Ltda, Ceará-Mirim, Brazil) with a mixture of B. subtilis, B. licheniformis, Pediococcus acidilactici and probiotic bacteria (total). The experimental units consisted of six tanks of 15,000 L, and each treatment had three repetitions. The probiotics were applied daily in the water, evaluating the zootechnical potential and resistance to stress larvae and post-larvae (PL). The parameters salinity, temperature, pH and oxygen dissolved were controlled. The post-larvae submitted for P2 presented medium values higher (p < 0,05) to length (PL 1 and PL 5), humid and dry weights (PL 5) and metamorphosis percentage (90%) compared to the other treatment, but as other variables did not differ. The final survival was 56,4% and 64,9% to post-larvae submitted to P1 and P2, respectively. Thus, the probiotic 2 showed better results than P1 for cultivation of L. vannamei in commercial hatchery system at some stages of development.