Análisis del efecto sustitutivo de alimento comercial por Sistema Biofloc en cultivo dulceacuícola de camarón (Litopenaeus vannamei)

Abstract

To determinate the productive viability of the biofloc system in freshwater cultivation of L. vannamei Post larva 14 (PL14) for 90 days, n = 25,000 total organisms were used, distributed in 3 lots, each one with 5000 individuals: L1 with two repetitions: L2 and L3, formed the study lot; Lot 4= positive control, Lot 5= negative control, the PL were distributed by a completely randomized design, the studied variables were: survival in the acclimation period and water chemical analyzes (Total Ammoniacal Nitrogen ). However, in the acclimation period (day 13), mortality of 100% of the PL14 was recorded when reaching salinities of 0 ppt. The development of microbial flocks in fresh water for 14 weeks was viable, reporting volumes of 16 ml / L. An ionic imbalance of the Na +: K + 2: 5 ratio was noted in the quality of the water used for the acclimation period and flocs development. It is concluded that, there are high variations of NAT (Total Ammoniacal Nitrogen) and pH variations (P <0.05) during acclimation. However, no temperature influence (P> 0.05) on the period of acclimation and growth of the microbial floc was reported.