Gabriele Lara

Pontificia Universidad Católica de Valparaíso | PUCV · School of Ocean Sciences

The natural productivity in biofloc culture systems could be an important source of supplementary food to shrimp, representing savings in artificial feed. The aim of the present study was to evaluate the effects of using different feeding rates for a period of 21 days with a posterior re-feeding period in a microcosm system in the presence of biofl...

Mugil cephalus is an estuarine species that has been shown to acclimate to a diversity of environmental conditions being a good candidate to diversify aquaculture. The objective of this study was to evaluate the growth and water quality of M. cephalus juveniles in a biofloc technology system (BFT). Over a period of 87 days, mullet juveniles (117.36...

The potential of polychaetes for the bioremediation of aquaculture sludge gained more attention in recent years. These organisms can reduce organic matter and nutrients contained in the sludge of several aquaculture species, improving the sustainability of these activities. The aim of this study was to evaluate the removal performance of Perinereis...

Shrimp production in biofloc systems generates excess organic matter that must be removed from the system. Due to its ability to consume natural productivity, the integration of tilapia in shrimp culture could help to reduce the levels of total suspended solids in the biofloc system. The present study aimed to evaluate two stocking densities of til...

Integrating marine shrimp and tilapia has been shown to be a viable alternative in a system based on bioflocs, but there is no consensus on the spatial arrangement of farmed animals. The present study aims to (1) compare the performance of shrimp and fish in high density when subjected to polyculture (species in the same tank) and multitrophic (spe...

The integration of bioremediation systems is one of the most promising techniques to mitigate the environmental impact of aquaculture effluents. Also, it allows nutrient recycling, production diversification, and the creation of high-value by-products. In marine aquaculture, where the implementation of salt-tolerant extractive species is essential,...

This study evaluated the influence of different quantities of artificial substrate on water quality and the performance of Litopenaeus vannamei in an integrated biofilm-biofloc culture system. Thus, three treatments were performed: the control, the treatment without the addition of artificial substrate; T200, the treatment with a 200 % increase in...

The present study aimed to compare a Litopenaeus vannamei culture throughout two short cycles and one long cycle of production in a BFT (biofloc technology) system. The study was conducted in six lined 600‐m² ponds and was composed of two treatments with three replicates each: two short consecutive crops (SC) of 75 days and a 150‐day long cycle (LC...

This study evaluated the use of biofilm in a Litopenaeus vannamei biofloc system using different feeding rates. Shrimp juveniles (0.89 ± 0.35 g) were stocked at 300 shrimp m−3 in 24,150-L tanks. The feeding rates were calculated by considering an expected weekly growth of 1 g week−1 and an estimated weekly mortality of 0.5%. Each treatment correspo...

The purpose of this study was to evaluate the colonization ability of a commercial probiotic mixture in the gut of Litopenaeus vannamei reared in BFT and a clear water culture and to verify the effects of the probiotic on the gut bacterial abundance of Vibrio sp. and Bacillus sp. when added to the biofloc or clear water culture system. The 45-day e...

A infecção por Mycobacterium spp. tem sido constatada em diversos vertebrados, ocasionando doenças em humanos e animais. As espécies responsáveis pela ocorrência de micobacteriose em peixes, a saber, Mycobacterium marinum, M. fortuitum e M. chelonae, também são potencialmente infecciosas para os camarões peneí­­deos. A micobacteriose que afeta crus...

This study evaluated the effects of different aeration types on water quality, shrimp growth and biofloc composition in a Litopenaeus vannamei culture. The study was conducted with three treatments: (1) PR—propeller aspirator pump aerator; (2) VP—vertical pump aerator; and (3) BL—diffused air blower. The study was performed in a greenhouse with nin...

Shrimp farming has recently pursued systems that minimize the use of water. A biofloc technology (BFT) culture system contributes to water quality by removing nitrogen compounds, supplementing the shrimp diet and allowing for the use of high stocking densities. In addition, this system enables the culture with minimal water exchange. This study rai...

This study evaluates the effects of the previous addition of sodium nitrite (NaNO2) and biofilm in a Litopenaeus vannamei biofloc culture. Five treatments were tested in 180 L - tanks: NaNO2 (-20) addition of NaNO2 for 20 days before stocking and without artificial substrates; NaNO2+B (-20) addition of NaNO2 for 20 days before stocking, with 150% a...

The aim of this study was to evaluate the addition of artificial substrates in biofloc technology systems that are used for the intensive production of Litopenaeus vannamei. The experiment lasted 35 days. Tanks each with a useful volume of 800 L were filled with water containing bioflocs (25 % of the total volume) and filtered seawater. Three treat...

Effects of shrimp confinement in a situation of high density stocking in a long term nursery on their growth performance in grow out ponds. Were analized two nurseries with a density of 2000 shrimp m-2 were stocked at two different times. The first nursery (LTN) lasted 144 days, and the SGR of the animals was 3.0% day-1. The second nursery (STN) la...

Effects of shrimp confinement in a situation of high density stocking in a long term nursery on their growth performance in grow out ponds. Were analized two nurseries with a density of 2000 shrimp m-2 were stocked at two different times. The first nursery (LTN) lasted 144 days, and the SGR of the animals was 3.0% day-1. The second nursery (STN) la...

We analyzed the effect of commercial bacterial probiotics on a Litopenaeus vannamei biofloc culture system infected with Vibrio parahaemolyticus. Three replicates of two experimental treatments were conducted: a control system (without probiotic) and a system with the application of a multistrain probiotic containing Bacillus spp., Enterococcus spp...

The use of the same water over multiple culture cycles in a biofloc technology system can be highly beneficial. This study evaluated the effect of different levels of biofloc-rich water on selected water quality indicators and on the productive performance of Pacific white shrimp, Litopenaeus vannamei, juveniles (3.5 g) stocked at 312 juveniles/m3...

The purpose of this study was to evaluate the effect of stocking density and the occurrence of compensatory growth in the white shrimp Litopenaeus vannamei in the nursery phase reared in a biofloc culture system. Two experiments were performed in a recirculating water system with 12 experimental tanks (microcosm), each with a bottom area of 0.5 m2....

O objetivo deste estudo foi avaliar o efeito de altas densidades de estocagem na sobrevivência, crescimento e na taxa de conversão alimentar de camarões Litopenaeus vannamei, na fase final de engorda em sistema de Biofloc Technology (BFT), mantendo os mesmos parâmetros de água para todos os tratamentos. Os camarões (11,96 ± 1,14g) foram estocados e...

The aim of this study was to evaluate the effect of high stocking densities on survival, growth and feed conversion rates of Litopenaeus vannamei shrimp, in final growout phase, in a Biofloc Technology (BFT) culture system, keeping the same water parameters for all treatments. Shrimps (11.96 ± 1.14 g) were stocked in microcosms (0.50/m2 tanks), con...