Avaliação do efeito da adição de probiótico na dieta de alevinos e juvenis de tilápias-do-nilo (Oreochromis niloticus) criados em esgoto doméstico tratado

Abstract

Avaliação do efeito da adição de probiótico na dieta de alevinos e juvenis de tilápias-do-nilo (Oreochromis niloticus) criados em esgoto doméstico tratado Probiotic addition effect assessment in the diet of fingerling and juvenile Nile tilapia (Oreochromis niloticus) created in treated sewage ABSTRACT The research was conducted to evaluate the effect of using probiotic (Bacillus licheniformis, Bacillus cereus, Bacillus subitillis, yeasts and Saccharomyces cerevisiae and Saccharomyces boulardi) in diets for tilapia, during the fingerling and juvenile stages, that underwent sanitary challenge on performance, chemical composition of the carcasses and water quality. We used three hundred and sixty fingerlings with initial average weight of 2.91±0.37 g and initial average length of 3.30±0.27 cm.The treatments were: T1) farmed fish in clean water, fed with commercial food without the use of probiotics; T2) fish reared in treated sewage water and fed with commercial food without the use of probiotics; T3) farmed fish in a condition similar to T2, with food plus probiotic. In the evaluation of physicochemical parameters of the treated sewage, regardless of the presence or not of probiotic strains, it presents a high primary productivity.The use of probiotics (Bacillus licheniformis, Bacillus cereus and Bacillus subitillis and yeasts -Saccharomyces cerevisiae and Saccharomyces boulardi) promotes improvements in the parameters of feed intake and specific growth rate in the Nile tilapia grown in treated water from sewage, reduces the proportion of lipids in weight gain and increases the proportion of crude protein in weight gain. However, it does not influence weight gain, feed conversion and fish survival. Fish grown in treated sanitary sewage, regardless of the use or not of probiotic strains have a higher protein content and lower fat content.

Effects of different stocking densities and supplementation with Saccharomyces cerevisiae in juvenile Nile tilapia cultivated in a recirculating water system (RAS)

“…In a study conducted by Ferreira et al (2018), the authors supplied S. cerevisiae for tilapia reared in treated sludge and observed a mean value of 1.98 ± 0.51 mg / l of DO, which is considerably lower to the values observed in the present study. Taoka et al (2006a) reported improvements in the survival of fish and in water quality parameters such as pH, N-NH4, N-NO2 and P-PO4 when rearing Japanese sole (Paralichthys olivaceus) supplemented with several probiotics in their diet (Bacillus subtilis at 1.6 × 107 CFU g-1; Lactobacillus acidophilus at 1.2 × 108 CFU g-1; Clostridium butyricum at 2.0 × 107 CFU g-1;…”

Addition Probiotics on Captive Fish Nutrition the benefits, water quality and productive performance: a review

“…At this point, environmental conditions, encompassing all physical, chemical and biological parameters, allow changes in the colonization of organisms, which may or may not be beneficial and modify the vital functions for fish survival in the nursery (BRITO et al, 2019). The type of feed is a determinant of the water quality and its composition, directly influencing the seasonality of the physical, chemical and biotic parameters (FERREIRA et al, 2018).…”

“…Protein-rich, nucleic acid and aminoácid desrations, when passing through catabolic processes, generate toxic residues such as ammonia, nitrites and nitrates. These nitrogen compounds have great interference with fish metabolism, organ morphophysiology since they present thresholds of toxicity and compromise basic vital functions reducing productive performance, which can decrease the rate of dissolved oxygen and the tolerance to diseases leading to high mortality (CARDOSO et al, 2016;CARVALHO et al, 2017;FERREIRA et al, 2018;MARDONES et al, 2018;MOTA et al, 2019;).…”

“…According to Cyrino et al (2010);Ferreira et al (2018) in order to achieve successful production and avoid undesirable conditions during fish farming, it is important to adopt simple water quality management practices. It is necessary to monitor all the limnological factors of the tank, including dissolved oxygen, pH, alkalinity, electrical conductivity, ammonia, nitrites, nitrates, CO2, salinity and temperature (LEIRA et al, 2017).…”

“…Histologically, the regions of the intestine of teleostic fishes have three different portions, which differ by organization, disposition, thickness, ramifications, heights and length of villi and tunics and, moreover, by the number and cell types (Bhat et al, 2019;Gosavi et al, 2019) (Figures 3 A, B, C). Benefits of probiotic supplementation in fish nutrition Ferreira et al (2018); Yang et al (2019) reinforced that the main changes that probiotics applications promote in fish farming are in the gastrointestinal microbiota of the host, increasing nutrient absorption of the diet, and also enhance the nutritional value and intensify immune responses to pathogen. In this sense, the management of the intestinal microbiota becomes crucial, since besides guaranteeing the combat and prevention of diseases, it potentiates the digestibility and absorption of nutrients, resulting in higher productive performance.…”